/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:57:33,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:57:33,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:57:33,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:57:33,633 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 16:57:33,667 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:57:33,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:57:33,668 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:57:33,668 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:57:33,669 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:57:33,669 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:57:33,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:57:33,670 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:57:33,670 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:57:33,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:57:33,671 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:57:33,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:57:33,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:57:33,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:57:33,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:57:33,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:57:33,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:57:33,672 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:57:33,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:57:33,672 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:57:33,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:57:33,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:57:33,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:57:33,672 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:57:33,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:57:33,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:57:33,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:57:33,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:57:33,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:57:33,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:57:33,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:57:33,674 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:57:33,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:57:33,674 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:57:33,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:57:33,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:57:33,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:57:33,947 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:57:33,948 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:57:33,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl [2022-03-15 16:57:33,949 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl' [2022-03-15 16:57:33,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:57:33,970 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:57:33,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:57:33,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:57:33,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:57:33,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:33" (1/1) ... [2022-03-15 16:57:33,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:33" (1/1) ... [2022-03-15 16:57:33,990 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:57:33,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:57:33,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:57:33,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:57:33,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:57:33,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:33" (1/1) ... [2022-03-15 16:57:33,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:33" (1/1) ... [2022-03-15 16:57:33,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:33" (1/1) ... [2022-03-15 16:57:33,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:33" (1/1) ... [2022-03-15 16:57:34,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:33" (1/1) ... [2022-03-15 16:57:34,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:33" (1/1) ... [2022-03-15 16:57:34,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:33" (1/1) ... [2022-03-15 16:57:34,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:57:34,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:57:34,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:57:34,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:57:34,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:33" (1/1) ... [2022-03-15 16:57:34,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:57:34,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:34,032 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 16:57:34,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 16:57:34,060 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:57:34,060 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:57:34,060 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:57:34,060 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:57:34,060 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:57:34,060 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:57:34,061 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:57:34,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:57:34,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:57:34,061 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 16:57:34,061 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 16:57:34,061 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 16:57:34,061 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:57:34,103 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:57:34,104 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:57:34,228 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:57:34,240 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:57:34,240 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:57:34,242 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:57:34 BoogieIcfgContainer [2022-03-15 16:57:34,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:57:34,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:57:34,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:57:34,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:57:34,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:57:33" (1/2) ... [2022-03-15 16:57:34,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9d14c7 and model type parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:57:34, skipping insertion in model container [2022-03-15 16:57:34,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:57:34" (2/2) ... [2022-03-15 16:57:34,252 INFO L111 eAbstractionObserver]: Analyzing ICFG parray-copy.wvr.bpl [2022-03-15 16:57:34,260 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:57:34,261 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:57:34,261 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:57:34,261 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:57:34,316 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-15 16:57:34,367 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:57:34,377 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 16:57:34,377 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-15 16:57:34,392 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 31 transitions, 86 flow [2022-03-15 16:57:34,441 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 113 states have (on average 2.7787610619469025) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 113 states have (on average 2.7787610619469025) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:34,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 16:57:34,483 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:34,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:34,484 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:34,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:34,488 INFO L85 PathProgramCache]: Analyzing trace with hash 599746223, now seen corresponding path program 1 times [2022-03-15 16:57:34,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:34,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370703091] [2022-03-15 16:57:34,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:34,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:34,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:34,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370703091] [2022-03-15 16:57:34,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370703091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:57:34,736 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:57:34,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:57:34,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151222235] [2022-03-15 16:57:34,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:57:34,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:57:34,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:34,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:57:34,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:57:34,801 INFO L87 Difference]: Start difference. First operand has 114 states, 113 states have (on average 2.7787610619469025) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:34,904 INFO L93 Difference]: Finished difference Result 156 states and 438 transitions. [2022-03-15 16:57:34,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:57:34,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 16:57:34,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:34,919 INFO L225 Difference]: With dead ends: 156 [2022-03-15 16:57:34,919 INFO L226 Difference]: Without dead ends: 156 [2022-03-15 16:57:34,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:57:34,923 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 81 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:34,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 14 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:57:34,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-15 16:57:34,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 135. [2022-03-15 16:57:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8059701492537314) internal successors, (376), 134 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:34,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 376 transitions. [2022-03-15 16:57:34,994 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 376 transitions. Word has length 20 [2022-03-15 16:57:34,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:34,995 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 376 transitions. [2022-03-15 16:57:34,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:34,995 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 376 transitions. [2022-03-15 16:57:34,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:57:34,999 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:34,999 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] [2022-03-15 16:57:34,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:57:35,000 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:35,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:35,001 INFO L85 PathProgramCache]: Analyzing trace with hash -530635729, now seen corresponding path program 1 times [2022-03-15 16:57:35,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:35,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966056881] [2022-03-15 16:57:35,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:35,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:35,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:35,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966056881] [2022-03-15 16:57:35,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966056881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:57:35,050 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:57:35,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:57:35,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618834272] [2022-03-15 16:57:35,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:57:35,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:57:35,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:35,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:57:35,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:57:35,053 INFO L87 Difference]: Start difference. First operand 135 states and 376 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2022-03-15 16:57:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:35,097 INFO L93 Difference]: Finished difference Result 160 states and 450 transitions. [2022-03-15 16:57:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:57:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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 [2022-03-15 16:57:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:35,100 INFO L225 Difference]: With dead ends: 160 [2022-03-15 16:57:35,100 INFO L226 Difference]: Without dead ends: 160 [2022-03-15 16:57:35,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:57:35,102 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:35,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 16 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:57:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-15 16:57:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-03-15 16:57:35,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.830188679245283) internal successors, (450), 159 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:35,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 450 transitions. [2022-03-15 16:57:35,117 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 450 transitions. Word has length 22 [2022-03-15 16:57:35,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:35,117 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 450 transitions. [2022-03-15 16:57:35,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2022-03-15 16:57:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 450 transitions. [2022-03-15 16:57:35,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:57:35,123 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:35,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:35,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 16:57:35,123 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:35,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:35,124 INFO L85 PathProgramCache]: Analyzing trace with hash 247610633, now seen corresponding path program 1 times [2022-03-15 16:57:35,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:35,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717592177] [2022-03-15 16:57:35,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:35,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:35,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:35,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717592177] [2022-03-15 16:57:35,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717592177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:35,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697400623] [2022-03-15 16:57:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:35,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:35,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:35,496 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:35,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:57:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:35,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:57:35,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:35,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:57:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:36,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:36,071 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:57:36,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-03-15 16:57:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:36,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697400623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:36,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:36,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2022-03-15 16:57:36,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679978895] [2022-03-15 16:57:36,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:36,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:57:36,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:36,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:57:36,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:57:36,371 INFO L87 Difference]: Start difference. First operand 160 states and 450 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:37,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:37,089 INFO L93 Difference]: Finished difference Result 480 states and 1349 transitions. [2022-03-15 16:57:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:57:37,090 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:57:37,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:37,093 INFO L225 Difference]: With dead ends: 480 [2022-03-15 16:57:37,093 INFO L226 Difference]: Without dead ends: 312 [2022-03-15 16:57:37,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:57:37,095 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 335 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:37,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 121 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:57:37,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-15 16:57:37,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 194. [2022-03-15 16:57:37,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.8911917098445596) internal successors, (558), 193 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 558 transitions. [2022-03-15 16:57:37,111 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 558 transitions. Word has length 24 [2022-03-15 16:57:37,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:37,111 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 558 transitions. [2022-03-15 16:57:37,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:37,111 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 558 transitions. [2022-03-15 16:57:37,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:57:37,113 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:37,113 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:37,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-15 16:57:37,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:37,336 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:37,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:37,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1205438725, now seen corresponding path program 2 times [2022-03-15 16:57:37,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:37,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088431141] [2022-03-15 16:57:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:37,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:37,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:37,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088431141] [2022-03-15 16:57:37,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088431141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:37,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406615877] [2022-03-15 16:57:37,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:57:37,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:37,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:37,588 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:37,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:57:37,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:57:37,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:37,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:57:37,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:37,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:57:38,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:38,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:38,075 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:57:38,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-03-15 16:57:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:38,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406615877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:38,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:38,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-03-15 16:57:38,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101622074] [2022-03-15 16:57:38,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:38,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:57:38,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:38,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:57:38,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:57:38,319 INFO L87 Difference]: Start difference. First operand 194 states and 558 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:39,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:39,418 INFO L93 Difference]: Finished difference Result 598 states and 1797 transitions. [2022-03-15 16:57:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 16:57:39,418 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:57:39,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:39,423 INFO L225 Difference]: With dead ends: 598 [2022-03-15 16:57:39,423 INFO L226 Difference]: Without dead ends: 571 [2022-03-15 16:57:39,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=460, Invalid=1990, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:57:39,425 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 307 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:39,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 219 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 477 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2022-03-15 16:57:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-03-15 16:57:39,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 287. [2022-03-15 16:57:39,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.944055944055944) internal successors, (842), 286 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 842 transitions. [2022-03-15 16:57:39,442 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 842 transitions. Word has length 24 [2022-03-15 16:57:39,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:39,442 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 842 transitions. [2022-03-15 16:57:39,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:39,443 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 842 transitions. [2022-03-15 16:57:39,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:57:39,444 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:39,445 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:39,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:39,667 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,SelfDestructingSolverStorable3 [2022-03-15 16:57:39,668 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:39,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:39,668 INFO L85 PathProgramCache]: Analyzing trace with hash -695052013, now seen corresponding path program 3 times [2022-03-15 16:57:39,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:39,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323516076] [2022-03-15 16:57:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:39,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:39,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:39,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323516076] [2022-03-15 16:57:39,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323516076] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:39,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848271456] [2022-03-15 16:57:39,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:57:39,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:39,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:39,888 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:39,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:57:39,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:57:39,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:39,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:57:39,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:40,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:57:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:40,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:40,332 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:57:40,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-03-15 16:57:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:40,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848271456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:40,537 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:40,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-03-15 16:57:40,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908015806] [2022-03-15 16:57:40,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:40,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:57:40,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:40,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:57:40,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:57:40,538 INFO L87 Difference]: Start difference. First operand 287 states and 842 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:42,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:42,503 INFO L93 Difference]: Finished difference Result 935 states and 2785 transitions. [2022-03-15 16:57:42,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:57:42,504 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:57:42,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:42,509 INFO L225 Difference]: With dead ends: 935 [2022-03-15 16:57:42,509 INFO L226 Difference]: Without dead ends: 832 [2022-03-15 16:57:42,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=817, Invalid=3875, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:57:42,511 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 429 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 453 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:42,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 299 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 606 Invalid, 0 Unknown, 453 Unchecked, 0.4s Time] [2022-03-15 16:57:42,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-03-15 16:57:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 321. [2022-03-15 16:57:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 3.003125) internal successors, (961), 320 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:42,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 961 transitions. [2022-03-15 16:57:42,526 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 961 transitions. Word has length 24 [2022-03-15 16:57:42,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:42,527 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 961 transitions. [2022-03-15 16:57:42,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 961 transitions. [2022-03-15 16:57:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:57:42,528 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:42,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:42,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:42,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:42,740 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:42,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1991715119, now seen corresponding path program 4 times [2022-03-15 16:57:42,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:42,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093638189] [2022-03-15 16:57:42,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:42,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:42,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:42,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093638189] [2022-03-15 16:57:42,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093638189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:42,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501308874] [2022-03-15 16:57:42,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:57:42,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:42,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:42,920 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:42,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:57:42,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:57:42,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:42,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 16:57:42,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:43,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:57:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:43,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:43,195 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:57:43,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-03-15 16:57:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:43,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501308874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:43,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:43,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 16:57:43,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506313032] [2022-03-15 16:57:43,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:43,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:57:43,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:43,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:57:43,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:57:43,408 INFO L87 Difference]: Start difference. First operand 321 states and 961 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:44,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:44,020 INFO L93 Difference]: Finished difference Result 517 states and 1513 transitions. [2022-03-15 16:57:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:57:44,020 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:57:44,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:44,023 INFO L225 Difference]: With dead ends: 517 [2022-03-15 16:57:44,023 INFO L226 Difference]: Without dead ends: 486 [2022-03-15 16:57:44,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:57:44,024 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 156 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:44,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 228 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:57:44,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-03-15 16:57:44,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 325. [2022-03-15 16:57:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.996913580246914) internal successors, (971), 324 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:44,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 971 transitions. [2022-03-15 16:57:44,035 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 971 transitions. Word has length 24 [2022-03-15 16:57:44,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:44,035 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 971 transitions. [2022-03-15 16:57:44,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:44,035 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 971 transitions. [2022-03-15 16:57:44,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:57:44,036 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:44,036 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:44,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-15 16:57:44,251 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 [2022-03-15 16:57:44,251 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:44,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:44,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1504212173, now seen corresponding path program 5 times [2022-03-15 16:57:44,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:44,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836246545] [2022-03-15 16:57:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:44,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:44,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:44,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836246545] [2022-03-15 16:57:44,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836246545] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:44,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564265892] [2022-03-15 16:57:44,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:57:44,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:44,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:44,406 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:44,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:57:44,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:57:44,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:44,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 16:57:44,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:44,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:57:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:44,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:44,783 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:57:44,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-03-15 16:57:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:44,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564265892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:44,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:44,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-15 16:57:44,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375244436] [2022-03-15 16:57:44,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:45,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:57:45,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:45,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:57:45,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:57:45,001 INFO L87 Difference]: Start difference. First operand 325 states and 971 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:45,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:45,772 INFO L93 Difference]: Finished difference Result 556 states and 1609 transitions. [2022-03-15 16:57:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:57:45,773 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:57:45,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:45,776 INFO L225 Difference]: With dead ends: 556 [2022-03-15 16:57:45,776 INFO L226 Difference]: Without dead ends: 510 [2022-03-15 16:57:45,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:57:45,777 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 148 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:45,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 265 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 718 Invalid, 0 Unknown, 78 Unchecked, 0.3s Time] [2022-03-15 16:57:45,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-03-15 16:57:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 327. [2022-03-15 16:57:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9938650306748467) internal successors, (976), 326 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:45,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 976 transitions. [2022-03-15 16:57:45,787 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 976 transitions. Word has length 24 [2022-03-15 16:57:45,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:45,787 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 976 transitions. [2022-03-15 16:57:45,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:45,787 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 976 transitions. [2022-03-15 16:57:45,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:57:45,788 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:45,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:45,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:46,015 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 [2022-03-15 16:57:46,016 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:46,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:46,016 INFO L85 PathProgramCache]: Analyzing trace with hash 206371921, now seen corresponding path program 6 times [2022-03-15 16:57:46,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:46,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781010695] [2022-03-15 16:57:46,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:46,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:57:46,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:46,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781010695] [2022-03-15 16:57:46,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781010695] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:46,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15575909] [2022-03-15 16:57:46,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:57:46,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:46,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:46,130 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:46,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:57:46,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:57:46,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:46,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 16:57:46,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:46,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:57:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:46,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:46,509 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:57:46,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-03-15 16:57:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:46,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15575909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:46,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:46,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 22 [2022-03-15 16:57:46,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131378350] [2022-03-15 16:57:46,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:46,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:57:46,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:46,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:57:46,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:57:46,698 INFO L87 Difference]: Start difference. First operand 327 states and 976 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:48,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:48,222 INFO L93 Difference]: Finished difference Result 827 states and 2341 transitions. [2022-03-15 16:57:48,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:57:48,223 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:57:48,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:48,227 INFO L225 Difference]: With dead ends: 827 [2022-03-15 16:57:48,227 INFO L226 Difference]: Without dead ends: 785 [2022-03-15 16:57:48,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 16:57:48,229 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 287 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:48,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 313 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 737 Invalid, 0 Unknown, 313 Unchecked, 0.4s Time] [2022-03-15 16:57:48,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-03-15 16:57:48,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 353. [2022-03-15 16:57:48,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.022727272727273) internal successors, (1064), 352 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:48,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1064 transitions. [2022-03-15 16:57:48,242 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1064 transitions. Word has length 24 [2022-03-15 16:57:48,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:48,242 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1064 transitions. [2022-03-15 16:57:48,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:48,243 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1064 transitions. [2022-03-15 16:57:48,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:57:48,244 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:48,244 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] [2022-03-15 16:57:48,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:48,451 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 [2022-03-15 16:57:48,451 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:48,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:48,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1282993899, now seen corresponding path program 7 times [2022-03-15 16:57:48,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:48,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042345476] [2022-03-15 16:57:48,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:48,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:48,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:48,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042345476] [2022-03-15 16:57:48,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042345476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:48,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008044457] [2022-03-15 16:57:48,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:57:48,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:48,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:48,514 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:48,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:57:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:48,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:57:48,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:48,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:48,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008044457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:48,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:48,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:57:48,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463749573] [2022-03-15 16:57:48,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:48,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:57:48,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:48,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:57:48,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:57:48,806 INFO L87 Difference]: Start difference. First operand 353 states and 1064 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:50,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:50,776 INFO L93 Difference]: Finished difference Result 2020 states and 5811 transitions. [2022-03-15 16:57:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-15 16:57:50,776 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:57:50,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:50,787 INFO L225 Difference]: With dead ends: 2020 [2022-03-15 16:57:50,787 INFO L226 Difference]: Without dead ends: 2020 [2022-03-15 16:57:50,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4273 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-03-15 16:57:50,792 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 434 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:50,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 389 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:57:50,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2022-03-15 16:57:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 426. [2022-03-15 16:57:50,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.2188235294117646) internal successors, (1368), 425 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:50,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1368 transitions. [2022-03-15 16:57:50,819 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1368 transitions. Word has length 26 [2022-03-15 16:57:50,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:50,819 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1368 transitions. [2022-03-15 16:57:50,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:50,820 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1368 transitions. [2022-03-15 16:57:50,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:57:50,821 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:50,821 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] [2022-03-15 16:57:50,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:51,044 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 [2022-03-15 16:57:51,044 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:51,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:51,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1524378449, now seen corresponding path program 8 times [2022-03-15 16:57:51,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:51,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291274751] [2022-03-15 16:57:51,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:51,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:51,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:51,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291274751] [2022-03-15 16:57:51,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291274751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:51,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808625082] [2022-03-15 16:57:51,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:57:51,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:51,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:51,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:51,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:57:51,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:57:51,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:51,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:57:51,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:51,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:51,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808625082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:51,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:51,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:57:51,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501270707] [2022-03-15 16:57:51,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:51,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:57:51,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:51,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:57:51,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:57:51,342 INFO L87 Difference]: Start difference. First operand 426 states and 1368 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:52,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:52,109 INFO L93 Difference]: Finished difference Result 1467 states and 4213 transitions. [2022-03-15 16:57:52,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:57:52,109 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:57:52,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:52,117 INFO L225 Difference]: With dead ends: 1467 [2022-03-15 16:57:52,117 INFO L226 Difference]: Without dead ends: 1467 [2022-03-15 16:57:52,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:57:52,118 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 344 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:52,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 186 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:57:52,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-03-15 16:57:52,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 438. [2022-03-15 16:57:52,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.2128146453089244) internal successors, (1404), 437 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:52,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1404 transitions. [2022-03-15 16:57:52,139 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1404 transitions. Word has length 26 [2022-03-15 16:57:52,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:52,139 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1404 transitions. [2022-03-15 16:57:52,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:52,140 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1404 transitions. [2022-03-15 16:57:52,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:57:52,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:52,141 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] [2022-03-15 16:57:52,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-15 16:57:52,360 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 [2022-03-15 16:57:52,360 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:52,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:52,360 INFO L85 PathProgramCache]: Analyzing trace with hash 673708591, now seen corresponding path program 9 times [2022-03-15 16:57:52,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:52,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288129737] [2022-03-15 16:57:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:52,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:52,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:52,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288129737] [2022-03-15 16:57:52,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288129737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:52,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195396848] [2022-03-15 16:57:52,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:57:52,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:52,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:52,410 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:52,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:57:52,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:57:52,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:52,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 16:57:52,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:52,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:57:52,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:57:52,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:52,888 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 16:57:52,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-03-15 16:57:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:57:53,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195396848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:53,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:53,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 27 [2022-03-15 16:57:53,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668940779] [2022-03-15 16:57:53,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:53,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:57:53,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:53,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:57:53,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:57:53,134 INFO L87 Difference]: Start difference. First operand 438 states and 1404 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:54,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:54,740 INFO L93 Difference]: Finished difference Result 1576 states and 4704 transitions. [2022-03-15 16:57:54,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 16:57:54,740 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 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 26 [2022-03-15 16:57:54,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:54,747 INFO L225 Difference]: With dead ends: 1576 [2022-03-15 16:57:54,747 INFO L226 Difference]: Without dead ends: 1576 [2022-03-15 16:57:54,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2258 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1436, Invalid=5704, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 16:57:54,749 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 550 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 513 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:54,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 418 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 871 Invalid, 0 Unknown, 513 Unchecked, 0.4s Time] [2022-03-15 16:57:54,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-03-15 16:57:54,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 431. [2022-03-15 16:57:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.2093023255813953) internal successors, (1380), 430 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:54,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1380 transitions. [2022-03-15 16:57:54,769 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1380 transitions. Word has length 26 [2022-03-15 16:57:54,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:54,769 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1380 transitions. [2022-03-15 16:57:54,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:54,770 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1380 transitions. [2022-03-15 16:57:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:57:54,771 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:54,771 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] [2022-03-15 16:57:54,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:54,993 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 [2022-03-15 16:57:54,994 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:54,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:54,994 INFO L85 PathProgramCache]: Analyzing trace with hash -48760871, now seen corresponding path program 10 times [2022-03-15 16:57:54,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:54,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112489258] [2022-03-15 16:57:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:54,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:55,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:55,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112489258] [2022-03-15 16:57:55,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112489258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:55,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425124409] [2022-03-15 16:57:55,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:57:55,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:55,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:55,052 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:55,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:57:55,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:57:55,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:55,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:57:55,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:55,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:55,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425124409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:55,275 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:55,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:57:55,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467305715] [2022-03-15 16:57:55,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:55,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:57:55,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:55,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:57:55,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:57:55,276 INFO L87 Difference]: Start difference. First operand 431 states and 1380 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:55,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:55,786 INFO L93 Difference]: Finished difference Result 1470 states and 4175 transitions. [2022-03-15 16:57:55,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:57:55,787 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:57:55,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:55,792 INFO L225 Difference]: With dead ends: 1470 [2022-03-15 16:57:55,792 INFO L226 Difference]: Without dead ends: 1470 [2022-03-15 16:57:55,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:57:55,793 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 276 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:55,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 174 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:57:55,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-03-15 16:57:55,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 443. [2022-03-15 16:57:55,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.2036199095022626) internal successors, (1416), 442 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:55,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1416 transitions. [2022-03-15 16:57:55,812 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1416 transitions. Word has length 26 [2022-03-15 16:57:55,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:55,812 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1416 transitions. [2022-03-15 16:57:55,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:55,812 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1416 transitions. [2022-03-15 16:57:55,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:57:55,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:55,814 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] [2022-03-15 16:57:55,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:56,036 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 [2022-03-15 16:57:56,037 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:56,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:56,037 INFO L85 PathProgramCache]: Analyzing trace with hash 483145443, now seen corresponding path program 11 times [2022-03-15 16:57:56,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:56,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788690691] [2022-03-15 16:57:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:56,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:56,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:56,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788690691] [2022-03-15 16:57:56,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788690691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:56,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829250526] [2022-03-15 16:57:56,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:57:56,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:56,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:56,098 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:56,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:57:56,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:57:56,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:56,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:57:56,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:56,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:56,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829250526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:56,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:56,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:57:56,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926955668] [2022-03-15 16:57:56,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:56,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:57:56,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:56,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:57:56,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:57:56,285 INFO L87 Difference]: Start difference. First operand 443 states and 1416 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:56,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:56,793 INFO L93 Difference]: Finished difference Result 1271 states and 3742 transitions. [2022-03-15 16:57:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:57:56,794 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:57:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:56,799 INFO L225 Difference]: With dead ends: 1271 [2022-03-15 16:57:56,800 INFO L226 Difference]: Without dead ends: 1267 [2022-03-15 16:57:56,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:57:56,801 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 283 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:56,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 164 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:57:56,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-03-15 16:57:56,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 491. [2022-03-15 16:57:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.1714285714285713) internal successors, (1554), 490 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:56,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1554 transitions. [2022-03-15 16:57:56,818 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1554 transitions. Word has length 26 [2022-03-15 16:57:56,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:56,819 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1554 transitions. [2022-03-15 16:57:56,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:56,819 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1554 transitions. [2022-03-15 16:57:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:57:56,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:56,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:56,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:57,039 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 [2022-03-15 16:57:57,039 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:57,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:57,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1461702887, now seen corresponding path program 12 times [2022-03-15 16:57:57,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:57,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974665345] [2022-03-15 16:57:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:57,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:57,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:57,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974665345] [2022-03-15 16:57:57,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974665345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:57,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716670745] [2022-03-15 16:57:57,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:57:57,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:57,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:57,091 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:57,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:57:57,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:57:57,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:57,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:57:57,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:57,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:57,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716670745] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:57,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:57,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:57:57,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609141481] [2022-03-15 16:57:57,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:57,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:57:57,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:57,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:57:57,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:57:57,290 INFO L87 Difference]: Start difference. First operand 491 states and 1554 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:57,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:57,918 INFO L93 Difference]: Finished difference Result 1396 states and 4042 transitions. [2022-03-15 16:57:57,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:57:57,919 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:57:57,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:57,923 INFO L225 Difference]: With dead ends: 1396 [2022-03-15 16:57:57,924 INFO L226 Difference]: Without dead ends: 1396 [2022-03-15 16:57:57,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:57:57,925 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 269 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:57,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 197 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:57:57,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2022-03-15 16:57:57,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 485. [2022-03-15 16:57:57,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.1714876033057853) internal successors, (1535), 484 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1535 transitions. [2022-03-15 16:57:57,940 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1535 transitions. Word has length 26 [2022-03-15 16:57:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:57,940 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1535 transitions. [2022-03-15 16:57:57,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:57,941 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1535 transitions. [2022-03-15 16:57:57,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:57:57,942 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:57,942 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] [2022-03-15 16:57:57,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:58,164 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 [2022-03-15 16:57:58,164 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:58,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:58,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1976268135, now seen corresponding path program 13 times [2022-03-15 16:57:58,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:58,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283855229] [2022-03-15 16:57:58,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:58,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:58,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:58,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283855229] [2022-03-15 16:57:58,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283855229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:58,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513234857] [2022-03-15 16:57:58,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:57:58,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:58,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:58,231 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:58,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:57:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:58,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:57:58,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:58,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:58,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513234857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:58,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:58,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:57:58,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792889891] [2022-03-15 16:57:58,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:58,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:57:58,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:58,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:57:58,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:57:58,474 INFO L87 Difference]: Start difference. First operand 485 states and 1535 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:59,437 INFO L93 Difference]: Finished difference Result 2177 states and 6037 transitions. [2022-03-15 16:57:59,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:57:59,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:57:59,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:59,444 INFO L225 Difference]: With dead ends: 2177 [2022-03-15 16:57:59,444 INFO L226 Difference]: Without dead ends: 2177 [2022-03-15 16:57:59,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:57:59,446 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 427 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:59,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 306 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:57:59,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2022-03-15 16:57:59,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 509. [2022-03-15 16:57:59,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.22244094488189) internal successors, (1637), 508 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:59,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1637 transitions. [2022-03-15 16:57:59,466 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1637 transitions. Word has length 26 [2022-03-15 16:57:59,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:59,466 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 1637 transitions. [2022-03-15 16:57:59,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:59,466 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1637 transitions. [2022-03-15 16:57:59,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:57:59,468 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:59,468 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] [2022-03-15 16:57:59,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:59,682 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 [2022-03-15 16:57:59,682 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:57:59,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:59,683 INFO L85 PathProgramCache]: Analyzing trace with hash 845077903, now seen corresponding path program 1 times [2022-03-15 16:57:59,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:59,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626389161] [2022-03-15 16:57:59,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:59,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:57:59,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:59,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626389161] [2022-03-15 16:57:59,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626389161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:59,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683669891] [2022-03-15 16:57:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:59,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:59,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:59,742 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:59,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:57:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:59,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:57:59,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:57:59,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:57:59,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683669891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:59,915 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:59,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-15 16:57:59,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367627188] [2022-03-15 16:57:59,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:59,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:57:59,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:59,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:57:59,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:57:59,916 INFO L87 Difference]: Start difference. First operand 509 states and 1637 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:00,036 INFO L93 Difference]: Finished difference Result 734 states and 2247 transitions. [2022-03-15 16:58:00,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:58:00,036 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:58:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:00,039 INFO L225 Difference]: With dead ends: 734 [2022-03-15 16:58:00,039 INFO L226 Difference]: Without dead ends: 734 [2022-03-15 16:58:00,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:58:00,040 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 99 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:00,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 52 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:58:00,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-03-15 16:58:00,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 529. [2022-03-15 16:58:00,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.234848484848485) internal successors, (1708), 528 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:00,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1708 transitions. [2022-03-15 16:58:00,052 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1708 transitions. Word has length 26 [2022-03-15 16:58:00,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:00,053 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 1708 transitions. [2022-03-15 16:58:00,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:00,053 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1708 transitions. [2022-03-15 16:58:00,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:58:00,054 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:00,054 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] [2022-03-15 16:58:00,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:00,271 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 [2022-03-15 16:58:00,272 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:00,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:00,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1808051533, now seen corresponding path program 14 times [2022-03-15 16:58:00,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:00,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780214128] [2022-03-15 16:58:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:00,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:00,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:00,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780214128] [2022-03-15 16:58:00,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780214128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:00,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053994688] [2022-03-15 16:58:00,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:58:00,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:00,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:00,317 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:00,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:58:00,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:58:00,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:00,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:58:00,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:00,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:00,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053994688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:00,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:00,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-15 16:58:00,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163880860] [2022-03-15 16:58:00,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:00,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:58:00,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:00,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:58:00,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:58:00,485 INFO L87 Difference]: Start difference. First operand 529 states and 1708 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:00,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:00,902 INFO L93 Difference]: Finished difference Result 1299 states and 3870 transitions. [2022-03-15 16:58:00,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:58:00,903 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:58:00,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:00,906 INFO L225 Difference]: With dead ends: 1299 [2022-03-15 16:58:00,906 INFO L226 Difference]: Without dead ends: 1299 [2022-03-15 16:58:00,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:58:00,907 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 190 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:00,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 160 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:58:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2022-03-15 16:58:00,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 559. [2022-03-15 16:58:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 3.227598566308244) internal successors, (1801), 558 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1801 transitions. [2022-03-15 16:58:00,923 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1801 transitions. Word has length 26 [2022-03-15 16:58:00,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:00,923 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1801 transitions. [2022-03-15 16:58:00,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:00,923 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1801 transitions. [2022-03-15 16:58:00,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:58:00,925 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:00,925 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] [2022-03-15 16:58:00,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:01,139 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 [2022-03-15 16:58:01,140 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:01,140 INFO L85 PathProgramCache]: Analyzing trace with hash -957947885, now seen corresponding path program 15 times [2022-03-15 16:58:01,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:01,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522231995] [2022-03-15 16:58:01,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:01,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:01,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:01,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522231995] [2022-03-15 16:58:01,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522231995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:01,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265213222] [2022-03-15 16:58:01,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:58:01,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:01,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:01,199 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:01,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:58:01,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:58:01,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:01,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:58:01,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:01,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:01,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265213222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:01,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:01,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:58:01,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241130974] [2022-03-15 16:58:01,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:01,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:58:01,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:01,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:58:01,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:58:01,438 INFO L87 Difference]: Start difference. First operand 559 states and 1801 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:02,185 INFO L93 Difference]: Finished difference Result 2205 states and 6353 transitions. [2022-03-15 16:58:02,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:58:02,186 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:58:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:02,191 INFO L225 Difference]: With dead ends: 2205 [2022-03-15 16:58:02,191 INFO L226 Difference]: Without dead ends: 2205 [2022-03-15 16:58:02,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:58:02,193 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 472 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:02,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 247 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:58:02,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2022-03-15 16:58:02,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 652. [2022-03-15 16:58:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 3.3179723502304146) internal successors, (2160), 651 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 2160 transitions. [2022-03-15 16:58:02,220 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 2160 transitions. Word has length 26 [2022-03-15 16:58:02,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:02,220 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 2160 transitions. [2022-03-15 16:58:02,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:02,221 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 2160 transitions. [2022-03-15 16:58:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:58:02,222 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:02,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:02,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:02,445 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 [2022-03-15 16:58:02,445 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:02,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:02,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2007423219, now seen corresponding path program 2 times [2022-03-15 16:58:02,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:02,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566668979] [2022-03-15 16:58:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:02,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:58:02,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:02,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566668979] [2022-03-15 16:58:02,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566668979] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:02,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809492963] [2022-03-15 16:58:02,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:58:02,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:02,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:02,488 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:02,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:58:02,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:58:02,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:02,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:58:02,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:58:02,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:58:02,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809492963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:02,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:02,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-15 16:58:02,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112964385] [2022-03-15 16:58:02,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:02,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:58:02,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:02,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:58:02,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:58:02,678 INFO L87 Difference]: Start difference. First operand 652 states and 2160 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:02,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:02,813 INFO L93 Difference]: Finished difference Result 1170 states and 3661 transitions. [2022-03-15 16:58:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:58:02,814 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:58:02,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:02,816 INFO L225 Difference]: With dead ends: 1170 [2022-03-15 16:58:02,816 INFO L226 Difference]: Without dead ends: 1146 [2022-03-15 16:58:02,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:58:02,816 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 167 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:02,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 58 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:58:02,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2022-03-15 16:58:02,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 757. [2022-03-15 16:58:02,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.3465608465608465) internal successors, (2530), 756 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:02,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2530 transitions. [2022-03-15 16:58:02,835 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2530 transitions. Word has length 26 [2022-03-15 16:58:02,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:02,836 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2530 transitions. [2022-03-15 16:58:02,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:02,836 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2530 transitions. [2022-03-15 16:58:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:58:02,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:02,838 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] [2022-03-15 16:58:02,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:03,053 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 [2022-03-15 16:58:03,053 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:03,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:03,054 INFO L85 PathProgramCache]: Analyzing trace with hash -370202563, now seen corresponding path program 16 times [2022-03-15 16:58:03,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:03,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975408061] [2022-03-15 16:58:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:03,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:03,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:03,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975408061] [2022-03-15 16:58:03,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975408061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:03,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916391472] [2022-03-15 16:58:03,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:58:03,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:03,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:03,114 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:03,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:58:03,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:58:03,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:03,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:58:03,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:03,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:03,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916391472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:03,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:03,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:58:03,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681231180] [2022-03-15 16:58:03,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:03,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:58:03,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:03,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:58:03,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:58:03,341 INFO L87 Difference]: Start difference. First operand 757 states and 2530 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:04,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:04,202 INFO L93 Difference]: Finished difference Result 2137 states and 6442 transitions. [2022-03-15 16:58:04,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:58:04,202 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:58:04,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:04,206 INFO L225 Difference]: With dead ends: 2137 [2022-03-15 16:58:04,206 INFO L226 Difference]: Without dead ends: 2129 [2022-03-15 16:58:04,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:58:04,208 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 312 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:04,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 223 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:58:04,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-03-15 16:58:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 804. [2022-03-15 16:58:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.415940224159402) internal successors, (2743), 803 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2743 transitions. [2022-03-15 16:58:04,248 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2743 transitions. Word has length 26 [2022-03-15 16:58:04,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:04,248 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 2743 transitions. [2022-03-15 16:58:04,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:04,249 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2743 transitions. [2022-03-15 16:58:04,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:58:04,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:04,250 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] [2022-03-15 16:58:04,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:04,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:04,470 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:04,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:04,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1473534255, now seen corresponding path program 17 times [2022-03-15 16:58:04,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:04,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030545222] [2022-03-15 16:58:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:04,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:04,513 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:04,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030545222] [2022-03-15 16:58:04,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030545222] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:04,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561641294] [2022-03-15 16:58:04,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:58:04,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:04,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:04,514 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:04,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:58:04,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:58:04,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:04,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:58:04,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:04,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:58:04,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561641294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:04,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:04,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:58:04,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215363117] [2022-03-15 16:58:04,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:04,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:58:04,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:04,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:58:04,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:58:04,735 INFO L87 Difference]: Start difference. First operand 804 states and 2743 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:05,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:05,463 INFO L93 Difference]: Finished difference Result 2884 states and 8879 transitions. [2022-03-15 16:58:05,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:58:05,463 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:58:05,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:05,470 INFO L225 Difference]: With dead ends: 2884 [2022-03-15 16:58:05,470 INFO L226 Difference]: Without dead ends: 2884 [2022-03-15 16:58:05,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 16:58:05,471 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 362 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:05,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 223 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:58:05,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2884 states. [2022-03-15 16:58:05,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2884 to 926. [2022-03-15 16:58:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.5945945945945947) internal successors, (3325), 925 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3325 transitions. [2022-03-15 16:58:05,510 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3325 transitions. Word has length 26 [2022-03-15 16:58:05,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:05,511 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3325 transitions. [2022-03-15 16:58:05,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:05,511 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3325 transitions. [2022-03-15 16:58:05,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:58:05,514 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:05,514 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] [2022-03-15 16:58:05,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:05,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:05,731 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:05,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:05,732 INFO L85 PathProgramCache]: Analyzing trace with hash 465961067, now seen corresponding path program 18 times [2022-03-15 16:58:05,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:05,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046540216] [2022-03-15 16:58:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:05,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:05,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:05,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046540216] [2022-03-15 16:58:05,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046540216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:05,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715196436] [2022-03-15 16:58:05,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:58:05,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:05,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:05,784 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:05,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:58:05,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:58:05,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:05,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:58:05,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:05,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:58:06,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715196436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:06,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:06,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:58:06,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888026689] [2022-03-15 16:58:06,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:06,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:58:06,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:06,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:58:06,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:58:06,020 INFO L87 Difference]: Start difference. First operand 926 states and 3325 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:06,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:06,858 INFO L93 Difference]: Finished difference Result 3162 states and 9670 transitions. [2022-03-15 16:58:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:58:06,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:58:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:06,869 INFO L225 Difference]: With dead ends: 3162 [2022-03-15 16:58:06,870 INFO L226 Difference]: Without dead ends: 3162 [2022-03-15 16:58:06,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:58:06,871 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 412 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:06,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 241 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:58:06,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2022-03-15 16:58:06,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 923. [2022-03-15 16:58:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 3.5911062906724514) internal successors, (3311), 922 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:06,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 3311 transitions. [2022-03-15 16:58:06,913 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 3311 transitions. Word has length 26 [2022-03-15 16:58:06,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:06,913 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 3311 transitions. [2022-03-15 16:58:06,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 3311 transitions. [2022-03-15 16:58:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:58:06,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:06,916 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] [2022-03-15 16:58:06,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:07,138 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,SelfDestructingSolverStorable21 [2022-03-15 16:58:07,138 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:07,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:07,138 INFO L85 PathProgramCache]: Analyzing trace with hash -654035971, now seen corresponding path program 19 times [2022-03-15 16:58:07,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:07,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199330842] [2022-03-15 16:58:07,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:07,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:07,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:07,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199330842] [2022-03-15 16:58:07,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199330842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:07,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797233772] [2022-03-15 16:58:07,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:58:07,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:07,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:07,183 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:07,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:58:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:07,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:58:07,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:07,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:07,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797233772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:07,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:07,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-15 16:58:07,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674324811] [2022-03-15 16:58:07,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:07,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:58:07,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:07,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:58:07,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:58:07,386 INFO L87 Difference]: Start difference. First operand 923 states and 3311 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:07,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:07,961 INFO L93 Difference]: Finished difference Result 2838 states and 8728 transitions. [2022-03-15 16:58:07,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:58:07,962 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:58:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:07,970 INFO L225 Difference]: With dead ends: 2838 [2022-03-15 16:58:07,970 INFO L226 Difference]: Without dead ends: 2834 [2022-03-15 16:58:07,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:58:07,972 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 327 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:07,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 198 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:58:07,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2022-03-15 16:58:08,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 929. [2022-03-15 16:58:08,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.5905172413793105) internal successors, (3332), 928 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3332 transitions. [2022-03-15 16:58:08,013 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3332 transitions. Word has length 26 [2022-03-15 16:58:08,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:08,013 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 3332 transitions. [2022-03-15 16:58:08,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:08,013 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3332 transitions. [2022-03-15 16:58:08,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:58:08,015 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:08,015 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] [2022-03-15 16:58:08,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:08,231 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,SelfDestructingSolverStorable22 [2022-03-15 16:58:08,231 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:08,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:08,232 INFO L85 PathProgramCache]: Analyzing trace with hash -383526279, now seen corresponding path program 20 times [2022-03-15 16:58:08,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:08,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691098476] [2022-03-15 16:58:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:08,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:08,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:08,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691098476] [2022-03-15 16:58:08,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691098476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:08,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059978243] [2022-03-15 16:58:08,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:58:08,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:08,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:08,273 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:08,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:58:08,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:58:08,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:08,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:58:08,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:08,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:08,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059978243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:08,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:08,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-15 16:58:08,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410027576] [2022-03-15 16:58:08,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:08,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:58:08,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:08,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:58:08,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:58:08,455 INFO L87 Difference]: Start difference. First operand 929 states and 3332 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:09,120 INFO L93 Difference]: Finished difference Result 3029 states and 9169 transitions. [2022-03-15 16:58:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:58:09,121 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:58:09,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:09,130 INFO L225 Difference]: With dead ends: 3029 [2022-03-15 16:58:09,131 INFO L226 Difference]: Without dead ends: 3029 [2022-03-15 16:58:09,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:58:09,132 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 440 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:09,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 223 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:58:09,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2022-03-15 16:58:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 925. [2022-03-15 16:58:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 3.593073593073593) internal successors, (3320), 924 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:09,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 3320 transitions. [2022-03-15 16:58:09,172 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 3320 transitions. Word has length 26 [2022-03-15 16:58:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:09,172 INFO L470 AbstractCegarLoop]: Abstraction has 925 states and 3320 transitions. [2022-03-15 16:58:09,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:09,172 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 3320 transitions. [2022-03-15 16:58:09,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:58:09,174 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:09,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:09,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:09,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:09,393 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:09,393 INFO L85 PathProgramCache]: Analyzing trace with hash 201501907, now seen corresponding path program 21 times [2022-03-15 16:58:09,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:09,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763560160] [2022-03-15 16:58:09,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:09,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:09,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:09,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763560160] [2022-03-15 16:58:09,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763560160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:09,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448788749] [2022-03-15 16:58:09,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:58:09,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:09,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:09,447 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:09,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:58:09,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:58:09,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:09,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:58:09,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:09,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:09,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:09,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448788749] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:09,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:09,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:58:09,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469929150] [2022-03-15 16:58:09,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:09,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:58:09,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:58:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:58:09,623 INFO L87 Difference]: Start difference. First operand 925 states and 3320 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:10,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:10,239 INFO L93 Difference]: Finished difference Result 2778 states and 8527 transitions. [2022-03-15 16:58:10,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 16:58:10,239 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:58:10,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:10,246 INFO L225 Difference]: With dead ends: 2778 [2022-03-15 16:58:10,247 INFO L226 Difference]: Without dead ends: 2766 [2022-03-15 16:58:10,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=508, Invalid=1748, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:58:10,248 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 274 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:10,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 206 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:58:10,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2022-03-15 16:58:10,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 943. [2022-03-15 16:58:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 3.58067940552017) internal successors, (3373), 942 states have internal predecessors, (3373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:10,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 3373 transitions. [2022-03-15 16:58:10,291 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 3373 transitions. Word has length 26 [2022-03-15 16:58:10,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:10,291 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 3373 transitions. [2022-03-15 16:58:10,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:10,292 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 3373 transitions. [2022-03-15 16:58:10,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:58:10,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:10,294 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] [2022-03-15 16:58:10,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:10,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:10,516 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:10,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:10,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1290502825, now seen corresponding path program 22 times [2022-03-15 16:58:10,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:10,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406715167] [2022-03-15 16:58:10,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:10,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:10,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:10,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406715167] [2022-03-15 16:58:10,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406715167] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:10,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770160112] [2022-03-15 16:58:10,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:58:10,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:10,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:10,561 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:10,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:58:10,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:58:10,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:10,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:58:10,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:10,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:10,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770160112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:10,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:10,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:58:10,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007312238] [2022-03-15 16:58:10,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:10,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:58:10,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:10,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:58:10,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:58:10,728 INFO L87 Difference]: Start difference. First operand 943 states and 3373 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:11,224 INFO L93 Difference]: Finished difference Result 2518 states and 7974 transitions. [2022-03-15 16:58:11,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:58:11,224 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:58:11,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:11,229 INFO L225 Difference]: With dead ends: 2518 [2022-03-15 16:58:11,229 INFO L226 Difference]: Without dead ends: 2514 [2022-03-15 16:58:11,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:58:11,230 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 309 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:11,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 147 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:58:11,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2022-03-15 16:58:11,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 993. [2022-03-15 16:58:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 3.5524193548387095) internal successors, (3524), 992 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:11,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 3524 transitions. [2022-03-15 16:58:11,263 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 3524 transitions. Word has length 26 [2022-03-15 16:58:11,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:11,263 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 3524 transitions. [2022-03-15 16:58:11,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 3524 transitions. [2022-03-15 16:58:11,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:58:11,266 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:11,266 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] [2022-03-15 16:58:11,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:11,488 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,SelfDestructingSolverStorable25 [2022-03-15 16:58:11,488 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:11,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1019993133, now seen corresponding path program 23 times [2022-03-15 16:58:11,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:11,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316633515] [2022-03-15 16:58:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:11,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:11,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:11,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316633515] [2022-03-15 16:58:11,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316633515] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:11,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012707470] [2022-03-15 16:58:11,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:58:11,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:11,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:11,531 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:11,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 16:58:11,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:58:11,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:11,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:58:11,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:11,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:11,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012707470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:11,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:11,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:58:11,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112854621] [2022-03-15 16:58:11,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:11,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:58:11,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:11,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:58:11,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:58:11,711 INFO L87 Difference]: Start difference. First operand 993 states and 3524 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:12,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:12,344 INFO L93 Difference]: Finished difference Result 2664 states and 8331 transitions. [2022-03-15 16:58:12,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:58:12,345 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:58:12,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:12,350 INFO L225 Difference]: With dead ends: 2664 [2022-03-15 16:58:12,350 INFO L226 Difference]: Without dead ends: 2664 [2022-03-15 16:58:12,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:58:12,351 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 297 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:12,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 164 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:58:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2022-03-15 16:58:12,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 983. [2022-03-15 16:58:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 3.5570264765784114) internal successors, (3493), 982 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:12,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 3493 transitions. [2022-03-15 16:58:12,379 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 3493 transitions. Word has length 26 [2022-03-15 16:58:12,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:12,379 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 3493 transitions. [2022-03-15 16:58:12,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:12,379 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 3493 transitions. [2022-03-15 16:58:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:58:12,381 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:12,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:12,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-15 16:58:12,594 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,SelfDestructingSolverStorable26 [2022-03-15 16:58:12,595 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:12,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:12,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1735381837, now seen corresponding path program 24 times [2022-03-15 16:58:12,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:12,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840759027] [2022-03-15 16:58:12,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:12,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:12,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:12,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840759027] [2022-03-15 16:58:12,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840759027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:12,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212047305] [2022-03-15 16:58:12,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:58:12,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:12,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:12,642 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:12,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 16:58:12,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:58:12,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:12,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:58:12,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:12,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:12,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212047305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:12,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:12,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:58:12,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846818947] [2022-03-15 16:58:12,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:12,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:58:12,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:12,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:58:12,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:58:12,830 INFO L87 Difference]: Start difference. First operand 983 states and 3493 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:13,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:13,425 INFO L93 Difference]: Finished difference Result 2141 states and 6857 transitions. [2022-03-15 16:58:13,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:58:13,425 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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 26 [2022-03-15 16:58:13,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:13,431 INFO L225 Difference]: With dead ends: 2141 [2022-03-15 16:58:13,431 INFO L226 Difference]: Without dead ends: 2133 [2022-03-15 16:58:13,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:58:13,431 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 263 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:13,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 178 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:58:13,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2022-03-15 16:58:13,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 984. [2022-03-15 16:58:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 3.5595116988809767) internal successors, (3499), 983 states have internal predecessors, (3499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:13,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 3499 transitions. [2022-03-15 16:58:13,457 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 3499 transitions. Word has length 26 [2022-03-15 16:58:13,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:13,457 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 3499 transitions. [2022-03-15 16:58:13,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:13,457 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 3499 transitions. [2022-03-15 16:58:13,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:58:13,459 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:13,460 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, 1, 1] [2022-03-15 16:58:13,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-15 16:58:13,672 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,SelfDestructingSolverStorable27 [2022-03-15 16:58:13,672 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash -619306999, now seen corresponding path program 3 times [2022-03-15 16:58:13,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:13,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308415561] [2022-03-15 16:58:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:13,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:13,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:13,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308415561] [2022-03-15 16:58:13,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308415561] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:13,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989417567] [2022-03-15 16:58:13,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:58:13,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:13,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:13,925 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:13,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 16:58:13,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:58:13,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:13,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:58:13,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:14,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:58:14,219 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 16:58:14,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 16:58:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:58:14,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:14,501 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 16:58:14,502 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 17 treesize of output 26 [2022-03-15 16:58:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:58:14,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989417567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:14,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:14,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-03-15 16:58:14,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449511020] [2022-03-15 16:58:14,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:14,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:58:14,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:14,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:58:14,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:58:14,685 INFO L87 Difference]: Start difference. First operand 984 states and 3499 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:16,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:16,058 INFO L93 Difference]: Finished difference Result 2741 states and 8807 transitions. [2022-03-15 16:58:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:58:16,059 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 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 28 [2022-03-15 16:58:16,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:16,066 INFO L225 Difference]: With dead ends: 2741 [2022-03-15 16:58:16,066 INFO L226 Difference]: Without dead ends: 2584 [2022-03-15 16:58:16,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=821, Invalid=4149, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 16:58:16,072 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 560 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:16,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 367 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 722 Invalid, 0 Unknown, 495 Unchecked, 0.4s Time] [2022-03-15 16:58:16,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-03-15 16:58:16,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1171. [2022-03-15 16:58:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.4752136752136753) internal successors, (4066), 1170 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 4066 transitions. [2022-03-15 16:58:16,118 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 4066 transitions. Word has length 28 [2022-03-15 16:58:16,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:16,118 INFO L470 AbstractCegarLoop]: Abstraction has 1171 states and 4066 transitions. [2022-03-15 16:58:16,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 4066 transitions. [2022-03-15 16:58:16,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:58:16,121 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:16,121 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, 1, 1] [2022-03-15 16:58:16,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:16,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 16:58:16,335 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:16,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1096873097, now seen corresponding path program 4 times [2022-03-15 16:58:16,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:16,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379352460] [2022-03-15 16:58:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:16,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:16,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:16,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379352460] [2022-03-15 16:58:16,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379352460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:16,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745376096] [2022-03-15 16:58:16,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:58:16,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:16,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:16,661 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:16,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 16:58:16,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:58:16,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:16,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:58:16,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:17,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:58:17,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:58:17,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 16:58:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:17,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:17,221 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 16:58:17,221 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 17 treesize of output 26 [2022-03-15 16:58:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:17,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745376096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:17,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:17,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-15 16:58:17,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658701173] [2022-03-15 16:58:17,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:17,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:58:17,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:17,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:58:17,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:58:17,600 INFO L87 Difference]: Start difference. First operand 1171 states and 4066 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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) [2022-03-15 16:58:19,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:19,285 INFO L93 Difference]: Finished difference Result 2434 states and 7660 transitions. [2022-03-15 16:58:19,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 16:58:19,285 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 28 [2022-03-15 16:58:19,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:19,290 INFO L225 Difference]: With dead ends: 2434 [2022-03-15 16:58:19,290 INFO L226 Difference]: Without dead ends: 2420 [2022-03-15 16:58:19,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=783, Invalid=3249, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 16:58:19,291 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 531 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:19,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 278 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 550 Invalid, 0 Unknown, 135 Unchecked, 0.3s Time] [2022-03-15 16:58:19,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2022-03-15 16:58:19,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 1228. [2022-03-15 16:58:19,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 3.493072534637327) internal successors, (4286), 1227 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:19,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 4286 transitions. [2022-03-15 16:58:19,316 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 4286 transitions. Word has length 28 [2022-03-15 16:58:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:19,316 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 4286 transitions. [2022-03-15 16:58:19,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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) [2022-03-15 16:58:19,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 4286 transitions. [2022-03-15 16:58:19,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:58:19,318 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:19,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:19,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-15 16:58:19,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:19,521 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:19,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:19,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1118800371, now seen corresponding path program 5 times [2022-03-15 16:58:19,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:19,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505604228] [2022-03-15 16:58:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:19,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:19,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:19,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505604228] [2022-03-15 16:58:19,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505604228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:19,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069401560] [2022-03-15 16:58:19,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:58:19,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:19,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:19,809 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:19,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 16:58:19,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:58:19,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:19,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:58:19,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:20,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:58:20,076 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 16:58:20,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 16:58:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:20,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:20,284 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 16:58:20,285 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 17 treesize of output 26 [2022-03-15 16:58:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:20,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069401560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:20,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:20,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-03-15 16:58:20,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698136955] [2022-03-15 16:58:20,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:20,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:58:20,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:20,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:58:20,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:58:20,534 INFO L87 Difference]: Start difference. First operand 1228 states and 4286 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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) [2022-03-15 16:58:23,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:23,884 INFO L93 Difference]: Finished difference Result 3044 states and 9116 transitions. [2022-03-15 16:58:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-15 16:58:23,885 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 28 [2022-03-15 16:58:23,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:23,890 INFO L225 Difference]: With dead ends: 3044 [2022-03-15 16:58:23,890 INFO L226 Difference]: Without dead ends: 3010 [2022-03-15 16:58:23,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5332 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2250, Invalid=11556, Unknown=0, NotChecked=0, Total=13806 [2022-03-15 16:58:23,892 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 806 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 732 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:23,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 531 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 870 Invalid, 0 Unknown, 732 Unchecked, 0.5s Time] [2022-03-15 16:58:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2022-03-15 16:58:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 1385. [2022-03-15 16:58:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1384 states have (on average 3.538294797687861) internal successors, (4897), 1384 states have internal predecessors, (4897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 4897 transitions. [2022-03-15 16:58:23,931 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 4897 transitions. Word has length 28 [2022-03-15 16:58:23,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:23,931 INFO L470 AbstractCegarLoop]: Abstraction has 1385 states and 4897 transitions. [2022-03-15 16:58:23,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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) [2022-03-15 16:58:23,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 4897 transitions. [2022-03-15 16:58:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:58:23,934 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:23,934 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:23,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:24,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:24,155 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:24,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1056275707, now seen corresponding path program 25 times [2022-03-15 16:58:24,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:24,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610355951] [2022-03-15 16:58:24,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:24,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:24,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:24,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610355951] [2022-03-15 16:58:24,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610355951] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:24,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100435356] [2022-03-15 16:58:24,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:58:24,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:24,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:24,490 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:24,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 16:58:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:24,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:58:24,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:24,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 16:58:24,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:58:24,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-03-15 16:58:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:24,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:25,033 INFO L353 Elim1Store]: treesize reduction 20, result has 31.0 percent of original size [2022-03-15 16:58:25,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 22 [2022-03-15 16:58:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:25,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100435356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:25,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:25,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2022-03-15 16:58:25,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200601459] [2022-03-15 16:58:25,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:25,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:58:25,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:25,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:58:25,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:58:25,328 INFO L87 Difference]: Start difference. First operand 1385 states and 4897 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:29,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:29,558 INFO L93 Difference]: Finished difference Result 2663 states and 8706 transitions. [2022-03-15 16:58:29,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-15 16:58:29,558 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 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 28 [2022-03-15 16:58:29,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:29,564 INFO L225 Difference]: With dead ends: 2663 [2022-03-15 16:58:29,564 INFO L226 Difference]: Without dead ends: 2636 [2022-03-15 16:58:29,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4309 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1806, Invalid=11304, Unknown=0, NotChecked=0, Total=13110 [2022-03-15 16:58:29,565 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 564 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:29,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 419 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1923 Invalid, 0 Unknown, 68 Unchecked, 0.9s Time] [2022-03-15 16:58:29,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2022-03-15 16:58:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 1620. [2022-03-15 16:58:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.449042618900556) internal successors, (5584), 1619 states have internal predecessors, (5584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5584 transitions. [2022-03-15 16:58:29,604 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5584 transitions. Word has length 28 [2022-03-15 16:58:29,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:29,604 INFO L470 AbstractCegarLoop]: Abstraction has 1620 states and 5584 transitions. [2022-03-15 16:58:29,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5584 transitions. [2022-03-15 16:58:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:58:29,608 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:29,608 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, 1, 1] [2022-03-15 16:58:29,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-15 16:58:29,828 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,SelfDestructingSolverStorable31 [2022-03-15 16:58:29,828 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:29,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:29,829 INFO L85 PathProgramCache]: Analyzing trace with hash -418897327, now seen corresponding path program 6 times [2022-03-15 16:58:29,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:29,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812985834] [2022-03-15 16:58:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:29,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:30,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:30,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812985834] [2022-03-15 16:58:30,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812985834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:30,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769279363] [2022-03-15 16:58:30,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:58:30,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:30,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:30,141 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:30,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 16:58:30,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:58:30,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:30,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:58:30,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:30,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:58:30,424 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 16:58:30,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 16:58:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:58:30,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:30,611 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 16:58:30,611 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 17 treesize of output 26 [2022-03-15 16:58:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:58:30,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769279363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:30,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:30,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-03-15 16:58:30,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804528046] [2022-03-15 16:58:30,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:30,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:58:30,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:30,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:58:30,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:58:30,799 INFO L87 Difference]: Start difference. First operand 1620 states and 5584 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:32,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:32,262 INFO L93 Difference]: Finished difference Result 2371 states and 7702 transitions. [2022-03-15 16:58:32,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:58:32,263 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 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 28 [2022-03-15 16:58:32,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:32,268 INFO L225 Difference]: With dead ends: 2371 [2022-03-15 16:58:32,268 INFO L226 Difference]: Without dead ends: 2357 [2022-03-15 16:58:32,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=576, Invalid=2846, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 16:58:32,269 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 375 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 530 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:32,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 353 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 609 Invalid, 0 Unknown, 530 Unchecked, 0.3s Time] [2022-03-15 16:58:32,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2022-03-15 16:58:32,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 1669. [2022-03-15 16:58:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.4502398081534773) internal successors, (5755), 1668 states have internal predecessors, (5755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:32,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5755 transitions. [2022-03-15 16:58:32,309 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5755 transitions. Word has length 28 [2022-03-15 16:58:32,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:32,309 INFO L470 AbstractCegarLoop]: Abstraction has 1669 states and 5755 transitions. [2022-03-15 16:58:32,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:32,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5755 transitions. [2022-03-15 16:58:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:58:32,313 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:32,313 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:32,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:32,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:32,536 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:32,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:32,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1851738833, now seen corresponding path program 26 times [2022-03-15 16:58:32,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:32,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091567920] [2022-03-15 16:58:32,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:32,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:32,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:32,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091567920] [2022-03-15 16:58:32,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091567920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:32,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219698839] [2022-03-15 16:58:32,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:58:32,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:32,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:32,816 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:32,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 16:58:32,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:58:32,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:32,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:58:32,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:32,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:58:33,046 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 16:58:33,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 16:58:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:58:33,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:33,382 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 16:58:33,382 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 17 treesize of output 26 [2022-03-15 16:58:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:58:33,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219698839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:33,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:33,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-03-15 16:58:33,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800415184] [2022-03-15 16:58:33,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:33,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:58:33,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:33,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:58:33,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:58:33,602 INFO L87 Difference]: Start difference. First operand 1669 states and 5755 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:44,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:44,990 INFO L93 Difference]: Finished difference Result 5759 states and 17999 transitions. [2022-03-15 16:58:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-03-15 16:58:44,991 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 16:58:44,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:45,001 INFO L225 Difference]: With dead ends: 5759 [2022-03-15 16:58:45,001 INFO L226 Difference]: Without dead ends: 5521 [2022-03-15 16:58:45,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24477 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=6244, Invalid=49688, Unknown=0, NotChecked=0, Total=55932 [2022-03-15 16:58:45,003 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 891 mSDsluCounter, 1625 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 5007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3320 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:45,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 919 Invalid, 5007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1475 Invalid, 0 Unknown, 3320 Unchecked, 0.9s Time] [2022-03-15 16:58:45,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5521 states. [2022-03-15 16:58:45,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5521 to 2289. [2022-03-15 16:58:45,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2289 states, 2288 states have (on average 3.513986013986014) internal successors, (8040), 2288 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:45,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 8040 transitions. [2022-03-15 16:58:45,060 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 8040 transitions. Word has length 28 [2022-03-15 16:58:45,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:45,060 INFO L470 AbstractCegarLoop]: Abstraction has 2289 states and 8040 transitions. [2022-03-15 16:58:45,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:45,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 8040 transitions. [2022-03-15 16:58:45,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:58:45,065 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:45,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:45,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:45,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:45,279 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:45,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:45,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1976681611, now seen corresponding path program 7 times [2022-03-15 16:58:45,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:45,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277378469] [2022-03-15 16:58:45,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:45,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:45,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:45,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277378469] [2022-03-15 16:58:45,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277378469] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:45,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282117468] [2022-03-15 16:58:45,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:58:45,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:45,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:45,619 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:45,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 16:58:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:45,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:58:45,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:45,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:58:45,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:58:45,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 16:58:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:46,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:46,079 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 16:58:46,080 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 17 treesize of output 26 [2022-03-15 16:58:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:46,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282117468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:46,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:46,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-15 16:58:46,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250671198] [2022-03-15 16:58:46,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:46,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:58:46,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:46,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:58:46,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:58:46,398 INFO L87 Difference]: Start difference. First operand 2289 states and 8040 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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) [2022-03-15 16:58:48,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:48,275 INFO L93 Difference]: Finished difference Result 4514 states and 14306 transitions. [2022-03-15 16:58:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:58:48,275 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 28 [2022-03-15 16:58:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:48,282 INFO L225 Difference]: With dead ends: 4514 [2022-03-15 16:58:48,282 INFO L226 Difference]: Without dead ends: 3964 [2022-03-15 16:58:48,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=802, Invalid=3358, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 16:58:48,282 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 542 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:48,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 291 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 794 Invalid, 0 Unknown, 328 Unchecked, 0.5s Time] [2022-03-15 16:58:48,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3964 states. [2022-03-15 16:58:48,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3964 to 2294. [2022-03-15 16:58:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 3.4888791975577846) internal successors, (8000), 2293 states have internal predecessors, (8000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 8000 transitions. [2022-03-15 16:58:48,324 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 8000 transitions. Word has length 28 [2022-03-15 16:58:48,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:48,324 INFO L470 AbstractCegarLoop]: Abstraction has 2294 states and 8000 transitions. [2022-03-15 16:58:48,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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) [2022-03-15 16:58:48,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 8000 transitions. [2022-03-15 16:58:48,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:58:48,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:48,329 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, 1, 1] [2022-03-15 16:58:48,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-15 16:58:48,529 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,SelfDestructingSolverStorable34 [2022-03-15 16:58:48,530 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:48,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:48,530 INFO L85 PathProgramCache]: Analyzing trace with hash 114975881, now seen corresponding path program 8 times [2022-03-15 16:58:48,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:48,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705092882] [2022-03-15 16:58:48,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:48,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:48,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:48,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705092882] [2022-03-15 16:58:48,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705092882] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:48,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636479138] [2022-03-15 16:58:48,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:58:48,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:48,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:48,858 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:48,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 16:58:48,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:58:48,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:48,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:58:48,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:49,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:58:49,123 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 16:58:49,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 16:58:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:58:49,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:49,335 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 16:58:49,335 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 17 treesize of output 26 [2022-03-15 16:58:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:58:49,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636479138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:49,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:49,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-03-15 16:58:49,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166051820] [2022-03-15 16:58:49,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:49,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:58:49,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:49,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:58:49,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:58:49,507 INFO L87 Difference]: Start difference. First operand 2294 states and 8000 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:50,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:50,974 INFO L93 Difference]: Finished difference Result 3130 states and 10228 transitions. [2022-03-15 16:58:50,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:58:50,974 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 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 28 [2022-03-15 16:58:50,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:50,981 INFO L225 Difference]: With dead ends: 3130 [2022-03-15 16:58:50,982 INFO L226 Difference]: Without dead ends: 3112 [2022-03-15 16:58:50,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=586, Invalid=2954, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 16:58:50,982 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 408 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 552 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:50,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 354 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 582 Invalid, 0 Unknown, 552 Unchecked, 0.3s Time] [2022-03-15 16:58:50,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2022-03-15 16:58:51,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2324. [2022-03-15 16:58:51,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 3.484287559190702) internal successors, (8094), 2323 states have internal predecessors, (8094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:51,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 8094 transitions. [2022-03-15 16:58:51,031 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 8094 transitions. Word has length 28 [2022-03-15 16:58:51,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:51,032 INFO L470 AbstractCegarLoop]: Abstraction has 2324 states and 8094 transitions. [2022-03-15 16:58:51,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 8094 transitions. [2022-03-15 16:58:51,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:58:51,037 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:51,037 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, 1, 1] [2022-03-15 16:58:51,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:51,260 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,SelfDestructingSolverStorable35 [2022-03-15 16:58:51,260 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:51,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:51,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1675136757, now seen corresponding path program 9 times [2022-03-15 16:58:51,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:51,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684679600] [2022-03-15 16:58:51,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:51,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:51,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:51,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684679600] [2022-03-15 16:58:51,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684679600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:51,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286411128] [2022-03-15 16:58:51,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:58:51,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:51,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:51,538 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:51,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 16:58:51,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:58:51,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:51,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:58:51,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:51,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:58:51,829 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 16:58:51,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 16:58:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:58:52,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:52,159 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 16:58:52,159 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 17 treesize of output 26 [2022-03-15 16:58:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:58:52,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286411128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:52,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:52,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-03-15 16:58:52,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832935711] [2022-03-15 16:58:52,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:52,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:58:52,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:52,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:58:52,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:58:52,333 INFO L87 Difference]: Start difference. First operand 2324 states and 8094 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:53,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:53,899 INFO L93 Difference]: Finished difference Result 3157 states and 10316 transitions. [2022-03-15 16:58:53,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:58:53,900 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 16:58:53,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:53,905 INFO L225 Difference]: With dead ends: 3157 [2022-03-15 16:58:53,906 INFO L226 Difference]: Without dead ends: 3121 [2022-03-15 16:58:53,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=540, Invalid=2766, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:58:53,906 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 389 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 947 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:53,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 359 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 595 Invalid, 0 Unknown, 947 Unchecked, 0.3s Time] [2022-03-15 16:58:53,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2022-03-15 16:58:53,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2355. [2022-03-15 16:58:53,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.4766355140186915) internal successors, (8184), 2354 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 8184 transitions. [2022-03-15 16:58:53,943 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 8184 transitions. Word has length 28 [2022-03-15 16:58:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:53,943 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 8184 transitions. [2022-03-15 16:58:53,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 8184 transitions. [2022-03-15 16:58:53,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:58:53,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:53,948 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, 1, 1] [2022-03-15 16:58:53,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-15 16:58:54,148 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,SelfDestructingSolverStorable36 [2022-03-15 16:58:54,148 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:54,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1315804659, now seen corresponding path program 10 times [2022-03-15 16:58:54,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:54,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71137299] [2022-03-15 16:58:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:54,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:54,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:54,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71137299] [2022-03-15 16:58:54,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71137299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:54,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485267204] [2022-03-15 16:58:54,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:58:54,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:54,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:54,418 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:54,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 16:58:54,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:58:54,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:54,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:58:54,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:54,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:58:54,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:58:54,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 16:58:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:54,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:54,910 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 16:58:54,910 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 17 treesize of output 26 [2022-03-15 16:58:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:55,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485267204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:55,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:55,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-15 16:58:55,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255275633] [2022-03-15 16:58:55,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:55,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:58:55,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:55,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:58:55,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:58:55,220 INFO L87 Difference]: Start difference. First operand 2355 states and 8184 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:57,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:57,608 INFO L93 Difference]: Finished difference Result 5240 states and 16371 transitions. [2022-03-15 16:58:57,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:58:57,609 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 28 [2022-03-15 16:58:57,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:57,618 INFO L225 Difference]: With dead ends: 5240 [2022-03-15 16:58:57,618 INFO L226 Difference]: Without dead ends: 5044 [2022-03-15 16:58:57,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1726 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1015, Invalid=4241, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 16:58:57,619 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 707 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:57,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 309 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 888 Invalid, 0 Unknown, 171 Unchecked, 0.5s Time] [2022-03-15 16:58:57,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5044 states. [2022-03-15 16:58:57,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5044 to 2447. [2022-03-15 16:58:57,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2446 states have (on average 3.4603434178250203) internal successors, (8464), 2446 states have internal predecessors, (8464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 8464 transitions. [2022-03-15 16:58:57,670 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 8464 transitions. Word has length 28 [2022-03-15 16:58:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:57,670 INFO L470 AbstractCegarLoop]: Abstraction has 2447 states and 8464 transitions. [2022-03-15 16:58:57,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 8464 transitions. [2022-03-15 16:58:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:58:57,675 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:57,675 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, 1, 1] [2022-03-15 16:58:57,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-15 16:58:57,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:57,875 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:58:57,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:57,876 INFO L85 PathProgramCache]: Analyzing trace with hash 114198423, now seen corresponding path program 11 times [2022-03-15 16:58:57,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:57,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773399497] [2022-03-15 16:58:57,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:57,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:58,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:58,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773399497] [2022-03-15 16:58:58,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773399497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:58,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307203536] [2022-03-15 16:58:58,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:58:58,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:58,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:58,149 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:58,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 16:58:58,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:58:58,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:58,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:58:58,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:58,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:58:58,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:58:58,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 16:58:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:58,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:58,643 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 16:58:58,644 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 17 treesize of output 26 [2022-03-15 16:58:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:58,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307203536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:58,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:58,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-03-15 16:58:58,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489566050] [2022-03-15 16:58:58,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:58,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:58:58,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:58,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:58:58,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:58:58,983 INFO L87 Difference]: Start difference. First operand 2447 states and 8464 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 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) [2022-03-15 16:59:01,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:01,855 INFO L93 Difference]: Finished difference Result 4592 states and 14339 transitions. [2022-03-15 16:59:01,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 16:59:01,855 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 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 28 [2022-03-15 16:59:01,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:01,862 INFO L225 Difference]: With dead ends: 4592 [2022-03-15 16:59:01,863 INFO L226 Difference]: Without dead ends: 3982 [2022-03-15 16:59:01,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1266, Invalid=7290, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 16:59:01,863 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 539 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:01,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 450 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1311 Invalid, 0 Unknown, 105 Unchecked, 0.6s Time] [2022-03-15 16:59:01,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3982 states. [2022-03-15 16:59:01,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3982 to 2437. [2022-03-15 16:59:01,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2437 states, 2436 states have (on average 3.4564860426929394) internal successors, (8420), 2436 states have internal predecessors, (8420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:01,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 8420 transitions. [2022-03-15 16:59:01,907 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 8420 transitions. Word has length 28 [2022-03-15 16:59:01,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:01,907 INFO L470 AbstractCegarLoop]: Abstraction has 2437 states and 8420 transitions. [2022-03-15 16:59:01,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 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) [2022-03-15 16:59:01,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 8420 transitions. [2022-03-15 16:59:01,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:59:01,912 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:01,912 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, 1, 1] [2022-03-15 16:59:01,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 16:59:02,112 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,SelfDestructingSolverStorable38 [2022-03-15 16:59:02,113 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:59:02,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:02,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1910068349, now seen corresponding path program 12 times [2022-03-15 16:59:02,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:02,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879864221] [2022-03-15 16:59:02,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:02,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:02,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:02,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879864221] [2022-03-15 16:59:02,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879864221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:02,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141121542] [2022-03-15 16:59:02,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:59:02,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:02,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:02,538 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:02,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 16:59:02,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:59:02,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:02,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:59:02,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:02,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:59:02,799 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 16:59:02,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 16:59:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:59:02,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:03,047 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 16:59:03,047 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 17 treesize of output 26 [2022-03-15 16:59:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:59:03,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141121542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:03,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:03,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-03-15 16:59:03,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959036874] [2022-03-15 16:59:03,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:03,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:59:03,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:03,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:59:03,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:59:03,205 INFO L87 Difference]: Start difference. First operand 2437 states and 8420 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:05,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:05,348 INFO L93 Difference]: Finished difference Result 5107 states and 16349 transitions. [2022-03-15 16:59:05,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 16:59:05,349 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 16:59:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:05,358 INFO L225 Difference]: With dead ends: 5107 [2022-03-15 16:59:05,358 INFO L226 Difference]: Without dead ends: 5003 [2022-03-15 16:59:05,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=898, Invalid=4214, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 16:59:05,359 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 535 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:05,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 291 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1254 Invalid, 0 Unknown, 213 Unchecked, 0.6s Time] [2022-03-15 16:59:05,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5003 states. [2022-03-15 16:59:05,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5003 to 2590. [2022-03-15 16:59:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2590 states, 2589 states have (on average 3.467361915797605) internal successors, (8977), 2589 states have internal predecessors, (8977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:05,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2590 states to 2590 states and 8977 transitions. [2022-03-15 16:59:05,411 INFO L78 Accepts]: Start accepts. Automaton has 2590 states and 8977 transitions. Word has length 28 [2022-03-15 16:59:05,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:05,411 INFO L470 AbstractCegarLoop]: Abstraction has 2590 states and 8977 transitions. [2022-03-15 16:59:05,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:05,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2590 states and 8977 transitions. [2022-03-15 16:59:05,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:59:05,416 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:05,417 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, 1, 1] [2022-03-15 16:59:05,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-15 16:59:05,617 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,SelfDestructingSolverStorable39 [2022-03-15 16:59:05,617 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:59:05,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:05,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1658751993, now seen corresponding path program 13 times [2022-03-15 16:59:05,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:05,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048005656] [2022-03-15 16:59:05,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:05,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:05,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:05,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048005656] [2022-03-15 16:59:05,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048005656] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:05,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278048218] [2022-03-15 16:59:05,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:59:05,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:05,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:05,926 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:05,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 16:59:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:05,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:59:05,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:06,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:59:06,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:59:06,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 16:59:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:06,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:06,443 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 16:59:06,444 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 17 treesize of output 26 [2022-03-15 16:59:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:06,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278048218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:06,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:06,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-15 16:59:06,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458247498] [2022-03-15 16:59:06,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:06,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:59:06,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:06,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:59:06,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:59:06,758 INFO L87 Difference]: Start difference. First operand 2590 states and 8977 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:11,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:11,301 INFO L93 Difference]: Finished difference Result 7272 states and 22400 transitions. [2022-03-15 16:59:11,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-15 16:59:11,301 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 28 [2022-03-15 16:59:11,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:11,312 INFO L225 Difference]: With dead ends: 7272 [2022-03-15 16:59:11,313 INFO L226 Difference]: Without dead ends: 6253 [2022-03-15 16:59:11,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4695 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2043, Invalid=9729, Unknown=0, NotChecked=0, Total=11772 [2022-03-15 16:59:11,313 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 751 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 437 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:11,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 590 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1320 Invalid, 0 Unknown, 437 Unchecked, 0.7s Time] [2022-03-15 16:59:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2022-03-15 16:59:11,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 2336. [2022-03-15 16:59:11,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 3.5190578158458243) internal successors, (8217), 2335 states have internal predecessors, (8217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:11,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 8217 transitions. [2022-03-15 16:59:11,371 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 8217 transitions. Word has length 28 [2022-03-15 16:59:11,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:11,372 INFO L470 AbstractCegarLoop]: Abstraction has 2336 states and 8217 transitions. [2022-03-15 16:59:11,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:11,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 8217 transitions. [2022-03-15 16:59:11,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:59:11,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:11,376 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, 1, 1] [2022-03-15 16:59:11,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-15 16:59:11,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:11,577 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:59:11,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:11,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1985955337, now seen corresponding path program 14 times [2022-03-15 16:59:11,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:11,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44987198] [2022-03-15 16:59:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:11,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:11,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:11,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44987198] [2022-03-15 16:59:11,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44987198] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:11,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535253000] [2022-03-15 16:59:11,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:59:11,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:11,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:11,796 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:11,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 16:59:11,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:59:11,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:11,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:59:11,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:12,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:59:12,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:59:12,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 16:59:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:12,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:12,306 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 16:59:12,306 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 17 treesize of output 26 [2022-03-15 16:59:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:12,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535253000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:12,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:12,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2022-03-15 16:59:12,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088261632] [2022-03-15 16:59:12,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:12,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:59:12,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:12,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:59:12,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:59:12,605 INFO L87 Difference]: Start difference. First operand 2336 states and 8217 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 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) [2022-03-15 16:59:17,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:17,588 INFO L93 Difference]: Finished difference Result 6744 states and 20808 transitions. [2022-03-15 16:59:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-15 16:59:17,589 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 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 28 [2022-03-15 16:59:17,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:17,598 INFO L225 Difference]: With dead ends: 6744 [2022-03-15 16:59:17,598 INFO L226 Difference]: Without dead ends: 6046 [2022-03-15 16:59:17,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3961 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1746, Invalid=10026, Unknown=0, NotChecked=0, Total=11772 [2022-03-15 16:59:17,599 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 707 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 1947 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 2316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:17,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 501 Invalid, 2316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1947 Invalid, 0 Unknown, 215 Unchecked, 1.0s Time] [2022-03-15 16:59:17,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6046 states. [2022-03-15 16:59:17,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6046 to 2663. [2022-03-15 16:59:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 3.477460555972953) internal successors, (9257), 2662 states have internal predecessors, (9257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 9257 transitions. [2022-03-15 16:59:17,681 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 9257 transitions. Word has length 28 [2022-03-15 16:59:17,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:17,682 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 9257 transitions. [2022-03-15 16:59:17,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 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) [2022-03-15 16:59:17,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 9257 transitions. [2022-03-15 16:59:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:59:17,688 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:17,688 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, 1, 1] [2022-03-15 16:59:17,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 16:59:17,910 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,SelfDestructingSolverStorable41 [2022-03-15 16:59:17,911 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:59:17,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:17,911 INFO L85 PathProgramCache]: Analyzing trace with hash 343870545, now seen corresponding path program 15 times [2022-03-15 16:59:17,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:17,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973029779] [2022-03-15 16:59:17,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:17,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:18,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:18,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973029779] [2022-03-15 16:59:18,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973029779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:18,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366965759] [2022-03-15 16:59:18,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:59:18,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:18,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:18,355 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:18,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 16:59:18,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:59:18,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:18,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:59:18,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:18,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:59:18,620 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-03-15 16:59:18,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-03-15 16:59:18,709 INFO L353 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-03-15 16:59:18,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2022-03-15 16:59:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:18,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:19,005 INFO L353 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-03-15 16:59:19,005 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 20 treesize of output 34 [2022-03-15 16:59:19,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:59:19,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2022-03-15 16:59:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:19,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366965759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:19,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:19,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-03-15 16:59:19,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318370134] [2022-03-15 16:59:19,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:19,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:59:19,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:19,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:59:19,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:59:19,297 INFO L87 Difference]: Start difference. First operand 2663 states and 9257 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 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) [2022-03-15 16:59:22,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:22,414 INFO L93 Difference]: Finished difference Result 5559 states and 18294 transitions. [2022-03-15 16:59:22,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 16:59:22,415 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 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 28 [2022-03-15 16:59:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:22,425 INFO L225 Difference]: With dead ends: 5559 [2022-03-15 16:59:22,425 INFO L226 Difference]: Without dead ends: 5190 [2022-03-15 16:59:22,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=721, Invalid=4681, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:59:22,426 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 492 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 512 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:22,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 526 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1698 Invalid, 0 Unknown, 512 Unchecked, 0.9s Time] [2022-03-15 16:59:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2022-03-15 16:59:22,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 3152. [2022-03-15 16:59:22,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 3151 states have (on average 3.502697556331323) internal successors, (11037), 3151 states have internal predecessors, (11037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 11037 transitions. [2022-03-15 16:59:22,507 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 11037 transitions. Word has length 28 [2022-03-15 16:59:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:22,507 INFO L470 AbstractCegarLoop]: Abstraction has 3152 states and 11037 transitions. [2022-03-15 16:59:22,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 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) [2022-03-15 16:59:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 11037 transitions. [2022-03-15 16:59:22,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:59:22,516 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:22,516 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, 1, 1] [2022-03-15 16:59:22,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-15 16:59:22,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:22,731 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:59:22,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:22,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1015948307, now seen corresponding path program 16 times [2022-03-15 16:59:22,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:22,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394996166] [2022-03-15 16:59:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:22,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:23,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:23,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394996166] [2022-03-15 16:59:23,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394996166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:23,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860580982] [2022-03-15 16:59:23,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:59:23,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:23,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:23,050 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:23,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 16:59:23,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:59:23,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:23,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:59:23,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:23,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:59:23,314 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 16:59:23,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 16:59:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:59:23,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:23,438 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 16:59:23,438 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 17 treesize of output 26 [2022-03-15 16:59:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:59:23,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860580982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:23,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:23,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 26 [2022-03-15 16:59:23,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074942053] [2022-03-15 16:59:23,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:23,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:59:23,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:23,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:59:23,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:59:23,651 INFO L87 Difference]: Start difference. First operand 3152 states and 11037 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 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) [2022-03-15 16:59:24,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:24,380 INFO L93 Difference]: Finished difference Result 6285 states and 20866 transitions. [2022-03-15 16:59:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 16:59:24,380 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 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 28 [2022-03-15 16:59:24,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:24,392 INFO L225 Difference]: With dead ends: 6285 [2022-03-15 16:59:24,392 INFO L226 Difference]: Without dead ends: 6055 [2022-03-15 16:59:24,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:59:24,393 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 323 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:24,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 257 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 463 Invalid, 0 Unknown, 558 Unchecked, 0.2s Time] [2022-03-15 16:59:24,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6055 states. [2022-03-15 16:59:24,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6055 to 3620. [2022-03-15 16:59:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 3.4995855208621167) internal successors, (12665), 3619 states have internal predecessors, (12665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:24,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 12665 transitions. [2022-03-15 16:59:24,469 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 12665 transitions. Word has length 28 [2022-03-15 16:59:24,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:24,470 INFO L470 AbstractCegarLoop]: Abstraction has 3620 states and 12665 transitions. [2022-03-15 16:59:24,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 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) [2022-03-15 16:59:24,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 12665 transitions. [2022-03-15 16:59:24,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:59:24,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:24,479 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, 1, 1] [2022-03-15 16:59:24,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-15 16:59:24,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:24,690 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:59:24,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:24,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1605273733, now seen corresponding path program 17 times [2022-03-15 16:59:24,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:24,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540088040] [2022-03-15 16:59:24,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:24,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:25,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:25,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540088040] [2022-03-15 16:59:25,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540088040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:25,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131683704] [2022-03-15 16:59:25,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:59:25,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:25,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:25,032 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:25,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 16:59:25,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:59:25,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:25,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:59:25,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:25,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:59:25,316 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 16:59:25,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 16:59:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:59:25,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:25,450 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 16:59:25,450 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 17 treesize of output 26 [2022-03-15 16:59:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:59:25,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131683704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:25,629 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:25,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 26 [2022-03-15 16:59:25,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258304535] [2022-03-15 16:59:25,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:25,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:59:25,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:25,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:59:25,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:59:25,630 INFO L87 Difference]: Start difference. First operand 3620 states and 12665 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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) [2022-03-15 16:59:26,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:26,415 INFO L93 Difference]: Finished difference Result 6620 states and 22064 transitions. [2022-03-15 16:59:26,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:59:26,415 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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 28 [2022-03-15 16:59:26,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:26,429 INFO L225 Difference]: With dead ends: 6620 [2022-03-15 16:59:26,429 INFO L226 Difference]: Without dead ends: 6238 [2022-03-15 16:59:26,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=347, Invalid=1723, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:59:26,430 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 296 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:26,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 338 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 563 Invalid, 0 Unknown, 408 Unchecked, 0.3s Time] [2022-03-15 16:59:26,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2022-03-15 16:59:26,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 3748. [2022-03-15 16:59:26,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3747 states have (on average 3.493461435815319) internal successors, (13090), 3747 states have internal predecessors, (13090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 13090 transitions. [2022-03-15 16:59:26,518 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 13090 transitions. Word has length 28 [2022-03-15 16:59:26,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:26,518 INFO L470 AbstractCegarLoop]: Abstraction has 3748 states and 13090 transitions. [2022-03-15 16:59:26,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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) [2022-03-15 16:59:26,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 13090 transitions. [2022-03-15 16:59:26,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:59:26,525 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:26,525 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, 1, 1] [2022-03-15 16:59:26,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-15 16:59:26,737 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,SelfDestructingSolverStorable44 [2022-03-15 16:59:26,737 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:59:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:26,738 INFO L85 PathProgramCache]: Analyzing trace with hash 931718669, now seen corresponding path program 18 times [2022-03-15 16:59:26,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:26,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578109217] [2022-03-15 16:59:26,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:26,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:27,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:27,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578109217] [2022-03-15 16:59:27,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578109217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:27,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988602078] [2022-03-15 16:59:27,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:59:27,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:27,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:27,039 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:27,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 16:59:27,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:59:27,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:27,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:59:27,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:27,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:59:27,282 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 16:59:27,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 16:59:27,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:59:27,405 INFO L353 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-03-15 16:59:27,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 16:59:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:27,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:27,734 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-03-15 16:59:27,734 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 22 treesize of output 48 [2022-03-15 16:59:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:28,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988602078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:28,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:28,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-03-15 16:59:28,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372844965] [2022-03-15 16:59:28,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:28,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:59:28,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:28,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:59:28,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:59:28,100 INFO L87 Difference]: Start difference. First operand 3748 states and 13090 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:33,103 INFO L93 Difference]: Finished difference Result 7139 states and 22944 transitions. [2022-03-15 16:59:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-15 16:59:33,104 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 16:59:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:33,116 INFO L225 Difference]: With dead ends: 7139 [2022-03-15 16:59:33,116 INFO L226 Difference]: Without dead ends: 6600 [2022-03-15 16:59:33,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5129 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2276, Invalid=12244, Unknown=0, NotChecked=0, Total=14520 [2022-03-15 16:59:33,118 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 573 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1051 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:33,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 660 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1713 Invalid, 0 Unknown, 1051 Unchecked, 0.9s Time] [2022-03-15 16:59:33,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6600 states. [2022-03-15 16:59:33,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6600 to 3868. [2022-03-15 16:59:33,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3868 states, 3867 states have (on average 3.507887251099043) internal successors, (13565), 3867 states have internal predecessors, (13565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3868 states to 3868 states and 13565 transitions. [2022-03-15 16:59:33,205 INFO L78 Accepts]: Start accepts. Automaton has 3868 states and 13565 transitions. Word has length 28 [2022-03-15 16:59:33,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:33,205 INFO L470 AbstractCegarLoop]: Abstraction has 3868 states and 13565 transitions. [2022-03-15 16:59:33,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:33,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3868 states and 13565 transitions. [2022-03-15 16:59:33,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:33,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:33,213 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:33,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-15 16:59:33,413 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,SelfDestructingSolverStorable45 [2022-03-15 16:59:33,413 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:59:33,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:33,414 INFO L85 PathProgramCache]: Analyzing trace with hash 246162663, now seen corresponding path program 19 times [2022-03-15 16:59:33,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:33,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273248164] [2022-03-15 16:59:33,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:33,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:33,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:33,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273248164] [2022-03-15 16:59:33,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273248164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:33,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619064466] [2022-03-15 16:59:33,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:59:33,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:33,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:33,481 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:33,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 16:59:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:33,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:59:33,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:33,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:33,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619064466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:33,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:33,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:59:33,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630546747] [2022-03-15 16:59:33,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:33,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:59:33,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:33,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:59:33,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:59:33,784 INFO L87 Difference]: Start difference. First operand 3868 states and 13565 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:39,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:39,499 INFO L93 Difference]: Finished difference Result 16600 states and 52297 transitions. [2022-03-15 16:59:39,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-03-15 16:59:39,500 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:39,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:39,538 INFO L225 Difference]: With dead ends: 16600 [2022-03-15 16:59:39,538 INFO L226 Difference]: Without dead ends: 16600 [2022-03-15 16:59:39,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33128 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=12100, Invalid=60530, Unknown=0, NotChecked=0, Total=72630 [2022-03-15 16:59:39,542 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 1105 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 2526 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 2747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 2526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:39,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1105 Valid, 748 Invalid, 2747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 2526 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:59:39,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16600 states. [2022-03-15 16:59:39,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16600 to 4468. [2022-03-15 16:59:39,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4468 states, 4467 states have (on average 3.640250727557645) internal successors, (16261), 4467 states have internal predecessors, (16261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:39,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4468 states to 4468 states and 16261 transitions. [2022-03-15 16:59:39,787 INFO L78 Accepts]: Start accepts. Automaton has 4468 states and 16261 transitions. Word has length 30 [2022-03-15 16:59:39,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:39,787 INFO L470 AbstractCegarLoop]: Abstraction has 4468 states and 16261 transitions. [2022-03-15 16:59:39,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:39,788 INFO L276 IsEmpty]: Start isEmpty. Operand 4468 states and 16261 transitions. [2022-03-15 16:59:39,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:39,797 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:39,797 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:39,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-15 16:59:39,997 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,SelfDestructingSolverStorable46 [2022-03-15 16:59:39,997 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:59:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:39,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1683112665, now seen corresponding path program 20 times [2022-03-15 16:59:39,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:39,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218002141] [2022-03-15 16:59:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:39,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:40,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:40,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218002141] [2022-03-15 16:59:40,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218002141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:40,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866466898] [2022-03-15 16:59:40,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:59:40,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:40,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:40,062 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:40,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 16:59:40,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:59:40,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:40,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:59:40,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:40,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:40,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866466898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:40,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:40,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 16:59:40,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287773082] [2022-03-15 16:59:40,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:40,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:59:40,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:40,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:59:40,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:59:40,456 INFO L87 Difference]: Start difference. First operand 4468 states and 16261 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:45,638 INFO L93 Difference]: Finished difference Result 16854 states and 52503 transitions. [2022-03-15 16:59:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2022-03-15 16:59:45,639 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:45,674 INFO L225 Difference]: With dead ends: 16854 [2022-03-15 16:59:45,674 INFO L226 Difference]: Without dead ends: 16854 [2022-03-15 16:59:45,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27212 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=10717, Invalid=49063, Unknown=0, NotChecked=0, Total=59780 [2022-03-15 16:59:45,677 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1209 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 2199 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 2199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:45,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1209 Valid, 766 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 2199 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:59:45,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16854 states. [2022-03-15 16:59:45,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16854 to 4392. [2022-03-15 16:59:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4392 states, 4391 states have (on average 3.6178547028011843) internal successors, (15886), 4391 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:45,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4392 states to 4392 states and 15886 transitions. [2022-03-15 16:59:45,842 INFO L78 Accepts]: Start accepts. Automaton has 4392 states and 15886 transitions. Word has length 30 [2022-03-15 16:59:45,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:45,842 INFO L470 AbstractCegarLoop]: Abstraction has 4392 states and 15886 transitions. [2022-03-15 16:59:45,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:45,842 INFO L276 IsEmpty]: Start isEmpty. Operand 4392 states and 15886 transitions. [2022-03-15 16:59:45,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:45,850 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:45,850 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:45,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-15 16:59:46,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:46,051 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:59:46,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:46,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1395922129, now seen corresponding path program 21 times [2022-03-15 16:59:46,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:46,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868923287] [2022-03-15 16:59:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:46,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:46,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:46,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868923287] [2022-03-15 16:59:46,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868923287] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:46,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731757647] [2022-03-15 16:59:46,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:59:46,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:46,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:46,102 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:46,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 16:59:46,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:59:46,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:46,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:59:46,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:46,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:46,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731757647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:46,372 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:46,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 16:59:46,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489445013] [2022-03-15 16:59:46,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:46,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:59:46,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:46,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:59:46,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:59:46,373 INFO L87 Difference]: Start difference. First operand 4392 states and 15886 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:49,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:49,385 INFO L93 Difference]: Finished difference Result 12242 states and 38213 transitions. [2022-03-15 16:59:49,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-03-15 16:59:49,386 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:49,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:49,410 INFO L225 Difference]: With dead ends: 12242 [2022-03-15 16:59:49,410 INFO L226 Difference]: Without dead ends: 12242 [2022-03-15 16:59:49,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11117 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4782, Invalid=21300, Unknown=0, NotChecked=0, Total=26082 [2022-03-15 16:59:49,411 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 719 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 1951 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:49,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 644 Invalid, 2090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1951 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:59:49,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12242 states. [2022-03-15 16:59:49,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12242 to 4346. [2022-03-15 16:59:49,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4346 states, 4345 states have (on average 3.614729574223245) internal successors, (15706), 4345 states have internal predecessors, (15706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4346 states to 4346 states and 15706 transitions. [2022-03-15 16:59:49,546 INFO L78 Accepts]: Start accepts. Automaton has 4346 states and 15706 transitions. Word has length 30 [2022-03-15 16:59:49,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:49,547 INFO L470 AbstractCegarLoop]: Abstraction has 4346 states and 15706 transitions. [2022-03-15 16:59:49,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:49,547 INFO L276 IsEmpty]: Start isEmpty. Operand 4346 states and 15706 transitions. [2022-03-15 16:59:49,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:49,554 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:49,554 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:49,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-15 16:59:49,756 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,SelfDestructingSolverStorable48 [2022-03-15 16:59:49,756 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:59:49,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:49,757 INFO L85 PathProgramCache]: Analyzing trace with hash -616619543, now seen corresponding path program 22 times [2022-03-15 16:59:49,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:49,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503148343] [2022-03-15 16:59:49,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:49,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:49,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:49,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503148343] [2022-03-15 16:59:49,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503148343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:49,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744011515] [2022-03-15 16:59:49,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:59:49,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:49,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:49,819 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:49,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 16:59:49,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:59:49,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:49,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:59:49,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:49,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:50,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744011515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:50,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:50,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 16:59:50,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761960317] [2022-03-15 16:59:50,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:50,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:59:50,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:50,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:59:50,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:59:50,103 INFO L87 Difference]: Start difference. First operand 4346 states and 15706 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:52,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:52,943 INFO L93 Difference]: Finished difference Result 11838 states and 37015 transitions. [2022-03-15 16:59:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-03-15 16:59:52,943 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:52,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:52,965 INFO L225 Difference]: With dead ends: 11838 [2022-03-15 16:59:52,965 INFO L226 Difference]: Without dead ends: 11838 [2022-03-15 16:59:52,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10116 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4362, Invalid=20444, Unknown=0, NotChecked=0, Total=24806 [2022-03-15 16:59:52,966 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 714 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 1894 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:52,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 635 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1894 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:59:52,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11838 states. [2022-03-15 16:59:53,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11838 to 4362. [2022-03-15 16:59:53,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4362 states, 4361 states have (on average 3.60651226782848) internal successors, (15728), 4361 states have internal predecessors, (15728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4362 states to 4362 states and 15728 transitions. [2022-03-15 16:59:53,082 INFO L78 Accepts]: Start accepts. Automaton has 4362 states and 15728 transitions. Word has length 30 [2022-03-15 16:59:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:53,083 INFO L470 AbstractCegarLoop]: Abstraction has 4362 states and 15728 transitions. [2022-03-15 16:59:53,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand 4362 states and 15728 transitions. [2022-03-15 16:59:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:53,090 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:53,090 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:53,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-15 16:59:53,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 16:59:53,291 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:59:53,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:53,292 INFO L85 PathProgramCache]: Analyzing trace with hash -278477675, now seen corresponding path program 23 times [2022-03-15 16:59:53,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:53,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307852948] [2022-03-15 16:59:53,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:53,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:53,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:53,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307852948] [2022-03-15 16:59:53,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307852948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:53,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651373477] [2022-03-15 16:59:53,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:59:53,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:53,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:53,339 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:53,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 16:59:53,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:59:53,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:53,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 16:59:53,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:53,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:53,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651373477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:53,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:53,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-03-15 16:59:53,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137545220] [2022-03-15 16:59:53,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:53,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:59:53,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:53,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:59:53,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:59:53,639 INFO L87 Difference]: Start difference. First operand 4362 states and 15728 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:55,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:55,120 INFO L93 Difference]: Finished difference Result 10713 states and 33937 transitions. [2022-03-15 16:59:55,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-15 16:59:55,120 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:59:55,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:55,144 INFO L225 Difference]: With dead ends: 10713 [2022-03-15 16:59:55,145 INFO L226 Difference]: Without dead ends: 10713 [2022-03-15 16:59:55,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3054 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1779, Invalid=6231, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 16:59:55,146 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 435 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:55,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 438 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:59:55,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10713 states. [2022-03-15 16:59:55,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10713 to 4397. [2022-03-15 16:59:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4397 states, 4396 states have (on average 3.6139672429481347) internal successors, (15887), 4396 states have internal predecessors, (15887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4397 states to 4397 states and 15887 transitions. [2022-03-15 16:59:55,286 INFO L78 Accepts]: Start accepts. Automaton has 4397 states and 15887 transitions. Word has length 30 [2022-03-15 16:59:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:55,287 INFO L470 AbstractCegarLoop]: Abstraction has 4397 states and 15887 transitions. [2022-03-15 16:59:55,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 4397 states and 15887 transitions. [2022-03-15 16:59:55,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:59:55,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:55,294 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:55,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-03-15 16:59:55,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:55,495 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:59:55,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:55,495 INFO L85 PathProgramCache]: Analyzing trace with hash 253428639, now seen corresponding path program 24 times [2022-03-15 16:59:55,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:55,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525027596] [2022-03-15 16:59:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:55,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:55,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:55,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525027596] [2022-03-15 16:59:55,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525027596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:55,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812179189] [2022-03-15 16:59:55,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:59:55,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:55,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:55,544 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:55,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 16:59:55,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:59:55,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:55,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:59:55,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:55,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 16:59:55,807 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 16:59:55,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 16:59:55,973 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-03-15 16:59:55,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 16:59:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:59:56,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:56,272 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 16:59:56,272 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 17 treesize of output 26 [2022-03-15 16:59:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:59:56,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812179189] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:56,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:56,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-03-15 16:59:56,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043936212] [2022-03-15 16:59:56,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:56,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:59:56,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:56,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:59:56,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:59:56,413 INFO L87 Difference]: Start difference. First operand 4397 states and 15887 transitions. Second operand has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 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) [2022-03-15 17:00:01,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:01,954 INFO L93 Difference]: Finished difference Result 10822 states and 34699 transitions. [2022-03-15 17:00:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2022-03-15 17:00:01,955 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 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 30 [2022-03-15 17:00:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:01,977 INFO L225 Difference]: With dead ends: 10822 [2022-03-15 17:00:01,977 INFO L226 Difference]: Without dead ends: 10443 [2022-03-15 17:00:01,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21050 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5773, Invalid=45529, Unknown=0, NotChecked=0, Total=51302 [2022-03-15 17:00:01,981 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 719 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 3388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 770 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:01,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 1175 Invalid, 3388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2471 Invalid, 0 Unknown, 770 Unchecked, 1.1s Time] [2022-03-15 17:00:01,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10443 states. [2022-03-15 17:00:02,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10443 to 4539. [2022-03-15 17:00:02,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 3.626707800793301) internal successors, (16458), 4538 states have internal predecessors, (16458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:02,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 16458 transitions. [2022-03-15 17:00:02,107 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 16458 transitions. Word has length 30 [2022-03-15 17:00:02,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:02,107 INFO L470 AbstractCegarLoop]: Abstraction has 4539 states and 16458 transitions. [2022-03-15 17:00:02,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 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) [2022-03-15 17:00:02,107 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 16458 transitions. [2022-03-15 17:00:02,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:02,115 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:02,115 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:02,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-15 17:00:02,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-15 17:00:02,316 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:02,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:02,316 INFO L85 PathProgramCache]: Analyzing trace with hash -26538439, now seen corresponding path program 25 times [2022-03-15 17:00:02,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:02,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424433690] [2022-03-15 17:00:02,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:02,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:02,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:02,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424433690] [2022-03-15 17:00:02,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424433690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:02,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890686329] [2022-03-15 17:00:02,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:00:02,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:02,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:02,373 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:02,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 17:00:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:02,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:00:02,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:02,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:02,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890686329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:02,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:02,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-03-15 17:00:02,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665082433] [2022-03-15 17:00:02,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:02,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 17:00:02,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:02,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 17:00:02,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:00:02,641 INFO L87 Difference]: Start difference. First operand 4539 states and 16458 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:04,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:04,811 INFO L93 Difference]: Finished difference Result 11273 states and 35289 transitions. [2022-03-15 17:00:04,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-15 17:00:04,811 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:04,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:04,834 INFO L225 Difference]: With dead ends: 11273 [2022-03-15 17:00:04,834 INFO L226 Difference]: Without dead ends: 11273 [2022-03-15 17:00:04,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7163 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3292, Invalid=14264, Unknown=0, NotChecked=0, Total=17556 [2022-03-15 17:00:04,837 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 583 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:04,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 566 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1574 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:00:04,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11273 states. [2022-03-15 17:00:04,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11273 to 4555. [2022-03-15 17:00:04,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4555 states, 4554 states have (on average 3.6280193236714977) internal successors, (16522), 4554 states have internal predecessors, (16522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:04,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 16522 transitions. [2022-03-15 17:00:04,995 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 16522 transitions. Word has length 30 [2022-03-15 17:00:04,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:04,995 INFO L470 AbstractCegarLoop]: Abstraction has 4555 states and 16522 transitions. [2022-03-15 17:00:04,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:04,995 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 16522 transitions. [2022-03-15 17:00:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:05,002 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:05,002 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:05,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:05,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:05,215 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:05,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:05,216 INFO L85 PathProgramCache]: Analyzing trace with hash 832947317, now seen corresponding path program 26 times [2022-03-15 17:00:05,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:05,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75265214] [2022-03-15 17:00:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:05,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:05,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:05,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75265214] [2022-03-15 17:00:05,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75265214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:05,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039722169] [2022-03-15 17:00:05,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:00:05,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:05,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:05,291 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:05,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 17:00:05,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:00:05,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:05,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:00:05,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:05,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:05,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039722169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:05,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:05,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-03-15 17:00:05,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257073128] [2022-03-15 17:00:05,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:05,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 17:00:05,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:05,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 17:00:05,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-15 17:00:05,592 INFO L87 Difference]: Start difference. First operand 4555 states and 16522 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:08,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:08,858 INFO L93 Difference]: Finished difference Result 12074 states and 37513 transitions. [2022-03-15 17:00:08,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-03-15 17:00:08,858 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:08,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:08,881 INFO L225 Difference]: With dead ends: 12074 [2022-03-15 17:00:08,881 INFO L226 Difference]: Without dead ends: 12074 [2022-03-15 17:00:08,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15940 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5934, Invalid=30356, Unknown=0, NotChecked=0, Total=36290 [2022-03-15 17:00:08,883 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 710 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1817 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:08,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 660 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1817 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:00:08,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12074 states. [2022-03-15 17:00:09,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12074 to 4635. [2022-03-15 17:00:09,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4635 states, 4634 states have (on average 3.622356495468278) internal successors, (16786), 4634 states have internal predecessors, (16786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:09,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4635 states to 4635 states and 16786 transitions. [2022-03-15 17:00:09,026 INFO L78 Accepts]: Start accepts. Automaton has 4635 states and 16786 transitions. Word has length 30 [2022-03-15 17:00:09,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:09,027 INFO L470 AbstractCegarLoop]: Abstraction has 4635 states and 16786 transitions. [2022-03-15 17:00:09,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:09,027 INFO L276 IsEmpty]: Start isEmpty. Operand 4635 states and 16786 transitions. [2022-03-15 17:00:09,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:09,034 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:09,035 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:09,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-15 17:00:09,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-15 17:00:09,235 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:09,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:09,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1958548217, now seen corresponding path program 27 times [2022-03-15 17:00:09,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:09,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997444476] [2022-03-15 17:00:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:09,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:09,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:09,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:09,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997444476] [2022-03-15 17:00:09,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997444476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:09,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369174820] [2022-03-15 17:00:09,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:00:09,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:09,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:09,297 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:09,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 17:00:09,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 17:00:09,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:09,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:00:09,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:09,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:09,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369174820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:09,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:09,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-03-15 17:00:09,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596651361] [2022-03-15 17:00:09,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:09,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 17:00:09,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:09,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 17:00:09,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-03-15 17:00:09,641 INFO L87 Difference]: Start difference. First operand 4635 states and 16786 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:12,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:12,149 INFO L93 Difference]: Finished difference Result 11138 states and 35112 transitions. [2022-03-15 17:00:12,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-03-15 17:00:12,149 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:12,176 INFO L225 Difference]: With dead ends: 11138 [2022-03-15 17:00:12,176 INFO L226 Difference]: Without dead ends: 11130 [2022-03-15 17:00:12,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9403 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4289, Invalid=18361, Unknown=0, NotChecked=0, Total=22650 [2022-03-15 17:00:12,178 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 622 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:12,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 606 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:00:12,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11130 states. [2022-03-15 17:00:12,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11130 to 4567. [2022-03-15 17:00:12,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4567 states, 4566 states have (on average 3.6151992991677617) internal successors, (16507), 4566 states have internal predecessors, (16507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4567 states to 4567 states and 16507 transitions. [2022-03-15 17:00:12,313 INFO L78 Accepts]: Start accepts. Automaton has 4567 states and 16507 transitions. Word has length 30 [2022-03-15 17:00:12,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:12,313 INFO L470 AbstractCegarLoop]: Abstraction has 4567 states and 16507 transitions. [2022-03-15 17:00:12,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:12,313 INFO L276 IsEmpty]: Start isEmpty. Operand 4567 states and 16507 transitions. [2022-03-15 17:00:12,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:12,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:12,320 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:12,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-15 17:00:12,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-15 17:00:12,521 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:12,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:12,521 INFO L85 PathProgramCache]: Analyzing trace with hash -713124495, now seen corresponding path program 28 times [2022-03-15 17:00:12,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:12,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249991627] [2022-03-15 17:00:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:12,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:12,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:12,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249991627] [2022-03-15 17:00:12,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249991627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:12,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157802473] [2022-03-15 17:00:12,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:00:12,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:12,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:12,572 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:12,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 17:00:12,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:00:12,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:12,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:00:12,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:12,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:12,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157802473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:12,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:12,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-03-15 17:00:12,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907953567] [2022-03-15 17:00:12,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:12,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 17:00:12,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:12,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 17:00:12,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2022-03-15 17:00:12,908 INFO L87 Difference]: Start difference. First operand 4567 states and 16507 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:15,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:15,282 INFO L93 Difference]: Finished difference Result 12349 states and 38953 transitions. [2022-03-15 17:00:15,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-03-15 17:00:15,282 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:15,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:15,312 INFO L225 Difference]: With dead ends: 12349 [2022-03-15 17:00:15,312 INFO L226 Difference]: Without dead ends: 12349 [2022-03-15 17:00:15,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8011 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4044, Invalid=15138, Unknown=0, NotChecked=0, Total=19182 [2022-03-15 17:00:15,315 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 768 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:15,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 519 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:00:15,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12349 states. [2022-03-15 17:00:15,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12349 to 4699. [2022-03-15 17:00:15,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4699 states, 4698 states have (on average 3.62281822051937) internal successors, (17020), 4698 states have internal predecessors, (17020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:15,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4699 states to 4699 states and 17020 transitions. [2022-03-15 17:00:15,494 INFO L78 Accepts]: Start accepts. Automaton has 4699 states and 17020 transitions. Word has length 30 [2022-03-15 17:00:15,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:15,494 INFO L470 AbstractCegarLoop]: Abstraction has 4699 states and 17020 transitions. [2022-03-15 17:00:15,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:15,495 INFO L276 IsEmpty]: Start isEmpty. Operand 4699 states and 17020 transitions. [2022-03-15 17:00:15,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:15,504 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:15,504 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:15,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-15 17:00:15,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:15,716 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:15,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:15,716 INFO L85 PathProgramCache]: Analyzing trace with hash 412476405, now seen corresponding path program 29 times [2022-03-15 17:00:15,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:15,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877390136] [2022-03-15 17:00:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:15,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:15,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:15,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877390136] [2022-03-15 17:00:15,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877390136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:15,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713313577] [2022-03-15 17:00:15,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:00:15,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:15,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:15,799 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:15,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 17:00:15,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 17:00:15,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:15,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:00:15,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:15,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:16,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713313577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:16,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:16,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-03-15 17:00:16,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609392058] [2022-03-15 17:00:16,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:16,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 17:00:16,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:16,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 17:00:16,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-03-15 17:00:16,104 INFO L87 Difference]: Start difference. First operand 4699 states and 17020 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:18,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:18,866 INFO L93 Difference]: Finished difference Result 12269 states and 38987 transitions. [2022-03-15 17:00:18,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-03-15 17:00:18,866 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:18,892 INFO L225 Difference]: With dead ends: 12269 [2022-03-15 17:00:18,892 INFO L226 Difference]: Without dead ends: 12257 [2022-03-15 17:00:18,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10010 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4896, Invalid=19284, Unknown=0, NotChecked=0, Total=24180 [2022-03-15 17:00:18,895 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 713 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:18,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 516 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1847 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:00:18,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12257 states. [2022-03-15 17:00:19,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12257 to 4581. [2022-03-15 17:00:19,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 3.622052401746725) internal successors, (16589), 4580 states have internal predecessors, (16589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 16589 transitions. [2022-03-15 17:00:19,066 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 16589 transitions. Word has length 30 [2022-03-15 17:00:19,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:19,066 INFO L470 AbstractCegarLoop]: Abstraction has 4581 states and 16589 transitions. [2022-03-15 17:00:19,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 16589 transitions. [2022-03-15 17:00:19,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:19,073 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:19,073 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:19,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-15 17:00:19,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:19,274 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:19,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:19,274 INFO L85 PathProgramCache]: Analyzing trace with hash -917258635, now seen corresponding path program 30 times [2022-03-15 17:00:19,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:19,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074089279] [2022-03-15 17:00:19,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:19,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:19,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:19,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074089279] [2022-03-15 17:00:19,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074089279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:19,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86484447] [2022-03-15 17:00:19,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:00:19,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:19,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:19,328 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:19,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 17:00:19,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 17:00:19,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:19,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:00:19,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:19,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:19,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86484447] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:19,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:19,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-03-15 17:00:19,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383474831] [2022-03-15 17:00:19,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:19,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 17:00:19,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:19,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 17:00:19,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-03-15 17:00:19,694 INFO L87 Difference]: Start difference. First operand 4581 states and 16589 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:22,142 INFO L93 Difference]: Finished difference Result 13308 states and 42483 transitions. [2022-03-15 17:00:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-03-15 17:00:22,143 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:22,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:22,169 INFO L225 Difference]: With dead ends: 13308 [2022-03-15 17:00:22,169 INFO L226 Difference]: Without dead ends: 13308 [2022-03-15 17:00:22,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10097 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4756, Invalid=18500, Unknown=0, NotChecked=0, Total=23256 [2022-03-15 17:00:22,173 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 927 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:22,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 513 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:00:22,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13308 states. [2022-03-15 17:00:22,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13308 to 4586. [2022-03-15 17:00:22,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4586 states, 4585 states have (on average 3.6272628135223557) internal successors, (16631), 4585 states have internal predecessors, (16631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4586 states to 4586 states and 16631 transitions. [2022-03-15 17:00:22,335 INFO L78 Accepts]: Start accepts. Automaton has 4586 states and 16631 transitions. Word has length 30 [2022-03-15 17:00:22,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:22,335 INFO L470 AbstractCegarLoop]: Abstraction has 4586 states and 16631 transitions. [2022-03-15 17:00:22,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 4586 states and 16631 transitions. [2022-03-15 17:00:22,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:22,344 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:22,344 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:22,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-15 17:00:22,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:22,559 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:22,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:22,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1035516469, now seen corresponding path program 31 times [2022-03-15 17:00:22,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:22,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342511562] [2022-03-15 17:00:22,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:22,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:22,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:22,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342511562] [2022-03-15 17:00:22,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342511562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:22,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701277082] [2022-03-15 17:00:22,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:00:22,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:22,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:22,604 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:22,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 17:00:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:22,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:00:22,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:22,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:22,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701277082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:22,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:22,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-03-15 17:00:22,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338630248] [2022-03-15 17:00:22,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:22,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 17:00:22,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:22,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 17:00:22,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-03-15 17:00:22,890 INFO L87 Difference]: Start difference. First operand 4586 states and 16631 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:26,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:26,015 INFO L93 Difference]: Finished difference Result 14837 states and 46985 transitions. [2022-03-15 17:00:26,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2022-03-15 17:00:26,016 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:26,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:26,049 INFO L225 Difference]: With dead ends: 14837 [2022-03-15 17:00:26,049 INFO L226 Difference]: Without dead ends: 14837 [2022-03-15 17:00:26,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14666 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6595, Invalid=26347, Unknown=0, NotChecked=0, Total=32942 [2022-03-15 17:00:26,052 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 856 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:26,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 509 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:00:26,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14837 states. [2022-03-15 17:00:26,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14837 to 4565. [2022-03-15 17:00:26,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4565 states, 4564 states have (on average 3.618755477651183) internal successors, (16516), 4564 states have internal predecessors, (16516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:26,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4565 states to 4565 states and 16516 transitions. [2022-03-15 17:00:26,259 INFO L78 Accepts]: Start accepts. Automaton has 4565 states and 16516 transitions. Word has length 30 [2022-03-15 17:00:26,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:26,259 INFO L470 AbstractCegarLoop]: Abstraction has 4565 states and 16516 transitions. [2022-03-15 17:00:26,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:26,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4565 states and 16516 transitions. [2022-03-15 17:00:26,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:26,266 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:26,266 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:26,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-15 17:00:26,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-15 17:00:26,468 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:26,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:26,468 INFO L85 PathProgramCache]: Analyzing trace with hash -863850567, now seen corresponding path program 32 times [2022-03-15 17:00:26,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:26,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873607842] [2022-03-15 17:00:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:26,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:26,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:26,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873607842] [2022-03-15 17:00:26,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873607842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:26,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691630569] [2022-03-15 17:00:26,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:00:26,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:26,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:26,523 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:26,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 17:00:26,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:00:26,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:26,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:00:26,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:26,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:26,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691630569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:26,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:26,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-03-15 17:00:26,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664867626] [2022-03-15 17:00:26,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:26,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 17:00:26,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:26,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 17:00:26,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:00:26,781 INFO L87 Difference]: Start difference. First operand 4565 states and 16516 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:28,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:28,448 INFO L93 Difference]: Finished difference Result 12793 states and 40356 transitions. [2022-03-15 17:00:28,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-15 17:00:28,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:28,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:28,514 INFO L225 Difference]: With dead ends: 12793 [2022-03-15 17:00:28,514 INFO L226 Difference]: Without dead ends: 12785 [2022-03-15 17:00:28,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4715 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2810, Invalid=9180, Unknown=0, NotChecked=0, Total=11990 [2022-03-15 17:00:28,515 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 690 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:28,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 375 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:00:28,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12785 states. [2022-03-15 17:00:28,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12785 to 4571. [2022-03-15 17:00:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4571 states, 4570 states have (on average 3.6185995623632383) internal successors, (16537), 4570 states have internal predecessors, (16537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 16537 transitions. [2022-03-15 17:00:28,653 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 16537 transitions. Word has length 30 [2022-03-15 17:00:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:28,653 INFO L470 AbstractCegarLoop]: Abstraction has 4571 states and 16537 transitions. [2022-03-15 17:00:28,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:28,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 16537 transitions. [2022-03-15 17:00:28,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:28,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:28,660 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:28,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-15 17:00:28,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 17:00:28,861 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:28,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:28,861 INFO L85 PathProgramCache]: Analyzing trace with hash -593340875, now seen corresponding path program 33 times [2022-03-15 17:00:28,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:28,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221372966] [2022-03-15 17:00:28,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:28,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:28,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:28,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221372966] [2022-03-15 17:00:28,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221372966] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:28,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228055065] [2022-03-15 17:00:28,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:00:28,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:28,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:28,917 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:28,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 17:00:28,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 17:00:28,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:28,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:00:28,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:29,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:29,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228055065] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:29,238 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:29,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-03-15 17:00:29,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128476526] [2022-03-15 17:00:29,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:29,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 17:00:29,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:29,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 17:00:29,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:00:29,239 INFO L87 Difference]: Start difference. First operand 4571 states and 16537 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:31,135 INFO L93 Difference]: Finished difference Result 13274 states and 41550 transitions. [2022-03-15 17:00:31,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-15 17:00:31,136 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:31,165 INFO L225 Difference]: With dead ends: 13274 [2022-03-15 17:00:31,165 INFO L226 Difference]: Without dead ends: 13274 [2022-03-15 17:00:31,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5819 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3140, Invalid=10666, Unknown=0, NotChecked=0, Total=13806 [2022-03-15 17:00:31,166 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 683 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:31,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 552 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:00:31,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13274 states. [2022-03-15 17:00:31,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13274 to 4399. [2022-03-15 17:00:31,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4399 states, 4398 states have (on average 3.575943610732151) internal successors, (15727), 4398 states have internal predecessors, (15727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4399 states to 4399 states and 15727 transitions. [2022-03-15 17:00:31,327 INFO L78 Accepts]: Start accepts. Automaton has 4399 states and 15727 transitions. Word has length 30 [2022-03-15 17:00:31,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:31,327 INFO L470 AbstractCegarLoop]: Abstraction has 4399 states and 15727 transitions. [2022-03-15 17:00:31,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:31,327 INFO L276 IsEmpty]: Start isEmpty. Operand 4399 states and 15727 transitions. [2022-03-15 17:00:31,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:31,334 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:31,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:31,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-15 17:00:31,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:31,535 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:31,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:31,535 INFO L85 PathProgramCache]: Analyzing trace with hash -789534161, now seen corresponding path program 34 times [2022-03-15 17:00:31,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:31,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416065341] [2022-03-15 17:00:31,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:31,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 17:00:31,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:31,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416065341] [2022-03-15 17:00:31,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416065341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:31,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114971366] [2022-03-15 17:00:31,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:00:31,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:31,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:31,576 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:31,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 17:00:31,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:00:31,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:31,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 17:00:31,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 17:00:31,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:00:31,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114971366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:31,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:31,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2022-03-15 17:00:31,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304397557] [2022-03-15 17:00:31,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:31,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 17:00:31,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:31,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 17:00:31,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-03-15 17:00:31,826 INFO L87 Difference]: Start difference. First operand 4399 states and 15727 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:32,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:32,112 INFO L93 Difference]: Finished difference Result 6449 states and 21322 transitions. [2022-03-15 17:00:32,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 17:00:32,113 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:32,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:32,125 INFO L225 Difference]: With dead ends: 6449 [2022-03-15 17:00:32,125 INFO L226 Difference]: Without dead ends: 6449 [2022-03-15 17:00:32,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2022-03-15 17:00:32,126 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 302 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:32,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 84 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 17:00:32,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2022-03-15 17:00:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 4316. [2022-03-15 17:00:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4316 states, 4315 states have (on average 3.5606025492468136) internal successors, (15364), 4315 states have internal predecessors, (15364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:32,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4316 states to 4316 states and 15364 transitions. [2022-03-15 17:00:32,206 INFO L78 Accepts]: Start accepts. Automaton has 4316 states and 15364 transitions. Word has length 30 [2022-03-15 17:00:32,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:32,206 INFO L470 AbstractCegarLoop]: Abstraction has 4316 states and 15364 transitions. [2022-03-15 17:00:32,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:32,206 INFO L276 IsEmpty]: Start isEmpty. Operand 4316 states and 15364 transitions. [2022-03-15 17:00:32,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:32,212 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:32,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:32,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-15 17:00:32,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:32,413 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:32,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:32,413 INFO L85 PathProgramCache]: Analyzing trace with hash -530738837, now seen corresponding path program 35 times [2022-03-15 17:00:32,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:32,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183594709] [2022-03-15 17:00:32,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:32,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:00:32,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:32,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183594709] [2022-03-15 17:00:32,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183594709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:32,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569979572] [2022-03-15 17:00:32,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:00:32,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:32,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:32,460 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:32,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 17:00:32,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 17:00:32,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:32,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 17:00:32,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:32,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:32,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569979572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:32,718 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:32,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-03-15 17:00:32,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947005160] [2022-03-15 17:00:32,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:32,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 17:00:32,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:32,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 17:00:32,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-15 17:00:32,719 INFO L87 Difference]: Start difference. First operand 4316 states and 15364 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:34,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:34,884 INFO L93 Difference]: Finished difference Result 9281 states and 29662 transitions. [2022-03-15 17:00:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-15 17:00:34,884 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:34,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:34,905 INFO L225 Difference]: With dead ends: 9281 [2022-03-15 17:00:34,905 INFO L226 Difference]: Without dead ends: 9227 [2022-03-15 17:00:34,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4351 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2944, Invalid=8612, Unknown=0, NotChecked=0, Total=11556 [2022-03-15 17:00:34,906 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 551 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:34,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 353 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:00:34,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9227 states. [2022-03-15 17:00:35,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9227 to 4444. [2022-03-15 17:00:35,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4444 states, 4443 states have (on average 3.5941931127616473) internal successors, (15969), 4443 states have internal predecessors, (15969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:35,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4444 states to 4444 states and 15969 transitions. [2022-03-15 17:00:35,033 INFO L78 Accepts]: Start accepts. Automaton has 4444 states and 15969 transitions. Word has length 30 [2022-03-15 17:00:35,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:35,033 INFO L470 AbstractCegarLoop]: Abstraction has 4444 states and 15969 transitions. [2022-03-15 17:00:35,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:35,033 INFO L276 IsEmpty]: Start isEmpty. Operand 4444 states and 15969 transitions. [2022-03-15 17:00:35,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:35,040 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:35,040 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:35,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-15 17:00:35,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:35,241 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:35,241 INFO L85 PathProgramCache]: Analyzing trace with hash 379456291, now seen corresponding path program 36 times [2022-03-15 17:00:35,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:35,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532665279] [2022-03-15 17:00:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:35,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:35,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:35,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532665279] [2022-03-15 17:00:35,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532665279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:35,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451563690] [2022-03-15 17:00:35,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:00:35,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:35,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:35,306 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:35,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 17:00:35,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 17:00:35,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:35,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 17:00:35,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:35,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:00:35,648 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 17:00:35,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 17:00:35,724 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-03-15 17:00:35,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 17:00:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:00:36,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:36,313 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-03-15 17:00:36,313 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 22 treesize of output 48 [2022-03-15 17:00:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:00:36,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451563690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:36,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:36,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 33 [2022-03-15 17:00:36,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981449493] [2022-03-15 17:00:36,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:36,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 17:00:36,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:36,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 17:00:36,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 17:00:36,698 INFO L87 Difference]: Start difference. First operand 4444 states and 15969 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:47,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:47,026 INFO L93 Difference]: Finished difference Result 14335 states and 45796 transitions. [2022-03-15 17:00:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2022-03-15 17:00:47,026 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:47,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:47,058 INFO L225 Difference]: With dead ends: 14335 [2022-03-15 17:00:47,059 INFO L226 Difference]: Without dead ends: 13974 [2022-03-15 17:00:47,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27978 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=7316, Invalid=60024, Unknown=0, NotChecked=0, Total=67340 [2022-03-15 17:00:47,062 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1151 mSDsluCounter, 2735 mSDsCounter, 0 mSdLazyCounter, 3142 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 5235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 3142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1764 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:47,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 1573 Invalid, 5235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 3142 Invalid, 0 Unknown, 1764 Unchecked, 1.6s Time] [2022-03-15 17:00:47,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13974 states. [2022-03-15 17:00:47,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13974 to 5310. [2022-03-15 17:00:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5310 states, 5309 states have (on average 3.643435675268412) internal successors, (19343), 5309 states have internal predecessors, (19343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:47,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5310 states to 5310 states and 19343 transitions. [2022-03-15 17:00:47,244 INFO L78 Accepts]: Start accepts. Automaton has 5310 states and 19343 transitions. Word has length 30 [2022-03-15 17:00:47,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:47,244 INFO L470 AbstractCegarLoop]: Abstraction has 5310 states and 19343 transitions. [2022-03-15 17:00:47,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:47,244 INFO L276 IsEmpty]: Start isEmpty. Operand 5310 states and 19343 transitions. [2022-03-15 17:00:47,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:47,253 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:47,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:47,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-15 17:00:47,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:47,454 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:47,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:47,454 INFO L85 PathProgramCache]: Analyzing trace with hash 733452651, now seen corresponding path program 37 times [2022-03-15 17:00:47,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:47,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799981319] [2022-03-15 17:00:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:47,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:47,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:47,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799981319] [2022-03-15 17:00:47,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799981319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:47,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038281138] [2022-03-15 17:00:47,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:00:47,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:47,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:47,501 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:47,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 17:00:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:47,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 17:00:47,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:47,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:47,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038281138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:47,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:47,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 17:00:47,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084071369] [2022-03-15 17:00:47,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:47,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 17:00:47,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:47,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 17:00:47,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-03-15 17:00:47,762 INFO L87 Difference]: Start difference. First operand 5310 states and 19343 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:48,021 INFO L93 Difference]: Finished difference Result 7739 states and 26954 transitions. [2022-03-15 17:00:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 17:00:48,022 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:48,037 INFO L225 Difference]: With dead ends: 7739 [2022-03-15 17:00:48,038 INFO L226 Difference]: Without dead ends: 7413 [2022-03-15 17:00:48,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2022-03-15 17:00:48,038 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 266 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:48,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 64 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 17:00:48,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7413 states. [2022-03-15 17:00:48,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7413 to 5670. [2022-03-15 17:00:48,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5670 states, 5669 states have (on average 3.7110601517022404) internal successors, (21038), 5669 states have internal predecessors, (21038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5670 states to 5670 states and 21038 transitions. [2022-03-15 17:00:48,155 INFO L78 Accepts]: Start accepts. Automaton has 5670 states and 21038 transitions. Word has length 30 [2022-03-15 17:00:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:48,155 INFO L470 AbstractCegarLoop]: Abstraction has 5670 states and 21038 transitions. [2022-03-15 17:00:48,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 5670 states and 21038 transitions. [2022-03-15 17:00:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:48,165 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:48,165 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:48,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-15 17:00:48,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-15 17:00:48,365 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:48,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:48,366 INFO L85 PathProgramCache]: Analyzing trace with hash -556252441, now seen corresponding path program 38 times [2022-03-15 17:00:48,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:48,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940473733] [2022-03-15 17:00:48,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:48,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:00:48,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:48,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940473733] [2022-03-15 17:00:48,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940473733] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:48,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515842088] [2022-03-15 17:00:48,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:00:48,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:48,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:48,413 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:48,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 17:00:48,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:00:48,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:48,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 17:00:48,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:48,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 17:00:48,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515842088] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:48,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:48,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 17 [2022-03-15 17:00:48,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411979086] [2022-03-15 17:00:48,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:48,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 17:00:48,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:48,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 17:00:48,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-15 17:00:48,700 INFO L87 Difference]: Start difference. First operand 5670 states and 21038 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:49,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:49,738 INFO L93 Difference]: Finished difference Result 9916 states and 33870 transitions. [2022-03-15 17:00:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 17:00:49,738 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:49,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:49,761 INFO L225 Difference]: With dead ends: 9916 [2022-03-15 17:00:49,761 INFO L226 Difference]: Without dead ends: 9842 [2022-03-15 17:00:49,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1212, Invalid=3210, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 17:00:49,762 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 356 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:49,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 261 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:00:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9842 states. [2022-03-15 17:00:49,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9842 to 6192. [2022-03-15 17:00:49,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6192 states, 6191 states have (on average 3.7491519948312066) internal successors, (23211), 6191 states have internal predecessors, (23211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 23211 transitions. [2022-03-15 17:00:49,926 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 23211 transitions. Word has length 30 [2022-03-15 17:00:49,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:49,926 INFO L470 AbstractCegarLoop]: Abstraction has 6192 states and 23211 transitions. [2022-03-15 17:00:49,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:49,926 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 23211 transitions. [2022-03-15 17:00:49,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:49,937 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:49,937 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:49,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:50,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:50,138 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:50,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:50,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1934026897, now seen corresponding path program 39 times [2022-03-15 17:00:50,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:50,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765389119] [2022-03-15 17:00:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:50,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:50,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:50,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765389119] [2022-03-15 17:00:50,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765389119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:50,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281639929] [2022-03-15 17:00:50,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:00:50,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:50,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:50,191 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:50,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 17:00:50,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:00:50,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:50,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 17:00:50,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:50,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:00:50,583 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 17:00:50,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 17:00:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 17:00:50,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:50,799 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 17:00:50,799 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 17 treesize of output 26 [2022-03-15 17:00:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 17:00:50,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281639929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:50,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:50,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 17:00:50,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825277224] [2022-03-15 17:00:50,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:50,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 17:00:50,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:50,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 17:00:50,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-03-15 17:00:50,969 INFO L87 Difference]: Start difference. First operand 6192 states and 23211 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:52,485 INFO L93 Difference]: Finished difference Result 14134 states and 49084 transitions. [2022-03-15 17:00:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 17:00:52,486 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:52,519 INFO L225 Difference]: With dead ends: 14134 [2022-03-15 17:00:52,519 INFO L226 Difference]: Without dead ends: 13763 [2022-03-15 17:00:52,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=924, Invalid=5082, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 17:00:52,521 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 353 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 2282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 981 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:52,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 801 Invalid, 2282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1225 Invalid, 0 Unknown, 981 Unchecked, 0.5s Time] [2022-03-15 17:00:52,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13763 states. [2022-03-15 17:00:52,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13763 to 8244. [2022-03-15 17:00:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8244 states, 8243 states have (on average 3.843018318573335) internal successors, (31678), 8243 states have internal predecessors, (31678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:52,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8244 states to 8244 states and 31678 transitions. [2022-03-15 17:00:52,726 INFO L78 Accepts]: Start accepts. Automaton has 8244 states and 31678 transitions. Word has length 30 [2022-03-15 17:00:52,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:52,726 INFO L470 AbstractCegarLoop]: Abstraction has 8244 states and 31678 transitions. [2022-03-15 17:00:52,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:52,727 INFO L276 IsEmpty]: Start isEmpty. Operand 8244 states and 31678 transitions. [2022-03-15 17:00:52,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:52,773 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:52,773 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:52,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-15 17:00:52,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-15 17:00:52,974 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:52,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:52,974 INFO L85 PathProgramCache]: Analyzing trace with hash 109854575, now seen corresponding path program 40 times [2022-03-15 17:00:52,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:52,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076487293] [2022-03-15 17:00:52,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:52,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:53,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:53,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076487293] [2022-03-15 17:00:53,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076487293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:53,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053832897] [2022-03-15 17:00:53,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:00:53,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:53,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:53,034 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:53,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 17:00:53,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:00:53,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:53,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:00:53,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:00:53,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:53,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053832897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:53,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:53,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-03-15 17:00:53,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145394860] [2022-03-15 17:00:53,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:53,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 17:00:53,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:53,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 17:00:53,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-15 17:00:53,268 INFO L87 Difference]: Start difference. First operand 8244 states and 31678 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:54,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:54,304 INFO L93 Difference]: Finished difference Result 15792 states and 55324 transitions. [2022-03-15 17:00:54,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 17:00:54,305 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:54,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:54,344 INFO L225 Difference]: With dead ends: 15792 [2022-03-15 17:00:54,344 INFO L226 Difference]: Without dead ends: 15792 [2022-03-15 17:00:54,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1285, Invalid=4117, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 17:00:54,345 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 448 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:54,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 391 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 17:00:54,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15792 states. [2022-03-15 17:00:54,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15792 to 8160. [2022-03-15 17:00:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8160 states, 8159 states have (on average 3.8534134085059444) internal successors, (31440), 8159 states have internal predecessors, (31440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8160 states to 8160 states and 31440 transitions. [2022-03-15 17:00:54,590 INFO L78 Accepts]: Start accepts. Automaton has 8160 states and 31440 transitions. Word has length 30 [2022-03-15 17:00:54,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:54,590 INFO L470 AbstractCegarLoop]: Abstraction has 8160 states and 31440 transitions. [2022-03-15 17:00:54,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:54,590 INFO L276 IsEmpty]: Start isEmpty. Operand 8160 states and 31440 transitions. [2022-03-15 17:00:54,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:54,605 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:54,605 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:54,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-15 17:00:54,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-15 17:00:54,805 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:54,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:54,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1583886883, now seen corresponding path program 41 times [2022-03-15 17:00:54,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:54,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322431527] [2022-03-15 17:00:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:54,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:54,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:54,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322431527] [2022-03-15 17:00:54,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322431527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:54,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72489597] [2022-03-15 17:00:54,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:00:54,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:54,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:54,878 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:54,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 17:00:54,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 17:00:54,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:54,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:00:54,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:55,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:55,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:55,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72489597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:55,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:55,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 17:00:55,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647142203] [2022-03-15 17:00:55,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:55,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 17:00:55,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:55,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 17:00:55,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-03-15 17:00:55,219 INFO L87 Difference]: Start difference. First operand 8160 states and 31440 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:57,919 INFO L93 Difference]: Finished difference Result 16864 states and 57485 transitions. [2022-03-15 17:00:57,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-03-15 17:00:57,920 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:00:57,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:57,965 INFO L225 Difference]: With dead ends: 16864 [2022-03-15 17:00:57,965 INFO L226 Difference]: Without dead ends: 16864 [2022-03-15 17:00:57,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9186 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3892, Invalid=18458, Unknown=0, NotChecked=0, Total=22350 [2022-03-15 17:00:57,968 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 582 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:57,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 787 Invalid, 1969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1872 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:00:57,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16864 states. [2022-03-15 17:00:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16864 to 8404. [2022-03-15 17:00:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8404 states, 8403 states have (on average 3.835534928001904) internal successors, (32230), 8403 states have internal predecessors, (32230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8404 states to 8404 states and 32230 transitions. [2022-03-15 17:00:58,290 INFO L78 Accepts]: Start accepts. Automaton has 8404 states and 32230 transitions. Word has length 30 [2022-03-15 17:00:58,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:58,291 INFO L470 AbstractCegarLoop]: Abstraction has 8404 states and 32230 transitions. [2022-03-15 17:00:58,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:58,291 INFO L276 IsEmpty]: Start isEmpty. Operand 8404 states and 32230 transitions. [2022-03-15 17:00:58,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:00:58,306 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:58,306 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:58,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:58,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-15 17:00:58,507 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:00:58,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:58,507 INFO L85 PathProgramCache]: Analyzing trace with hash 528509489, now seen corresponding path program 42 times [2022-03-15 17:00:58,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:58,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414404681] [2022-03-15 17:00:58,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:58,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:00:58,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:58,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414404681] [2022-03-15 17:00:58,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414404681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:58,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822472913] [2022-03-15 17:00:58,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:00:58,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:58,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:58,565 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:58,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 17:00:58,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 17:00:58,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:58,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:00:58,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:00:58,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:58,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822472913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:58,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:58,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 17:00:58,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694388477] [2022-03-15 17:00:58,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:58,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 17:00:58,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:58,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 17:00:58,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-03-15 17:00:58,925 INFO L87 Difference]: Start difference. First operand 8404 states and 32230 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:00,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:00,864 INFO L93 Difference]: Finished difference Result 15651 states and 54475 transitions. [2022-03-15 17:01:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-03-15 17:01:00,864 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:00,903 INFO L225 Difference]: With dead ends: 15651 [2022-03-15 17:01:00,903 INFO L226 Difference]: Without dead ends: 15643 [2022-03-15 17:01:00,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5719 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2883, Invalid=11879, Unknown=0, NotChecked=0, Total=14762 [2022-03-15 17:01:00,905 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 603 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:00,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 479 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:01:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15643 states. [2022-03-15 17:01:01,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15643 to 8342. [2022-03-15 17:01:01,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8342 states, 8341 states have (on average 3.8394676897254527) internal successors, (32025), 8341 states have internal predecessors, (32025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:01,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8342 states to 8342 states and 32025 transitions. [2022-03-15 17:01:01,206 INFO L78 Accepts]: Start accepts. Automaton has 8342 states and 32025 transitions. Word has length 30 [2022-03-15 17:01:01,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:01,206 INFO L470 AbstractCegarLoop]: Abstraction has 8342 states and 32025 transitions. [2022-03-15 17:01:01,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:01,206 INFO L276 IsEmpty]: Start isEmpty. Operand 8342 states and 32025 transitions. [2022-03-15 17:01:01,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:01,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:01,221 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:01,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-15 17:01:01,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-15 17:01:01,422 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:01,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:01,422 INFO L85 PathProgramCache]: Analyzing trace with hash 2011644427, now seen corresponding path program 43 times [2022-03-15 17:01:01,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:01,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884654926] [2022-03-15 17:01:01,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:01,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:01,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:01,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884654926] [2022-03-15 17:01:01,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884654926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:01,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056190094] [2022-03-15 17:01:01,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:01:01,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:01,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:01,481 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:01,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 17:01:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:01,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:01:01,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:01,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:01,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056190094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:01,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:01,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-03-15 17:01:01,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799358751] [2022-03-15 17:01:01,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:01,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 17:01:01,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:01,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 17:01:01,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-03-15 17:01:01,756 INFO L87 Difference]: Start difference. First operand 8342 states and 32025 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:03,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:03,675 INFO L93 Difference]: Finished difference Result 15609 states and 54374 transitions. [2022-03-15 17:01:03,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-15 17:01:03,675 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:03,714 INFO L225 Difference]: With dead ends: 15609 [2022-03-15 17:01:03,714 INFO L226 Difference]: Without dead ends: 15585 [2022-03-15 17:01:03,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5313 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2694, Invalid=11112, Unknown=0, NotChecked=0, Total=13806 [2022-03-15 17:01:03,715 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 526 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:03,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 555 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:01:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15585 states. [2022-03-15 17:01:03,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15585 to 8434. [2022-03-15 17:01:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8434 states, 8433 states have (on average 3.831495316020396) internal successors, (32311), 8433 states have internal predecessors, (32311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:03,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8434 states to 8434 states and 32311 transitions. [2022-03-15 17:01:03,964 INFO L78 Accepts]: Start accepts. Automaton has 8434 states and 32311 transitions. Word has length 30 [2022-03-15 17:01:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:03,964 INFO L470 AbstractCegarLoop]: Abstraction has 8434 states and 32311 transitions. [2022-03-15 17:01:03,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 8434 states and 32311 transitions. [2022-03-15 17:01:03,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:03,979 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:03,979 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:03,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-15 17:01:04,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:04,179 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:04,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:04,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1914992093, now seen corresponding path program 44 times [2022-03-15 17:01:04,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:04,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589725553] [2022-03-15 17:01:04,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:04,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:04,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:04,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589725553] [2022-03-15 17:01:04,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589725553] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:04,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862049320] [2022-03-15 17:01:04,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:01:04,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:04,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:04,241 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:04,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 17:01:04,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:01:04,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:04,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:01:04,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:04,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:04,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862049320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:04,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:04,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-03-15 17:01:04,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762412875] [2022-03-15 17:01:04,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:04,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 17:01:04,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:04,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 17:01:04,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-03-15 17:01:04,608 INFO L87 Difference]: Start difference. First operand 8434 states and 32311 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:07,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:07,435 INFO L93 Difference]: Finished difference Result 20916 states and 72438 transitions. [2022-03-15 17:01:07,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-03-15 17:01:07,435 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:07,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:07,491 INFO L225 Difference]: With dead ends: 20916 [2022-03-15 17:01:07,491 INFO L226 Difference]: Without dead ends: 20916 [2022-03-15 17:01:07,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9937 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4752, Invalid=19428, Unknown=0, NotChecked=0, Total=24180 [2022-03-15 17:01:07,493 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 766 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:07,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 615 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1688 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:01:07,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20916 states. [2022-03-15 17:01:07,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20916 to 10611. [2022-03-15 17:01:07,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10611 states, 10610 states have (on average 3.853722902921772) internal successors, (40888), 10610 states have internal predecessors, (40888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:07,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10611 states to 10611 states and 40888 transitions. [2022-03-15 17:01:07,847 INFO L78 Accepts]: Start accepts. Automaton has 10611 states and 40888 transitions. Word has length 30 [2022-03-15 17:01:07,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:07,847 INFO L470 AbstractCegarLoop]: Abstraction has 10611 states and 40888 transitions. [2022-03-15 17:01:07,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:07,847 INFO L276 IsEmpty]: Start isEmpty. Operand 10611 states and 40888 transitions. [2022-03-15 17:01:07,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:07,910 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:07,911 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:07,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-15 17:01:08,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:08,111 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:08,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:08,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1324597809, now seen corresponding path program 45 times [2022-03-15 17:01:08,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:08,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419730352] [2022-03-15 17:01:08,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:08,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:08,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:08,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419730352] [2022-03-15 17:01:08,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419730352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:08,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919389970] [2022-03-15 17:01:08,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:01:08,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:08,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:08,172 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:08,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 17:01:08,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 17:01:08,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:08,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:01:08,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:08,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:08,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919389970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:08,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:08,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-03-15 17:01:08,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265084513] [2022-03-15 17:01:08,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:08,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 17:01:08,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:08,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 17:01:08,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-03-15 17:01:08,515 INFO L87 Difference]: Start difference. First operand 10611 states and 40888 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:11,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:11,491 INFO L93 Difference]: Finished difference Result 21405 states and 74782 transitions. [2022-03-15 17:01:11,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-03-15 17:01:11,492 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:11,558 INFO L225 Difference]: With dead ends: 21405 [2022-03-15 17:01:11,558 INFO L226 Difference]: Without dead ends: 21381 [2022-03-15 17:01:11,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12520 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5919, Invalid=24881, Unknown=0, NotChecked=0, Total=30800 [2022-03-15 17:01:11,562 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1022 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:11,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 454 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:01:11,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21381 states. [2022-03-15 17:01:11,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21381 to 10491. [2022-03-15 17:01:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10491 states, 10490 states have (on average 3.85815061963775) internal successors, (40472), 10490 states have internal predecessors, (40472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10491 states to 10491 states and 40472 transitions. [2022-03-15 17:01:12,029 INFO L78 Accepts]: Start accepts. Automaton has 10491 states and 40472 transitions. Word has length 30 [2022-03-15 17:01:12,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:12,029 INFO L470 AbstractCegarLoop]: Abstraction has 10491 states and 40472 transitions. [2022-03-15 17:01:12,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:12,029 INFO L276 IsEmpty]: Start isEmpty. Operand 10491 states and 40472 transitions. [2022-03-15 17:01:12,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:12,049 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:12,049 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:12,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-15 17:01:12,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:12,250 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:12,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:12,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1487234549, now seen corresponding path program 46 times [2022-03-15 17:01:12,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:12,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605329677] [2022-03-15 17:01:12,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:12,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:12,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:12,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605329677] [2022-03-15 17:01:12,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605329677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:12,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191804667] [2022-03-15 17:01:12,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:01:12,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:12,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:12,313 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:12,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 17:01:12,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:01:12,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:12,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:01:12,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:12,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:12,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191804667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:12,581 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:12,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-03-15 17:01:12,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650084595] [2022-03-15 17:01:12,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:12,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 17:01:12,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:12,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 17:01:12,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-03-15 17:01:12,582 INFO L87 Difference]: Start difference. First operand 10491 states and 40472 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:15,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:15,166 INFO L93 Difference]: Finished difference Result 20619 states and 72607 transitions. [2022-03-15 17:01:15,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-03-15 17:01:15,166 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:15,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:15,226 INFO L225 Difference]: With dead ends: 20619 [2022-03-15 17:01:15,226 INFO L226 Difference]: Without dead ends: 20571 [2022-03-15 17:01:15,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8609 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4296, Invalid=17756, Unknown=0, NotChecked=0, Total=22052 [2022-03-15 17:01:15,227 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 753 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:15,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 425 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:01:15,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20571 states. [2022-03-15 17:01:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20571 to 10513. [2022-03-15 17:01:15,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10513 states, 10512 states have (on average 3.8593036529680367) internal successors, (40569), 10512 states have internal predecessors, (40569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:15,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10513 states to 10513 states and 40569 transitions. [2022-03-15 17:01:15,623 INFO L78 Accepts]: Start accepts. Automaton has 10513 states and 40569 transitions. Word has length 30 [2022-03-15 17:01:15,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:15,623 INFO L470 AbstractCegarLoop]: Abstraction has 10513 states and 40569 transitions. [2022-03-15 17:01:15,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand 10513 states and 40569 transitions. [2022-03-15 17:01:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:15,644 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:15,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:15,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:15,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-03-15 17:01:15,844 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:15,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:15,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1003077941, now seen corresponding path program 47 times [2022-03-15 17:01:15,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:15,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524778583] [2022-03-15 17:01:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:15,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:15,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:15,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524778583] [2022-03-15 17:01:15,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524778583] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:15,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670432251] [2022-03-15 17:01:15,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:01:15,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:15,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:15,894 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:15,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 17:01:15,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 17:01:15,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:15,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:01:15,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:16,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:16,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670432251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:16,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:16,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2022-03-15 17:01:16,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351731700] [2022-03-15 17:01:16,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:16,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 17:01:16,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:16,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 17:01:16,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-03-15 17:01:16,162 INFO L87 Difference]: Start difference. First operand 10513 states and 40569 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:17,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:17,766 INFO L93 Difference]: Finished difference Result 21294 states and 74335 transitions. [2022-03-15 17:01:17,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-15 17:01:17,766 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:17,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:17,826 INFO L225 Difference]: With dead ends: 21294 [2022-03-15 17:01:17,826 INFO L226 Difference]: Without dead ends: 21234 [2022-03-15 17:01:17,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3973 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2362, Invalid=8350, Unknown=0, NotChecked=0, Total=10712 [2022-03-15 17:01:17,827 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 688 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:17,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 362 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:01:17,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21234 states. [2022-03-15 17:01:18,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21234 to 10549. [2022-03-15 17:01:18,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10549 states, 10548 states have (on average 3.8569397042093287) internal successors, (40683), 10548 states have internal predecessors, (40683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10549 states to 10549 states and 40683 transitions. [2022-03-15 17:01:18,195 INFO L78 Accepts]: Start accepts. Automaton has 10549 states and 40683 transitions. Word has length 30 [2022-03-15 17:01:18,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:18,196 INFO L470 AbstractCegarLoop]: Abstraction has 10549 states and 40683 transitions. [2022-03-15 17:01:18,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:18,196 INFO L276 IsEmpty]: Start isEmpty. Operand 10549 states and 40683 transitions. [2022-03-15 17:01:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:18,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:18,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:18,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-15 17:01:18,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:18,416 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:18,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:18,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1799884623, now seen corresponding path program 48 times [2022-03-15 17:01:18,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:18,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899960818] [2022-03-15 17:01:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:18,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:18,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:18,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899960818] [2022-03-15 17:01:18,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899960818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:18,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150593372] [2022-03-15 17:01:18,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:01:18,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:18,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:18,466 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:18,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 17:01:18,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 17:01:18,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:18,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:01:18,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:18,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:18,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150593372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:18,707 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:18,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2022-03-15 17:01:18,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865244625] [2022-03-15 17:01:18,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:18,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 17:01:18,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:18,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 17:01:18,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-03-15 17:01:18,708 INFO L87 Difference]: Start difference. First operand 10549 states and 40683 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:19,926 INFO L93 Difference]: Finished difference Result 20594 states and 72770 transitions. [2022-03-15 17:01:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-15 17:01:19,927 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:19,980 INFO L225 Difference]: With dead ends: 20594 [2022-03-15 17:01:19,980 INFO L226 Difference]: Without dead ends: 20570 [2022-03-15 17:01:19,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1571, Invalid=5235, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 17:01:19,981 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 685 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:19,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 291 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 17:01:19,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20570 states. [2022-03-15 17:01:20,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20570 to 10859. [2022-03-15 17:01:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10859 states, 10858 states have (on average 3.8277767544667527) internal successors, (41562), 10858 states have internal predecessors, (41562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10859 states to 10859 states and 41562 transitions. [2022-03-15 17:01:20,353 INFO L78 Accepts]: Start accepts. Automaton has 10859 states and 41562 transitions. Word has length 30 [2022-03-15 17:01:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:20,354 INFO L470 AbstractCegarLoop]: Abstraction has 10859 states and 41562 transitions. [2022-03-15 17:01:20,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 10859 states and 41562 transitions. [2022-03-15 17:01:20,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:20,373 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:20,373 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:20,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-15 17:01:20,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:20,574 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:20,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:20,574 INFO L85 PathProgramCache]: Analyzing trace with hash 2070394315, now seen corresponding path program 49 times [2022-03-15 17:01:20,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:20,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142356162] [2022-03-15 17:01:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:20,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:20,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:20,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142356162] [2022-03-15 17:01:20,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142356162] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:20,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101342957] [2022-03-15 17:01:20,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:01:20,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:20,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:20,636 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:20,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 17:01:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:20,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:01:20,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:20,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:20,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101342957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:20,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:20,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2022-03-15 17:01:20,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337608097] [2022-03-15 17:01:20,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:20,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 17:01:20,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:20,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 17:01:20,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-03-15 17:01:20,896 INFO L87 Difference]: Start difference. First operand 10859 states and 41562 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:22,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:22,332 INFO L93 Difference]: Finished difference Result 21194 states and 74398 transitions. [2022-03-15 17:01:22,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-15 17:01:22,333 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:22,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:22,389 INFO L225 Difference]: With dead ends: 21194 [2022-03-15 17:01:22,389 INFO L226 Difference]: Without dead ends: 21194 [2022-03-15 17:01:22,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3013 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1812, Invalid=6378, Unknown=0, NotChecked=0, Total=8190 [2022-03-15 17:01:22,390 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 531 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:22,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 408 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:01:22,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21194 states. [2022-03-15 17:01:22,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21194 to 10615. [2022-03-15 17:01:22,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10615 states, 10614 states have (on average 3.8362540041454682) internal successors, (40718), 10614 states have internal predecessors, (40718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:22,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10615 states to 10615 states and 40718 transitions. [2022-03-15 17:01:22,766 INFO L78 Accepts]: Start accepts. Automaton has 10615 states and 40718 transitions. Word has length 30 [2022-03-15 17:01:22,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:22,766 INFO L470 AbstractCegarLoop]: Abstraction has 10615 states and 40718 transitions. [2022-03-15 17:01:22,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:22,767 INFO L276 IsEmpty]: Start isEmpty. Operand 10615 states and 40718 transitions. [2022-03-15 17:01:22,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:22,785 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:22,785 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:22,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-15 17:01:22,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-15 17:01:22,986 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:22,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:22,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1709119399, now seen corresponding path program 50 times [2022-03-15 17:01:22,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:22,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764023320] [2022-03-15 17:01:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:22,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:23,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:23,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764023320] [2022-03-15 17:01:23,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764023320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:23,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396869661] [2022-03-15 17:01:23,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:01:23,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:23,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:23,041 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:23,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 17:01:23,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:01:23,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:23,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:01:23,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 17:01:23,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:23,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396869661] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:23,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:23,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-03-15 17:01:23,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414775435] [2022-03-15 17:01:23,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:23,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 17:01:23,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:23,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 17:01:23,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-15 17:01:23,279 INFO L87 Difference]: Start difference. First operand 10615 states and 40718 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:24,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:24,089 INFO L93 Difference]: Finished difference Result 18007 states and 64907 transitions. [2022-03-15 17:01:24,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 17:01:24,090 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:24,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:24,135 INFO L225 Difference]: With dead ends: 18007 [2022-03-15 17:01:24,135 INFO L226 Difference]: Without dead ends: 17983 [2022-03-15 17:01:24,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=755, Invalid=2551, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 17:01:24,136 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 500 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:24,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 305 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 17:01:24,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17983 states. [2022-03-15 17:01:24,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17983 to 10712. [2022-03-15 17:01:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10712 states, 10711 states have (on average 3.8259732984782) internal successors, (40980), 10711 states have internal predecessors, (40980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10712 states to 10712 states and 40980 transitions. [2022-03-15 17:01:24,418 INFO L78 Accepts]: Start accepts. Automaton has 10712 states and 40980 transitions. Word has length 30 [2022-03-15 17:01:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:24,418 INFO L470 AbstractCegarLoop]: Abstraction has 10712 states and 40980 transitions. [2022-03-15 17:01:24,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 10712 states and 40980 transitions. [2022-03-15 17:01:24,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:24,436 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:24,436 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:24,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-15 17:01:24,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-15 17:01:24,637 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:24,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:24,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1875224879, now seen corresponding path program 51 times [2022-03-15 17:01:24,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:24,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210845740] [2022-03-15 17:01:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:24,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:24,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:24,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210845740] [2022-03-15 17:01:24,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210845740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:24,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287033979] [2022-03-15 17:01:24,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:01:24,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:24,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:24,685 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:24,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 17:01:24,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:01:24,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:24,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 17:01:24,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:24,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 17:01:24,958 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-03-15 17:01:24,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-15 17:01:25,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:01:25,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:01:25,049 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 17:01:25,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 32 [2022-03-15 17:01:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:01:25,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:25,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 17:01:25,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 17:01:25,480 INFO L353 Elim1Store]: treesize reduction 15, result has 59.5 percent of original size [2022-03-15 17:01:25,480 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 38 [2022-03-15 17:01:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:01:25,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287033979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:25,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:25,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 33 [2022-03-15 17:01:25,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480465215] [2022-03-15 17:01:25,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:25,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 17:01:25,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:25,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 17:01:25,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 17:01:25,714 INFO L87 Difference]: Start difference. First operand 10712 states and 40980 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:38,370 INFO L93 Difference]: Finished difference Result 22235 states and 76160 transitions. [2022-03-15 17:01:38,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 315 states. [2022-03-15 17:01:38,370 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:38,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:38,428 INFO L225 Difference]: With dead ends: 22235 [2022-03-15 17:01:38,428 INFO L226 Difference]: Without dead ends: 21879 [2022-03-15 17:01:38,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53870 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=16043, Invalid=97863, Unknown=0, NotChecked=0, Total=113906 [2022-03-15 17:01:38,435 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 1776 mSDsluCounter, 2013 mSDsCounter, 0 mSdLazyCounter, 2795 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1776 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 4267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 2795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1085 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:38,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1776 Valid, 1118 Invalid, 4267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 2795 Invalid, 0 Unknown, 1085 Unchecked, 1.5s Time] [2022-03-15 17:01:38,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21879 states. [2022-03-15 17:01:38,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21879 to 10551. [2022-03-15 17:01:38,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10551 states, 10550 states have (on average 3.8341232227488153) internal successors, (40450), 10550 states have internal predecessors, (40450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:38,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10551 states to 10551 states and 40450 transitions. [2022-03-15 17:01:38,856 INFO L78 Accepts]: Start accepts. Automaton has 10551 states and 40450 transitions. Word has length 30 [2022-03-15 17:01:38,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:38,856 INFO L470 AbstractCegarLoop]: Abstraction has 10551 states and 40450 transitions. [2022-03-15 17:01:38,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:38,856 INFO L276 IsEmpty]: Start isEmpty. Operand 10551 states and 40450 transitions. [2022-03-15 17:01:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:38,876 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:38,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:38,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:39,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:39,077 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:39,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:39,078 INFO L85 PathProgramCache]: Analyzing trace with hash 898941043, now seen corresponding path program 52 times [2022-03-15 17:01:39,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:39,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530558547] [2022-03-15 17:01:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:39,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:01:39,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:39,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530558547] [2022-03-15 17:01:39,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530558547] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:39,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648596064] [2022-03-15 17:01:39,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:01:39,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:39,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:39,123 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:39,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 17:01:39,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:01:39,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:39,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 17:01:39,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 17:01:39,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:01:39,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648596064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:39,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:39,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2022-03-15 17:01:39,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121940433] [2022-03-15 17:01:39,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:39,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 17:01:39,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:39,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 17:01:39,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-03-15 17:01:39,357 INFO L87 Difference]: Start difference. First operand 10551 states and 40450 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:39,635 INFO L93 Difference]: Finished difference Result 13750 states and 51008 transitions. [2022-03-15 17:01:39,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 17:01:39,635 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:39,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:39,673 INFO L225 Difference]: With dead ends: 13750 [2022-03-15 17:01:39,673 INFO L226 Difference]: Without dead ends: 13710 [2022-03-15 17:01:39,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2022-03-15 17:01:39,673 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 208 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:39,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 85 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 17:01:39,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13710 states. [2022-03-15 17:01:39,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13710 to 10277. [2022-03-15 17:01:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 3.822109770338653) internal successors, (39276), 10276 states have internal predecessors, (39276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 39276 transitions. [2022-03-15 17:01:39,903 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 39276 transitions. Word has length 30 [2022-03-15 17:01:39,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:39,903 INFO L470 AbstractCegarLoop]: Abstraction has 10277 states and 39276 transitions. [2022-03-15 17:01:39,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:39,903 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 39276 transitions. [2022-03-15 17:01:39,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:39,922 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:39,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:39,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:40,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:40,123 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:40,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:40,123 INFO L85 PathProgramCache]: Analyzing trace with hash -243984997, now seen corresponding path program 53 times [2022-03-15 17:01:40,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:40,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069218804] [2022-03-15 17:01:40,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:40,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:01:40,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:40,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069218804] [2022-03-15 17:01:40,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069218804] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:40,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088375838] [2022-03-15 17:01:40,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:01:40,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:40,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:40,160 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:40,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 17:01:40,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 17:01:40,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:40,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 17:01:40,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 17:01:40,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:01:40,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088375838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:40,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:40,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2022-03-15 17:01:40,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854086572] [2022-03-15 17:01:40,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:40,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 17:01:40,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:40,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 17:01:40,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-03-15 17:01:40,399 INFO L87 Difference]: Start difference. First operand 10277 states and 39276 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:40,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:40,924 INFO L93 Difference]: Finished difference Result 15943 states and 57174 transitions. [2022-03-15 17:01:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 17:01:40,924 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:40,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:40,967 INFO L225 Difference]: With dead ends: 15943 [2022-03-15 17:01:40,968 INFO L226 Difference]: Without dead ends: 15943 [2022-03-15 17:01:40,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=462, Invalid=944, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 17:01:40,968 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 420 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:40,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 122 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 17:01:40,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15943 states. [2022-03-15 17:01:41,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15943 to 11669. [2022-03-15 17:01:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11669 states, 11668 states have (on average 3.842817963661296) internal successors, (44838), 11668 states have internal predecessors, (44838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:41,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11669 states to 11669 states and 44838 transitions. [2022-03-15 17:01:41,248 INFO L78 Accepts]: Start accepts. Automaton has 11669 states and 44838 transitions. Word has length 30 [2022-03-15 17:01:41,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:41,248 INFO L470 AbstractCegarLoop]: Abstraction has 11669 states and 44838 transitions. [2022-03-15 17:01:41,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:41,248 INFO L276 IsEmpty]: Start isEmpty. Operand 11669 states and 44838 transitions. [2022-03-15 17:01:41,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:41,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:41,270 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:41,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-15 17:01:41,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:41,471 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:41,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:41,471 INFO L85 PathProgramCache]: Analyzing trace with hash 14810327, now seen corresponding path program 54 times [2022-03-15 17:01:41,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:41,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715144716] [2022-03-15 17:01:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:41,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:01:41,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:41,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715144716] [2022-03-15 17:01:41,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715144716] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:41,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203897087] [2022-03-15 17:01:41,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:01:41,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:41,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:41,506 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:41,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 17:01:41,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 17:01:41,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:41,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 17:01:41,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 17:01:41,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:01:41,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203897087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:41,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:41,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 13 [2022-03-15 17:01:41,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448479905] [2022-03-15 17:01:41,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:41,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 17:01:41,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:41,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 17:01:41,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-03-15 17:01:41,723 INFO L87 Difference]: Start difference. First operand 11669 states and 44838 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:42,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:42,040 INFO L93 Difference]: Finished difference Result 14497 states and 53134 transitions. [2022-03-15 17:01:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 17:01:42,041 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:42,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:42,076 INFO L225 Difference]: With dead ends: 14497 [2022-03-15 17:01:42,076 INFO L226 Difference]: Without dead ends: 14497 [2022-03-15 17:01:42,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2022-03-15 17:01:42,076 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 249 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:42,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 93 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 17:01:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14497 states. [2022-03-15 17:01:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14497 to 11861. [2022-03-15 17:01:42,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11861 states, 11860 states have (on average 3.8397133220910624) internal successors, (45539), 11860 states have internal predecessors, (45539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:42,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11861 states to 11861 states and 45539 transitions. [2022-03-15 17:01:42,381 INFO L78 Accepts]: Start accepts. Automaton has 11861 states and 45539 transitions. Word has length 30 [2022-03-15 17:01:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:42,381 INFO L470 AbstractCegarLoop]: Abstraction has 11861 states and 45539 transitions. [2022-03-15 17:01:42,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 11861 states and 45539 transitions. [2022-03-15 17:01:42,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:42,402 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:42,402 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:42,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-15 17:01:42,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:42,603 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:42,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:42,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1974130723, now seen corresponding path program 55 times [2022-03-15 17:01:42,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:42,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070436039] [2022-03-15 17:01:42,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:42,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:42,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:42,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070436039] [2022-03-15 17:01:42,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070436039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:42,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181341814] [2022-03-15 17:01:42,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:01:42,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:42,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:42,658 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:42,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 17:01:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:42,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:01:42,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:01:42,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:42,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181341814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:42,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:42,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-03-15 17:01:42,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970560207] [2022-03-15 17:01:42,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:42,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 17:01:42,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:42,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 17:01:42,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-15 17:01:42,895 INFO L87 Difference]: Start difference. First operand 11861 states and 45539 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:44,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:44,212 INFO L93 Difference]: Finished difference Result 25004 states and 87435 transitions. [2022-03-15 17:01:44,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-15 17:01:44,212 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:44,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:44,291 INFO L225 Difference]: With dead ends: 25004 [2022-03-15 17:01:44,291 INFO L226 Difference]: Without dead ends: 25004 [2022-03-15 17:01:44,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1732, Invalid=6640, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 17:01:44,292 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 619 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:44,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 329 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 17:01:44,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25004 states. [2022-03-15 17:01:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25004 to 13016. [2022-03-15 17:01:44,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13016 states, 13015 states have (on average 3.8539377641183252) internal successors, (50159), 13015 states have internal predecessors, (50159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:44,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13016 states to 13016 states and 50159 transitions. [2022-03-15 17:01:44,799 INFO L78 Accepts]: Start accepts. Automaton has 13016 states and 50159 transitions. Word has length 30 [2022-03-15 17:01:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:44,799 INFO L470 AbstractCegarLoop]: Abstraction has 13016 states and 50159 transitions. [2022-03-15 17:01:44,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:44,799 INFO L276 IsEmpty]: Start isEmpty. Operand 13016 states and 50159 transitions. [2022-03-15 17:01:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:44,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:44,824 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:44,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:45,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:45,025 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:45,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1442224409, now seen corresponding path program 56 times [2022-03-15 17:01:45,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:45,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250209806] [2022-03-15 17:01:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:45,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:45,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:45,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250209806] [2022-03-15 17:01:45,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250209806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:45,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632907015] [2022-03-15 17:01:45,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:01:45,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:45,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:45,065 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:45,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 17:01:45,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:01:45,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:45,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:01:45,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:01:45,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:45,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632907015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:45,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:45,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 15 [2022-03-15 17:01:45,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340522219] [2022-03-15 17:01:45,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:45,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 17:01:45,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:45,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 17:01:45,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-03-15 17:01:45,289 INFO L87 Difference]: Start difference. First operand 13016 states and 50159 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:46,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:46,403 INFO L93 Difference]: Finished difference Result 23852 states and 84334 transitions. [2022-03-15 17:01:46,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-15 17:01:46,403 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:46,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:46,468 INFO L225 Difference]: With dead ends: 23852 [2022-03-15 17:01:46,468 INFO L226 Difference]: Without dead ends: 23840 [2022-03-15 17:01:46,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2356 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1293, Invalid=4869, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 17:01:46,469 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 602 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:46,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 276 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 17:01:46,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23840 states. [2022-03-15 17:01:46,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23840 to 12938. [2022-03-15 17:01:46,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12938 states, 12937 states have (on average 3.859472829867821) internal successors, (49930), 12937 states have internal predecessors, (49930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12938 states to 12938 states and 49930 transitions. [2022-03-15 17:01:46,982 INFO L78 Accepts]: Start accepts. Automaton has 12938 states and 49930 transitions. Word has length 30 [2022-03-15 17:01:46,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:46,982 INFO L470 AbstractCegarLoop]: Abstraction has 12938 states and 49930 transitions. [2022-03-15 17:01:46,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:46,982 INFO L276 IsEmpty]: Start isEmpty. Operand 12938 states and 49930 transitions. [2022-03-15 17:01:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:47,006 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:47,006 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:47,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-15 17:01:47,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-15 17:01:47,207 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:47,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:47,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1246161191, now seen corresponding path program 57 times [2022-03-15 17:01:47,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:47,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828951498] [2022-03-15 17:01:47,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:47,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:47,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:47,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828951498] [2022-03-15 17:01:47,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828951498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:47,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718264689] [2022-03-15 17:01:47,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:01:47,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:47,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:47,256 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:47,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 17:01:47,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 17:01:47,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:47,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:01:47,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:01:47,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:47,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718264689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:47,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:47,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-03-15 17:01:47,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814644178] [2022-03-15 17:01:47,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:47,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 17:01:47,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:47,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 17:01:47,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-15 17:01:47,486 INFO L87 Difference]: Start difference. First operand 12938 states and 49930 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:48,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:48,355 INFO L93 Difference]: Finished difference Result 22366 states and 80695 transitions. [2022-03-15 17:01:48,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 17:01:48,355 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:48,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:48,420 INFO L225 Difference]: With dead ends: 22366 [2022-03-15 17:01:48,420 INFO L226 Difference]: Without dead ends: 22334 [2022-03-15 17:01:48,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=911, Invalid=3511, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 17:01:48,421 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 470 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:48,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 225 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 17:01:48,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22334 states. [2022-03-15 17:01:48,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22334 to 12881. [2022-03-15 17:01:48,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12881 states, 12880 states have (on average 3.864829192546584) internal successors, (49779), 12880 states have internal predecessors, (49779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:48,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12881 states to 12881 states and 49779 transitions. [2022-03-15 17:01:48,914 INFO L78 Accepts]: Start accepts. Automaton has 12881 states and 49779 transitions. Word has length 30 [2022-03-15 17:01:48,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:48,914 INFO L470 AbstractCegarLoop]: Abstraction has 12881 states and 49779 transitions. [2022-03-15 17:01:48,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:48,914 INFO L276 IsEmpty]: Start isEmpty. Operand 12881 states and 49779 transitions. [2022-03-15 17:01:48,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:48,944 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:48,944 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:48,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-15 17:01:49,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:49,145 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:49,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:49,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1525545573, now seen corresponding path program 58 times [2022-03-15 17:01:49,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:49,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939879943] [2022-03-15 17:01:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:49,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:01:49,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:49,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939879943] [2022-03-15 17:01:49,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939879943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:49,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62053861] [2022-03-15 17:01:49,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:01:49,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:49,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:49,186 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:49,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 17:01:49,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:01:49,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:49,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 17:01:49,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:01:49,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:01:49,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62053861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:49,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:49,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-03-15 17:01:49,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140735264] [2022-03-15 17:01:49,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:49,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 17:01:49,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:49,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 17:01:49,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-15 17:01:49,390 INFO L87 Difference]: Start difference. First operand 12881 states and 49779 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:49,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:49,690 INFO L93 Difference]: Finished difference Result 14655 states and 54802 transitions. [2022-03-15 17:01:49,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 17:01:49,691 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:49,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:49,731 INFO L225 Difference]: With dead ends: 14655 [2022-03-15 17:01:49,731 INFO L226 Difference]: Without dead ends: 14655 [2022-03-15 17:01:49,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2022-03-15 17:01:49,732 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 186 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:49,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 82 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 17:01:49,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14655 states. [2022-03-15 17:01:50,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14655 to 12646. [2022-03-15 17:01:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12646 states, 12645 states have (on average 3.868880980624753) internal successors, (48922), 12645 states have internal predecessors, (48922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:50,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12646 states to 12646 states and 48922 transitions. [2022-03-15 17:01:50,069 INFO L78 Accepts]: Start accepts. Automaton has 12646 states and 48922 transitions. Word has length 30 [2022-03-15 17:01:50,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:50,069 INFO L470 AbstractCegarLoop]: Abstraction has 12646 states and 48922 transitions. [2022-03-15 17:01:50,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:50,070 INFO L276 IsEmpty]: Start isEmpty. Operand 12646 states and 48922 transitions. [2022-03-15 17:01:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:50,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:50,096 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:50,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:50,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:50,296 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:50,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:50,297 INFO L85 PathProgramCache]: Analyzing trace with hash -435342281, now seen corresponding path program 59 times [2022-03-15 17:01:50,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:50,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881071015] [2022-03-15 17:01:50,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:50,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:50,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:50,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881071015] [2022-03-15 17:01:50,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881071015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:50,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005794570] [2022-03-15 17:01:50,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:01:50,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:50,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:50,344 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:50,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 17:01:50,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 17:01:50,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:50,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:01:50,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:50,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:50,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005794570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:50,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:50,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-03-15 17:01:50,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542578447] [2022-03-15 17:01:50,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:50,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 17:01:50,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:50,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 17:01:50,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-15 17:01:50,557 INFO L87 Difference]: Start difference. First operand 12646 states and 48922 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:51,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:51,480 INFO L93 Difference]: Finished difference Result 21690 states and 78211 transitions. [2022-03-15 17:01:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 17:01:51,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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 30 [2022-03-15 17:01:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:51,545 INFO L225 Difference]: With dead ends: 21690 [2022-03-15 17:01:51,545 INFO L226 Difference]: Without dead ends: 21690 [2022-03-15 17:01:51,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=3129, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 17:01:51,546 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 398 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:51,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 308 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 17:01:51,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21690 states. [2022-03-15 17:01:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21690 to 13376. [2022-03-15 17:01:51,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13376 states, 13375 states have (on average 3.8450841121495327) internal successors, (51428), 13375 states have internal predecessors, (51428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13376 states to 13376 states and 51428 transitions. [2022-03-15 17:01:52,019 INFO L78 Accepts]: Start accepts. Automaton has 13376 states and 51428 transitions. Word has length 30 [2022-03-15 17:01:52,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:52,019 INFO L470 AbstractCegarLoop]: Abstraction has 13376 states and 51428 transitions. [2022-03-15 17:01:52,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:52,019 INFO L276 IsEmpty]: Start isEmpty. Operand 13376 states and 51428 transitions. [2022-03-15 17:01:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:52,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:52,047 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:52,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-15 17:01:52,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:52,247 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:52,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:52,248 INFO L85 PathProgramCache]: Analyzing trace with hash 96564033, now seen corresponding path program 60 times [2022-03-15 17:01:52,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:52,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296185218] [2022-03-15 17:01:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:52,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:52,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:52,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296185218] [2022-03-15 17:01:52,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296185218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:52,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22587374] [2022-03-15 17:01:52,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:01:52,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:52,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:52,290 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:52,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 17:01:52,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 17:01:52,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:52,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:01:52,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:52,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:52,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22587374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:52,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:52,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 17:01:52,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027728688] [2022-03-15 17:01:52,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:52,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 17:01:52,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:52,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 17:01:52,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-15 17:01:52,498 INFO L87 Difference]: Start difference. First operand 13376 states and 51428 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:53,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:53,225 INFO L93 Difference]: Finished difference Result 20800 states and 75794 transitions. [2022-03-15 17:01:53,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 17:01:53,225 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:53,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:53,282 INFO L225 Difference]: With dead ends: 20800 [2022-03-15 17:01:53,283 INFO L226 Difference]: Without dead ends: 20788 [2022-03-15 17:01:53,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=608, Invalid=2044, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 17:01:53,283 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 382 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:53,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 235 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 17:01:53,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20788 states. [2022-03-15 17:01:53,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20788 to 13222. [2022-03-15 17:01:53,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13222 states, 13221 states have (on average 3.855911050601316) internal successors, (50979), 13221 states have internal predecessors, (50979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13222 states to 13222 states and 50979 transitions. [2022-03-15 17:01:53,638 INFO L78 Accepts]: Start accepts. Automaton has 13222 states and 50979 transitions. Word has length 30 [2022-03-15 17:01:53,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:53,638 INFO L470 AbstractCegarLoop]: Abstraction has 13222 states and 50979 transitions. [2022-03-15 17:01:53,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:53,638 INFO L276 IsEmpty]: Start isEmpty. Operand 13222 states and 50979 transitions. [2022-03-15 17:01:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:53,664 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:53,664 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:53,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-15 17:01:53,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:53,865 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:53,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:53,865 INFO L85 PathProgramCache]: Analyzing trace with hash -542841171, now seen corresponding path program 61 times [2022-03-15 17:01:53,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:53,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103311047] [2022-03-15 17:01:53,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:53,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:53,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:53,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103311047] [2022-03-15 17:01:53,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103311047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:53,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736185001] [2022-03-15 17:01:53,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:01:53,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:53,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:53,975 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:53,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 17:01:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:54,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:01:54,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:54,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:54,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736185001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:54,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:54,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-03-15 17:01:54,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876279592] [2022-03-15 17:01:54,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:54,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 17:01:54,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:54,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 17:01:54,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-15 17:01:54,200 INFO L87 Difference]: Start difference. First operand 13222 states and 50979 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:54,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:54,926 INFO L93 Difference]: Finished difference Result 20946 states and 76381 transitions. [2022-03-15 17:01:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 17:01:54,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:54,988 INFO L225 Difference]: With dead ends: 20946 [2022-03-15 17:01:54,988 INFO L226 Difference]: Without dead ends: 20926 [2022-03-15 17:01:54,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=574, Invalid=2182, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 17:01:54,989 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 390 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:54,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 233 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 17:01:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20926 states. [2022-03-15 17:01:55,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20926 to 13408. [2022-03-15 17:01:55,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13408 states, 13407 states have (on average 3.8412769448795405) internal successors, (51500), 13407 states have internal predecessors, (51500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:55,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13408 states to 13408 states and 51500 transitions. [2022-03-15 17:01:55,408 INFO L78 Accepts]: Start accepts. Automaton has 13408 states and 51500 transitions. Word has length 30 [2022-03-15 17:01:55,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:55,408 INFO L470 AbstractCegarLoop]: Abstraction has 13408 states and 51500 transitions. [2022-03-15 17:01:55,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:55,409 INFO L276 IsEmpty]: Start isEmpty. Operand 13408 states and 51500 transitions. [2022-03-15 17:01:55,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:55,434 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:55,434 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:55,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-15 17:01:55,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:55,635 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:55,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:55,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1968514673, now seen corresponding path program 62 times [2022-03-15 17:01:55,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:55,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964512779] [2022-03-15 17:01:55,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:55,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:55,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:55,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964512779] [2022-03-15 17:01:55,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964512779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:55,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800395820] [2022-03-15 17:01:55,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:01:55,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:55,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:55,690 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:55,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 17:01:55,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:01:55,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:55,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:01:55,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:55,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:55,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800395820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:55,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:55,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 17:01:55,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117933241] [2022-03-15 17:01:55,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:55,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 17:01:55,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:55,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 17:01:55,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-03-15 17:01:55,979 INFO L87 Difference]: Start difference. First operand 13408 states and 51500 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:57,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:57,931 INFO L93 Difference]: Finished difference Result 19415 states and 69884 transitions. [2022-03-15 17:01:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-15 17:01:57,931 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:01:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:57,988 INFO L225 Difference]: With dead ends: 19415 [2022-03-15 17:01:57,989 INFO L226 Difference]: Without dead ends: 19415 [2022-03-15 17:01:57,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4263 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2280, Invalid=9276, Unknown=0, NotChecked=0, Total=11556 [2022-03-15 17:01:57,990 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 492 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:57,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 456 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:01:58,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19415 states. [2022-03-15 17:01:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19415 to 14051. [2022-03-15 17:01:58,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14051 states, 14050 states have (on average 3.817224199288256) internal successors, (53632), 14050 states have internal predecessors, (53632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:58,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14051 states to 14051 states and 53632 transitions. [2022-03-15 17:01:58,356 INFO L78 Accepts]: Start accepts. Automaton has 14051 states and 53632 transitions. Word has length 30 [2022-03-15 17:01:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:58,356 INFO L470 AbstractCegarLoop]: Abstraction has 14051 states and 53632 transitions. [2022-03-15 17:01:58,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 14051 states and 53632 transitions. [2022-03-15 17:01:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:01:58,384 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:58,384 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:58,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-15 17:01:58,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-15 17:01:58,584 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:01:58,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:58,584 INFO L85 PathProgramCache]: Analyzing trace with hash -341365967, now seen corresponding path program 63 times [2022-03-15 17:01:58,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:58,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477658109] [2022-03-15 17:01:58,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:58,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:58,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:58,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477658109] [2022-03-15 17:01:58,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477658109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:58,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687758361] [2022-03-15 17:01:58,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:01:58,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:58,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:58,635 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:58,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 17:01:58,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 17:01:58,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:58,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:01:58,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:58,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:58,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687758361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:58,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:58,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-03-15 17:01:58,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893097682] [2022-03-15 17:01:58,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:58,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 17:01:58,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:58,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 17:01:58,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-03-15 17:01:58,925 INFO L87 Difference]: Start difference. First operand 14051 states and 53632 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:00,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:00,393 INFO L93 Difference]: Finished difference Result 18580 states and 67695 transitions. [2022-03-15 17:02:00,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 17:02:00,393 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:00,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:00,447 INFO L225 Difference]: With dead ends: 18580 [2022-03-15 17:02:00,447 INFO L226 Difference]: Without dead ends: 18572 [2022-03-15 17:02:00,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2359 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1558, Invalid=5582, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 17:02:00,448 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 410 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:00,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 308 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:02:00,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18572 states. [2022-03-15 17:02:00,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18572 to 13997. [2022-03-15 17:02:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13997 states, 13996 states have (on average 3.819734209774221) internal successors, (53461), 13996 states have internal predecessors, (53461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13997 states to 13997 states and 53461 transitions. [2022-03-15 17:02:00,834 INFO L78 Accepts]: Start accepts. Automaton has 13997 states and 53461 transitions. Word has length 30 [2022-03-15 17:02:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:00,834 INFO L470 AbstractCegarLoop]: Abstraction has 13997 states and 53461 transitions. [2022-03-15 17:02:00,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 13997 states and 53461 transitions. [2022-03-15 17:02:00,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:00,863 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:00,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:00,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-15 17:02:01,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:01,063 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:02:01,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:01,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1508609255, now seen corresponding path program 64 times [2022-03-15 17:02:01,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:01,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526136959] [2022-03-15 17:02:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:01,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:01,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:01,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526136959] [2022-03-15 17:02:01,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526136959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:01,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870451250] [2022-03-15 17:02:01,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:02:01,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:01,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:01,115 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:01,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 17:02:01,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:02:01,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:01,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:02:01,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:01,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:01,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870451250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:01,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:01,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-03-15 17:02:01,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671067871] [2022-03-15 17:02:01,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:01,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 17:02:01,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:01,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 17:02:01,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-03-15 17:02:01,435 INFO L87 Difference]: Start difference. First operand 13997 states and 53461 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:03,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:03,243 INFO L93 Difference]: Finished difference Result 20422 states and 72750 transitions. [2022-03-15 17:02:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-15 17:02:03,243 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:03,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:03,294 INFO L225 Difference]: With dead ends: 20422 [2022-03-15 17:02:03,294 INFO L226 Difference]: Without dead ends: 20422 [2022-03-15 17:02:03,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4394 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2164, Invalid=8966, Unknown=0, NotChecked=0, Total=11130 [2022-03-15 17:02:03,295 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 572 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:03,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 489 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:02:03,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20422 states. [2022-03-15 17:02:03,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20422 to 14517. [2022-03-15 17:02:03,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14517 states, 14516 states have (on average 3.8018049049324882) internal successors, (55187), 14516 states have internal predecessors, (55187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:03,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14517 states to 14517 states and 55187 transitions. [2022-03-15 17:02:03,658 INFO L78 Accepts]: Start accepts. Automaton has 14517 states and 55187 transitions. Word has length 30 [2022-03-15 17:02:03,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:03,658 INFO L470 AbstractCegarLoop]: Abstraction has 14517 states and 55187 transitions. [2022-03-15 17:02:03,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:03,658 INFO L276 IsEmpty]: Start isEmpty. Operand 14517 states and 55187 transitions. [2022-03-15 17:02:03,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:03,686 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:03,686 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:03,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-15 17:02:03,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:03,887 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:02:03,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:03,887 INFO L85 PathProgramCache]: Analyzing trace with hash 453231861, now seen corresponding path program 65 times [2022-03-15 17:02:03,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:03,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678126980] [2022-03-15 17:02:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:03,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:03,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:03,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678126980] [2022-03-15 17:02:03,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678126980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:03,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818174535] [2022-03-15 17:02:03,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:02:03,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:03,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:03,953 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:03,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 17:02:04,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 17:02:04,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:04,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:02:04,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:04,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:04,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818174535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:04,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:04,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-03-15 17:02:04,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325810050] [2022-03-15 17:02:04,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:04,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 17:02:04,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:04,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 17:02:04,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-03-15 17:02:04,246 INFO L87 Difference]: Start difference. First operand 14517 states and 55187 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:05,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:05,591 INFO L93 Difference]: Finished difference Result 19474 states and 70379 transitions. [2022-03-15 17:02:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-15 17:02:05,591 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:05,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:05,642 INFO L225 Difference]: With dead ends: 19474 [2022-03-15 17:02:05,643 INFO L226 Difference]: Without dead ends: 19466 [2022-03-15 17:02:05,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1617, Invalid=6215, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 17:02:05,644 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 508 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:05,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 323 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:02:05,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19466 states. [2022-03-15 17:02:06,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19466 to 14517. [2022-03-15 17:02:06,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14517 states, 14516 states have (on average 3.8015293469275284) internal successors, (55183), 14516 states have internal predecessors, (55183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14517 states to 14517 states and 55183 transitions. [2022-03-15 17:02:06,146 INFO L78 Accepts]: Start accepts. Automaton has 14517 states and 55183 transitions. Word has length 30 [2022-03-15 17:02:06,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:06,146 INFO L470 AbstractCegarLoop]: Abstraction has 14517 states and 55183 transitions. [2022-03-15 17:02:06,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 14517 states and 55183 transitions. [2022-03-15 17:02:06,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:06,175 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:06,175 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:06,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-15 17:02:06,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:06,376 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:02:06,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:06,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1936366799, now seen corresponding path program 66 times [2022-03-15 17:02:06,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:06,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005260461] [2022-03-15 17:02:06,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:06,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:06,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:06,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005260461] [2022-03-15 17:02:06,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005260461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:06,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613682041] [2022-03-15 17:02:06,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:02:06,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:06,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:06,426 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:06,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 17:02:06,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 17:02:06,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:06,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:02:06,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:06,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:06,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613682041] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:06,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:06,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-03-15 17:02:06,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095083519] [2022-03-15 17:02:06,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:06,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 17:02:06,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:06,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 17:02:06,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-03-15 17:02:06,689 INFO L87 Difference]: Start difference. First operand 14517 states and 55183 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:07,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:07,915 INFO L93 Difference]: Finished difference Result 19234 states and 69889 transitions. [2022-03-15 17:02:07,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-15 17:02:07,916 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:07,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:07,992 INFO L225 Difference]: With dead ends: 19234 [2022-03-15 17:02:07,992 INFO L226 Difference]: Without dead ends: 19210 [2022-03-15 17:02:07,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1170, Invalid=4530, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 17:02:07,993 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 456 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:07,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 320 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:02:08,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19210 states. [2022-03-15 17:02:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19210 to 14517. [2022-03-15 17:02:08,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14517 states, 14516 states have (on average 3.8009782309176083) internal successors, (55175), 14516 states have internal predecessors, (55175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14517 states to 14517 states and 55175 transitions. [2022-03-15 17:02:08,387 INFO L78 Accepts]: Start accepts. Automaton has 14517 states and 55175 transitions. Word has length 30 [2022-03-15 17:02:08,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:08,388 INFO L470 AbstractCegarLoop]: Abstraction has 14517 states and 55175 transitions. [2022-03-15 17:02:08,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:08,388 INFO L276 IsEmpty]: Start isEmpty. Operand 14517 states and 55175 transitions. [2022-03-15 17:02:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:08,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:08,417 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:08,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-15 17:02:08,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:08,617 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:02:08,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:08,618 INFO L85 PathProgramCache]: Analyzing trace with hash -812528685, now seen corresponding path program 67 times [2022-03-15 17:02:08,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:08,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234330690] [2022-03-15 17:02:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:08,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:08,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:08,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234330690] [2022-03-15 17:02:08,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234330690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:08,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281301365] [2022-03-15 17:02:08,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:02:08,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:08,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:08,670 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:08,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 17:02:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:08,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:02:08,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:08,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:08,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281301365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:08,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:08,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-15 17:02:08,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061275998] [2022-03-15 17:02:08,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:08,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 17:02:08,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:08,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 17:02:08,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:02:08,926 INFO L87 Difference]: Start difference. First operand 14517 states and 55175 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:10,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:10,064 INFO L93 Difference]: Finished difference Result 18899 states and 68968 transitions. [2022-03-15 17:02:10,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 17:02:10,064 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:10,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:10,117 INFO L225 Difference]: With dead ends: 18899 [2022-03-15 17:02:10,117 INFO L226 Difference]: Without dead ends: 18863 [2022-03-15 17:02:10,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1026, Invalid=3944, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 17:02:10,118 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 300 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:10,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 288 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:02:10,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18863 states. [2022-03-15 17:02:10,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18863 to 14621. [2022-03-15 17:02:10,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14621 states, 14620 states have (on average 3.7988372093023255) internal successors, (55539), 14620 states have internal predecessors, (55539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:10,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14621 states to 14621 states and 55539 transitions. [2022-03-15 17:02:10,476 INFO L78 Accepts]: Start accepts. Automaton has 14621 states and 55539 transitions. Word has length 30 [2022-03-15 17:02:10,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:10,476 INFO L470 AbstractCegarLoop]: Abstraction has 14621 states and 55539 transitions. [2022-03-15 17:02:10,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:10,476 INFO L276 IsEmpty]: Start isEmpty. Operand 14621 states and 55539 transitions. [2022-03-15 17:02:10,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:10,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:10,503 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:10,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-15 17:02:10,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:10,704 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:02:10,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:10,704 INFO L85 PathProgramCache]: Analyzing trace with hash 907843979, now seen corresponding path program 68 times [2022-03-15 17:02:10,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:10,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065426253] [2022-03-15 17:02:10,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:10,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:10,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:10,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065426253] [2022-03-15 17:02:10,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065426253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:10,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115961627] [2022-03-15 17:02:10,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:02:10,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:10,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:10,759 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:10,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 17:02:10,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:02:10,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:10,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:02:10,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:10,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:02:11,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115961627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:11,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:11,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-03-15 17:02:11,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551051889] [2022-03-15 17:02:11,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:11,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 17:02:11,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:11,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 17:02:11,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-03-15 17:02:11,061 INFO L87 Difference]: Start difference. First operand 14621 states and 55539 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:15,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:15,047 INFO L93 Difference]: Finished difference Result 30029 states and 104622 transitions. [2022-03-15 17:02:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-03-15 17:02:15,047 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:15,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:15,133 INFO L225 Difference]: With dead ends: 30029 [2022-03-15 17:02:15,133 INFO L226 Difference]: Without dead ends: 30029 [2022-03-15 17:02:15,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18427 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7199, Invalid=34621, Unknown=0, NotChecked=0, Total=41820 [2022-03-15 17:02:15,135 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 821 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:15,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 633 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 17:02:15,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30029 states. [2022-03-15 17:02:15,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30029 to 16135. [2022-03-15 17:02:15,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16135 states, 16134 states have (on average 3.829738440560307) internal successors, (61789), 16134 states have internal predecessors, (61789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:15,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16135 states to 16135 states and 61789 transitions. [2022-03-15 17:02:15,672 INFO L78 Accepts]: Start accepts. Automaton has 16135 states and 61789 transitions. Word has length 30 [2022-03-15 17:02:15,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:15,672 INFO L470 AbstractCegarLoop]: Abstraction has 16135 states and 61789 transitions. [2022-03-15 17:02:15,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:15,673 INFO L276 IsEmpty]: Start isEmpty. Operand 16135 states and 61789 transitions. [2022-03-15 17:02:15,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:15,702 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:15,702 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:15,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-15 17:02:15,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-15 17:02:15,903 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:02:15,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:15,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1495589301, now seen corresponding path program 69 times [2022-03-15 17:02:15,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:15,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142180291] [2022-03-15 17:02:15,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:15,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:15,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:15,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142180291] [2022-03-15 17:02:15,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142180291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:15,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863721849] [2022-03-15 17:02:15,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:02:15,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:15,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:15,951 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:15,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 17:02:16,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 17:02:16,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:16,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 17:02:16,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:16,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:02:16,267 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 17:02:16,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 17:02:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:02:16,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:16,577 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 17:02:16,577 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 17 treesize of output 26 [2022-03-15 17:02:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:02:16,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863721849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:16,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:16,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-03-15 17:02:16,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412935883] [2022-03-15 17:02:16,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:16,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 17:02:16,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:16,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 17:02:16,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2022-03-15 17:02:16,824 INFO L87 Difference]: Start difference. First operand 16135 states and 61789 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 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) [2022-03-15 17:02:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:22,008 INFO L93 Difference]: Finished difference Result 25546 states and 92153 transitions. [2022-03-15 17:02:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-03-15 17:02:22,008 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 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 30 [2022-03-15 17:02:22,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:22,090 INFO L225 Difference]: With dead ends: 25546 [2022-03-15 17:02:22,091 INFO L226 Difference]: Without dead ends: 25465 [2022-03-15 17:02:22,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12999 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3381, Invalid=28125, Unknown=0, NotChecked=0, Total=31506 [2022-03-15 17:02:22,094 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 886 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 3651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1389 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:22,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 1177 Invalid, 3651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2085 Invalid, 0 Unknown, 1389 Unchecked, 0.9s Time] [2022-03-15 17:02:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25465 states. [2022-03-15 17:02:22,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25465 to 16044. [2022-03-15 17:02:22,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16044 states, 16043 states have (on average 3.840304182509506) internal successors, (61610), 16043 states have internal predecessors, (61610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:22,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16044 states to 16044 states and 61610 transitions. [2022-03-15 17:02:22,597 INFO L78 Accepts]: Start accepts. Automaton has 16044 states and 61610 transitions. Word has length 30 [2022-03-15 17:02:22,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:22,598 INFO L470 AbstractCegarLoop]: Abstraction has 16044 states and 61610 transitions. [2022-03-15 17:02:22,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 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) [2022-03-15 17:02:22,598 INFO L276 IsEmpty]: Start isEmpty. Operand 16044 states and 61610 transitions. [2022-03-15 17:02:22,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:22,630 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:22,631 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:22,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-15 17:02:22,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-15 17:02:22,831 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:02:22,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:22,831 INFO L85 PathProgramCache]: Analyzing trace with hash -759533131, now seen corresponding path program 70 times [2022-03-15 17:02:22,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:22,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812616735] [2022-03-15 17:02:22,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:22,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:22,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:22,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812616735] [2022-03-15 17:02:22,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812616735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:22,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132240580] [2022-03-15 17:02:22,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:02:22,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:22,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:22,880 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:22,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 17:02:22,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:02:22,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:22,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:02:22,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:23,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:02:23,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132240580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:23,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:23,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-03-15 17:02:23,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052634911] [2022-03-15 17:02:23,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:23,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 17:02:23,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:23,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 17:02:23,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-15 17:02:23,186 INFO L87 Difference]: Start difference. First operand 16044 states and 61610 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:26,994 INFO L93 Difference]: Finished difference Result 39563 states and 138975 transitions. [2022-03-15 17:02:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-03-15 17:02:26,994 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:27,143 INFO L225 Difference]: With dead ends: 39563 [2022-03-15 17:02:27,143 INFO L226 Difference]: Without dead ends: 39563 [2022-03-15 17:02:27,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16013 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7311, Invalid=28979, Unknown=0, NotChecked=0, Total=36290 [2022-03-15 17:02:27,148 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 827 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 2162 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 2298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:27,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 650 Invalid, 2298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2162 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 17:02:27,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39563 states. [2022-03-15 17:02:27,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39563 to 16139. [2022-03-15 17:02:27,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16139 states, 16138 states have (on average 3.849485685958607) internal successors, (62123), 16138 states have internal predecessors, (62123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16139 states to 16139 states and 62123 transitions. [2022-03-15 17:02:27,981 INFO L78 Accepts]: Start accepts. Automaton has 16139 states and 62123 transitions. Word has length 30 [2022-03-15 17:02:27,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:27,981 INFO L470 AbstractCegarLoop]: Abstraction has 16139 states and 62123 transitions. [2022-03-15 17:02:27,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:27,982 INFO L276 IsEmpty]: Start isEmpty. Operand 16139 states and 62123 transitions. [2022-03-15 17:02:28,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:28,012 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:28,012 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:28,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-15 17:02:28,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:28,213 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:02:28,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:28,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1299570705, now seen corresponding path program 71 times [2022-03-15 17:02:28,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:28,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383474370] [2022-03-15 17:02:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:28,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:28,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:28,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383474370] [2022-03-15 17:02:28,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383474370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:28,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437184731] [2022-03-15 17:02:28,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:02:28,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:28,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:28,274 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:28,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-15 17:02:28,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 17:02:28,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:28,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:02:28,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:28,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:02:28,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437184731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:28,578 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:28,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-03-15 17:02:28,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214189854] [2022-03-15 17:02:28,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:28,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 17:02:28,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:28,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 17:02:28,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-15 17:02:28,579 INFO L87 Difference]: Start difference. First operand 16139 states and 62123 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:33,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:33,032 INFO L93 Difference]: Finished difference Result 39410 states and 139201 transitions. [2022-03-15 17:02:33,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2022-03-15 17:02:33,032 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:33,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:33,173 INFO L225 Difference]: With dead ends: 39410 [2022-03-15 17:02:33,173 INFO L226 Difference]: Without dead ends: 39410 [2022-03-15 17:02:33,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22928 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9003, Invalid=42299, Unknown=0, NotChecked=0, Total=51302 [2022-03-15 17:02:33,180 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 887 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 2013 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 2197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:33,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 656 Invalid, 2197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2013 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 17:02:33,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39410 states. [2022-03-15 17:02:33,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39410 to 15793. [2022-03-15 17:02:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15793 states, 15792 states have (on average 3.83314336372847) internal successors, (60533), 15792 states have internal predecessors, (60533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:33,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15793 states to 15793 states and 60533 transitions. [2022-03-15 17:02:33,946 INFO L78 Accepts]: Start accepts. Automaton has 15793 states and 60533 transitions. Word has length 30 [2022-03-15 17:02:33,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:33,946 INFO L470 AbstractCegarLoop]: Abstraction has 15793 states and 60533 transitions. [2022-03-15 17:02:33,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:33,946 INFO L276 IsEmpty]: Start isEmpty. Operand 15793 states and 60533 transitions. [2022-03-15 17:02:33,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:33,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:33,975 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:33,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-15 17:02:34,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:34,175 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:02:34,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:34,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1712540267, now seen corresponding path program 72 times [2022-03-15 17:02:34,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:34,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364891061] [2022-03-15 17:02:34,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:34,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:34,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:34,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364891061] [2022-03-15 17:02:34,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364891061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:34,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967626032] [2022-03-15 17:02:34,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:02:34,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:34,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:34,224 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:34,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-15 17:02:34,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 17:02:34,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:34,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:02:34,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:34,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:34,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967626032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:34,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:34,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 17:02:34,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182598961] [2022-03-15 17:02:34,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:34,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 17:02:34,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:34,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 17:02:34,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-03-15 17:02:34,548 INFO L87 Difference]: Start difference. First operand 15793 states and 60533 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:37,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:37,460 INFO L93 Difference]: Finished difference Result 32331 states and 115471 transitions. [2022-03-15 17:02:37,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-03-15 17:02:37,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:37,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:37,569 INFO L225 Difference]: With dead ends: 32331 [2022-03-15 17:02:37,569 INFO L226 Difference]: Without dead ends: 32331 [2022-03-15 17:02:37,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10220 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4495, Invalid=19375, Unknown=0, NotChecked=0, Total=23870 [2022-03-15 17:02:37,570 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 845 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:37,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 649 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:02:37,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32331 states. [2022-03-15 17:02:38,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32331 to 18359. [2022-03-15 17:02:38,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18359 states, 18358 states have (on average 3.830591567708901) internal successors, (70322), 18358 states have internal predecessors, (70322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:38,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18359 states to 18359 states and 70322 transitions. [2022-03-15 17:02:38,196 INFO L78 Accepts]: Start accepts. Automaton has 18359 states and 70322 transitions. Word has length 30 [2022-03-15 17:02:38,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:38,196 INFO L470 AbstractCegarLoop]: Abstraction has 18359 states and 70322 transitions. [2022-03-15 17:02:38,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:38,197 INFO L276 IsEmpty]: Start isEmpty. Operand 18359 states and 70322 transitions. [2022-03-15 17:02:38,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:38,234 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:38,234 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:38,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-15 17:02:38,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-15 17:02:38,435 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:02:38,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:38,435 INFO L85 PathProgramCache]: Analyzing trace with hash 657162873, now seen corresponding path program 73 times [2022-03-15 17:02:38,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:38,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187374887] [2022-03-15 17:02:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:38,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:38,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:38,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187374887] [2022-03-15 17:02:38,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187374887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:38,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614898858] [2022-03-15 17:02:38,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:02:38,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:38,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:38,491 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:38,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-15 17:02:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:38,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:02:38,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:38,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:38,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614898858] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:38,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:38,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 17:02:38,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305404589] [2022-03-15 17:02:38,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:38,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 17:02:38,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:38,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 17:02:38,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-03-15 17:02:38,802 INFO L87 Difference]: Start difference. First operand 18359 states and 70322 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:41,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:41,623 INFO L93 Difference]: Finished difference Result 33551 states and 121071 transitions. [2022-03-15 17:02:41,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-03-15 17:02:41,623 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:41,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:41,740 INFO L225 Difference]: With dead ends: 33551 [2022-03-15 17:02:41,741 INFO L226 Difference]: Without dead ends: 33539 [2022-03-15 17:02:41,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9441 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4177, Invalid=18473, Unknown=0, NotChecked=0, Total=22650 [2022-03-15 17:02:41,743 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 851 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:41,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 523 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:02:41,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33539 states. [2022-03-15 17:02:42,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33539 to 17993. [2022-03-15 17:02:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17993 states, 17992 states have (on average 3.842207647843486) internal successors, (69129), 17992 states have internal predecessors, (69129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:42,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17993 states to 17993 states and 69129 transitions. [2022-03-15 17:02:42,430 INFO L78 Accepts]: Start accepts. Automaton has 17993 states and 69129 transitions. Word has length 30 [2022-03-15 17:02:42,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:42,430 INFO L470 AbstractCegarLoop]: Abstraction has 17993 states and 69129 transitions. [2022-03-15 17:02:42,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:42,430 INFO L276 IsEmpty]: Start isEmpty. Operand 17993 states and 69129 transitions. [2022-03-15 17:02:42,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:42,467 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:42,467 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:42,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-15 17:02:42,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:42,667 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:02:42,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:42,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2140297811, now seen corresponding path program 74 times [2022-03-15 17:02:42,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:42,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835914566] [2022-03-15 17:02:42,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:42,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:42,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:42,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835914566] [2022-03-15 17:02:42,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835914566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:42,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758656838] [2022-03-15 17:02:42,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:02:42,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:42,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:42,719 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:42,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-15 17:02:42,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:02:42,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:42,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:02:42,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:42,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:43,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758656838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:43,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:43,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 17:02:43,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018386636] [2022-03-15 17:02:43,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:43,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 17:02:43,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:43,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 17:02:43,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-03-15 17:02:43,010 INFO L87 Difference]: Start difference. First operand 17993 states and 69129 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:45,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:45,357 INFO L93 Difference]: Finished difference Result 33062 states and 119951 transitions. [2022-03-15 17:02:45,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-03-15 17:02:45,357 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:45,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:45,472 INFO L225 Difference]: With dead ends: 33062 [2022-03-15 17:02:45,472 INFO L226 Difference]: Without dead ends: 33026 [2022-03-15 17:02:45,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6665 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3024, Invalid=13746, Unknown=0, NotChecked=0, Total=16770 [2022-03-15 17:02:45,474 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 660 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:45,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 434 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:02:45,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33026 states. [2022-03-15 17:02:46,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33026 to 17977. [2022-03-15 17:02:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17977 states, 17976 states have (on average 3.8412883845126835) internal successors, (69051), 17976 states have internal predecessors, (69051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:46,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17977 states to 17977 states and 69051 transitions. [2022-03-15 17:02:46,128 INFO L78 Accepts]: Start accepts. Automaton has 17977 states and 69051 transitions. Word has length 30 [2022-03-15 17:02:46,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:46,128 INFO L470 AbstractCegarLoop]: Abstraction has 17977 states and 69051 transitions. [2022-03-15 17:02:46,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:46,128 INFO L276 IsEmpty]: Start isEmpty. Operand 17977 states and 69051 transitions. [2022-03-15 17:02:46,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:46,164 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:46,164 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:46,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-15 17:02:46,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:46,365 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:02:46,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:46,365 INFO L85 PathProgramCache]: Analyzing trace with hash -608597673, now seen corresponding path program 75 times [2022-03-15 17:02:46,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:46,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894241412] [2022-03-15 17:02:46,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:46,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:46,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:46,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894241412] [2022-03-15 17:02:46,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894241412] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:46,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535366217] [2022-03-15 17:02:46,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:02:46,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:46,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:46,413 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:46,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-15 17:02:46,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 17:02:46,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:46,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:02:46,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:46,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:46,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535366217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:46,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:46,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-15 17:02:46,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190954602] [2022-03-15 17:02:46,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:46,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 17:02:46,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:46,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 17:02:46,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-03-15 17:02:46,745 INFO L87 Difference]: Start difference. First operand 17977 states and 69051 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:48,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:48,544 INFO L93 Difference]: Finished difference Result 32074 states and 117370 transitions. [2022-03-15 17:02:48,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-15 17:02:48,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:48,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:48,649 INFO L225 Difference]: With dead ends: 32074 [2022-03-15 17:02:48,650 INFO L226 Difference]: Without dead ends: 32038 [2022-03-15 17:02:48,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4230 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2126, Invalid=9004, Unknown=0, NotChecked=0, Total=11130 [2022-03-15 17:02:48,651 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 548 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:48,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 323 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:02:48,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32038 states. [2022-03-15 17:02:49,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32038 to 17959. [2022-03-15 17:02:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17959 states, 17958 states have (on average 3.8416304710992315) internal successors, (68988), 17958 states have internal predecessors, (68988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17959 states to 17959 states and 68988 transitions. [2022-03-15 17:02:49,260 INFO L78 Accepts]: Start accepts. Automaton has 17959 states and 68988 transitions. Word has length 30 [2022-03-15 17:02:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:49,260 INFO L470 AbstractCegarLoop]: Abstraction has 17959 states and 68988 transitions. [2022-03-15 17:02:49,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:49,260 INFO L276 IsEmpty]: Start isEmpty. Operand 17959 states and 68988 transitions. [2022-03-15 17:02:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:49,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:49,292 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:49,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-15 17:02:49,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-15 17:02:49,493 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:02:49,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:49,493 INFO L85 PathProgramCache]: Analyzing trace with hash 109228903, now seen corresponding path program 76 times [2022-03-15 17:02:49,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:49,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467418253] [2022-03-15 17:02:49,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:49,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:49,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:49,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467418253] [2022-03-15 17:02:49,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467418253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:49,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535024254] [2022-03-15 17:02:49,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:02:49,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:49,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:49,542 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:49,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-15 17:02:49,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:02:49,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:49,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:02:49,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:49,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:49,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535024254] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:49,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:49,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-03-15 17:02:49,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376055394] [2022-03-15 17:02:49,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:49,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 17:02:49,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:49,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 17:02:49,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-03-15 17:02:49,857 INFO L87 Difference]: Start difference. First operand 17959 states and 68988 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:52,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:52,390 INFO L93 Difference]: Finished difference Result 37595 states and 135163 transitions. [2022-03-15 17:02:52,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-03-15 17:02:52,390 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:52,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:52,506 INFO L225 Difference]: With dead ends: 37595 [2022-03-15 17:02:52,506 INFO L226 Difference]: Without dead ends: 37595 [2022-03-15 17:02:52,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7508 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3980, Invalid=13312, Unknown=0, NotChecked=0, Total=17292 [2022-03-15 17:02:52,509 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 977 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:52,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 479 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:02:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37595 states. [2022-03-15 17:02:53,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37595 to 21412. [2022-03-15 17:02:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21412 states, 21411 states have (on average 3.908224744290318) internal successors, (83679), 21411 states have internal predecessors, (83679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21412 states to 21412 states and 83679 transitions. [2022-03-15 17:02:53,393 INFO L78 Accepts]: Start accepts. Automaton has 21412 states and 83679 transitions. Word has length 30 [2022-03-15 17:02:53,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:53,393 INFO L470 AbstractCegarLoop]: Abstraction has 21412 states and 83679 transitions. [2022-03-15 17:02:53,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:53,393 INFO L276 IsEmpty]: Start isEmpty. Operand 21412 states and 83679 transitions. [2022-03-15 17:02:53,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:53,432 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:53,432 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:53,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-15 17:02:53,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-15 17:02:53,633 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:02:53,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:53,633 INFO L85 PathProgramCache]: Analyzing trace with hash -946148491, now seen corresponding path program 77 times [2022-03-15 17:02:53,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:53,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030602191] [2022-03-15 17:02:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:53,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:53,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:53,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030602191] [2022-03-15 17:02:53,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030602191] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:53,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543388112] [2022-03-15 17:02:53,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:02:53,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:53,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:53,682 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:53,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-15 17:02:53,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 17:02:53,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:53,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:02:53,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:53,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:53,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543388112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:53,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:53,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-03-15 17:02:53,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126262912] [2022-03-15 17:02:53,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:53,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 17:02:53,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:53,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 17:02:53,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-03-15 17:02:53,986 INFO L87 Difference]: Start difference. First operand 21412 states and 83679 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:56,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:56,955 INFO L93 Difference]: Finished difference Result 39919 states and 144205 transitions. [2022-03-15 17:02:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-03-15 17:02:56,955 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:02:56,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:57,094 INFO L225 Difference]: With dead ends: 39919 [2022-03-15 17:02:57,094 INFO L226 Difference]: Without dead ends: 39899 [2022-03-15 17:02:57,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11986 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5282, Invalid=22108, Unknown=0, NotChecked=0, Total=27390 [2022-03-15 17:02:57,097 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1105 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:57,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1105 Valid, 396 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:02:57,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39899 states. [2022-03-15 17:02:58,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39899 to 21371. [2022-03-15 17:02:58,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21371 states, 21370 states have (on average 3.907440336920917) internal successors, (83502), 21370 states have internal predecessors, (83502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21371 states to 21371 states and 83502 transitions. [2022-03-15 17:02:58,181 INFO L78 Accepts]: Start accepts. Automaton has 21371 states and 83502 transitions. Word has length 30 [2022-03-15 17:02:58,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:58,182 INFO L470 AbstractCegarLoop]: Abstraction has 21371 states and 83502 transitions. [2022-03-15 17:02:58,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:58,182 INFO L276 IsEmpty]: Start isEmpty. Operand 21371 states and 83502 transitions. [2022-03-15 17:02:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:02:58,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:58,221 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:58,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-15 17:02:58,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:58,422 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:02:58,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:58,422 INFO L85 PathProgramCache]: Analyzing trace with hash -94905237, now seen corresponding path program 78 times [2022-03-15 17:02:58,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:58,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550860214] [2022-03-15 17:02:58,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:58,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:58,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:58,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550860214] [2022-03-15 17:02:58,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550860214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:58,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486019375] [2022-03-15 17:02:58,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:02:58,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:58,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:58,472 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:58,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-15 17:02:58,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 17:02:58,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:58,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:02:58,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:58,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:58,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486019375] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:58,774 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:58,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-03-15 17:02:58,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26653678] [2022-03-15 17:02:58,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:58,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 17:02:58,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:58,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 17:02:58,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-03-15 17:02:58,775 INFO L87 Difference]: Start difference. First operand 21371 states and 83502 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:01,858 INFO L93 Difference]: Finished difference Result 41385 states and 149926 transitions. [2022-03-15 17:03:01,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-03-15 17:03:01,858 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:01,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:02,130 INFO L225 Difference]: With dead ends: 41385 [2022-03-15 17:03:02,130 INFO L226 Difference]: Without dead ends: 41385 [2022-03-15 17:03:02,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12490 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6088, Invalid=19352, Unknown=0, NotChecked=0, Total=25440 [2022-03-15 17:03:02,132 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1054 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:02,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1054 Valid, 435 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:03:02,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41385 states. [2022-03-15 17:03:03,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41385 to 21369. [2022-03-15 17:03:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21369 states, 21368 states have (on average 3.9074784724822162) internal successors, (83495), 21368 states have internal predecessors, (83495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:03,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21369 states to 21369 states and 83495 transitions. [2022-03-15 17:03:03,126 INFO L78 Accepts]: Start accepts. Automaton has 21369 states and 83495 transitions. Word has length 30 [2022-03-15 17:03:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:03,127 INFO L470 AbstractCegarLoop]: Abstraction has 21369 states and 83495 transitions. [2022-03-15 17:03:03,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:03,127 INFO L276 IsEmpty]: Start isEmpty. Operand 21369 states and 83495 transitions. [2022-03-15 17:03:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:03,168 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:03,168 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:03,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-15 17:03:03,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:03,369 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:03:03,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:03,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1102478425, now seen corresponding path program 79 times [2022-03-15 17:03:03,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:03,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7354046] [2022-03-15 17:03:03,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:03,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:03,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:03,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7354046] [2022-03-15 17:03:03,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7354046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:03,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523912310] [2022-03-15 17:03:03,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:03:03,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:03,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:03,534 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:03,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-15 17:03:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:03,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:03:03,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:03,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:03,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523912310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:03,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:03,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-03-15 17:03:03,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566125337] [2022-03-15 17:03:03,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:03,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 17:03:03,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:03,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 17:03:03,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-03-15 17:03:03,851 INFO L87 Difference]: Start difference. First operand 21369 states and 83495 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:07,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:07,637 INFO L93 Difference]: Finished difference Result 49381 states and 176111 transitions. [2022-03-15 17:03:07,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-03-15 17:03:07,637 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:07,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:07,817 INFO L225 Difference]: With dead ends: 49381 [2022-03-15 17:03:07,817 INFO L226 Difference]: Without dead ends: 49381 [2022-03-15 17:03:07,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17447 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7299, Invalid=29757, Unknown=0, NotChecked=0, Total=37056 [2022-03-15 17:03:07,818 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 788 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:07,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 536 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:03:07,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49381 states. [2022-03-15 17:03:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49381 to 21351. [2022-03-15 17:03:08,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21351 states, 21350 states have (on average 3.906838407494145) internal successors, (83411), 21350 states have internal predecessors, (83411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:08,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21351 states to 21351 states and 83411 transitions. [2022-03-15 17:03:08,926 INFO L78 Accepts]: Start accepts. Automaton has 21351 states and 83411 transitions. Word has length 30 [2022-03-15 17:03:08,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:08,926 INFO L470 AbstractCegarLoop]: Abstraction has 21351 states and 83411 transitions. [2022-03-15 17:03:08,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:08,926 INFO L276 IsEmpty]: Start isEmpty. Operand 21351 states and 83411 transitions. [2022-03-15 17:03:08,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:08,970 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:08,970 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:08,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-15 17:03:09,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-15 17:03:09,170 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:03:09,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:09,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2072491833, now seen corresponding path program 80 times [2022-03-15 17:03:09,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:09,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459253] [2022-03-15 17:03:09,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:09,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:09,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:09,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459253] [2022-03-15 17:03:09,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:09,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804182556] [2022-03-15 17:03:09,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:03:09,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:09,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:09,224 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:09,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-15 17:03:09,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:03:09,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:09,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:03:09,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:09,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:09,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804182556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:09,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:09,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-03-15 17:03:09,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972172487] [2022-03-15 17:03:09,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:09,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 17:03:09,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:09,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 17:03:09,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2022-03-15 17:03:09,519 INFO L87 Difference]: Start difference. First operand 21351 states and 83411 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:11,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:11,789 INFO L93 Difference]: Finished difference Result 44753 states and 161002 transitions. [2022-03-15 17:03:11,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-03-15 17:03:11,789 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:11,934 INFO L225 Difference]: With dead ends: 44753 [2022-03-15 17:03:11,934 INFO L226 Difference]: Without dead ends: 44741 [2022-03-15 17:03:11,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6552 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3379, Invalid=12371, Unknown=0, NotChecked=0, Total=15750 [2022-03-15 17:03:11,935 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 903 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:11,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 361 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:03:12,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44741 states. [2022-03-15 17:03:12,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44741 to 21357. [2022-03-15 17:03:12,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21357 states, 21356 states have (on average 3.90672410563776) internal successors, (83432), 21356 states have internal predecessors, (83432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21357 states to 21357 states and 83432 transitions. [2022-03-15 17:03:12,904 INFO L78 Accepts]: Start accepts. Automaton has 21357 states and 83432 transitions. Word has length 30 [2022-03-15 17:03:12,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:12,905 INFO L470 AbstractCegarLoop]: Abstraction has 21357 states and 83432 transitions. [2022-03-15 17:03:12,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:12,905 INFO L276 IsEmpty]: Start isEmpty. Operand 21357 states and 83432 transitions. [2022-03-15 17:03:13,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:13,107 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:13,107 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:13,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-15 17:03:13,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-15 17:03:13,307 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:03:13,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:13,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1951965771, now seen corresponding path program 81 times [2022-03-15 17:03:13,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:13,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561419831] [2022-03-15 17:03:13,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:13,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:13,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:13,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561419831] [2022-03-15 17:03:13,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561419831] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:13,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816389824] [2022-03-15 17:03:13,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:03:13,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:13,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:13,372 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:13,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-15 17:03:13,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:03:13,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:13,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 17:03:13,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:13,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 17:03:13,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:03:13,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-03-15 17:03:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:03:13,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:13,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 17:03:13,978 INFO L353 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2022-03-15 17:03:13,978 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 21 treesize of output 22 [2022-03-15 17:03:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:03:14,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816389824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:14,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:14,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 33 [2022-03-15 17:03:14,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008744946] [2022-03-15 17:03:14,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:14,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 17:03:14,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:14,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 17:03:14,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 17:03:14,179 INFO L87 Difference]: Start difference. First operand 21357 states and 83432 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:25,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:25,227 INFO L93 Difference]: Finished difference Result 55083 states and 197153 transitions. [2022-03-15 17:03:25,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 284 states. [2022-03-15 17:03:25,228 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:25,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:25,429 INFO L225 Difference]: With dead ends: 55083 [2022-03-15 17:03:25,429 INFO L226 Difference]: Without dead ends: 55048 [2022-03-15 17:03:25,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 58 SyntacticMatches, 18 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42724 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=14090, Invalid=79240, Unknown=0, NotChecked=0, Total=93330 [2022-03-15 17:03:25,432 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1220 mSDsluCounter, 2203 mSDsCounter, 0 mSdLazyCounter, 3518 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 4132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 3518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:25,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 1358 Invalid, 4132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 3518 Invalid, 0 Unknown, 347 Unchecked, 1.7s Time] [2022-03-15 17:03:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55048 states. [2022-03-15 17:03:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55048 to 23406. [2022-03-15 17:03:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23406 states, 23405 states have (on average 3.9390301217688526) internal successors, (92193), 23405 states have internal predecessors, (92193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23406 states to 23406 states and 92193 transitions. [2022-03-15 17:03:26,534 INFO L78 Accepts]: Start accepts. Automaton has 23406 states and 92193 transitions. Word has length 30 [2022-03-15 17:03:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:26,534 INFO L470 AbstractCegarLoop]: Abstraction has 23406 states and 92193 transitions. [2022-03-15 17:03:26,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 23406 states and 92193 transitions. [2022-03-15 17:03:26,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:26,575 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:26,575 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:26,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-15 17:03:26,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:26,776 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:03:26,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:26,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1366937585, now seen corresponding path program 82 times [2022-03-15 17:03:26,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:26,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498527710] [2022-03-15 17:03:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:26,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:26,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:26,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498527710] [2022-03-15 17:03:26,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498527710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:26,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512291374] [2022-03-15 17:03:26,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:03:26,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:26,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:26,844 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:26,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-15 17:03:26,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:03:26,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:26,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:03:26,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:27,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:27,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512291374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:27,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:27,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-03-15 17:03:27,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122976285] [2022-03-15 17:03:27,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:27,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 17:03:27,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:27,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 17:03:27,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-03-15 17:03:27,139 INFO L87 Difference]: Start difference. First operand 23406 states and 92193 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:28,778 INFO L93 Difference]: Finished difference Result 50079 states and 185865 transitions. [2022-03-15 17:03:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-15 17:03:28,779 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:28,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:28,944 INFO L225 Difference]: With dead ends: 50079 [2022-03-15 17:03:28,945 INFO L226 Difference]: Without dead ends: 50043 [2022-03-15 17:03:28,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3255 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1775, Invalid=6781, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 17:03:28,946 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 582 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:28,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 323 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:03:29,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50043 states. [2022-03-15 17:03:30,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50043 to 24787. [2022-03-15 17:03:30,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24787 states, 24786 states have (on average 3.956507705963044) internal successors, (98066), 24786 states have internal predecessors, (98066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24787 states to 24787 states and 98066 transitions. [2022-03-15 17:03:30,158 INFO L78 Accepts]: Start accepts. Automaton has 24787 states and 98066 transitions. Word has length 30 [2022-03-15 17:03:30,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:30,158 INFO L470 AbstractCegarLoop]: Abstraction has 24787 states and 98066 transitions. [2022-03-15 17:03:30,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:30,158 INFO L276 IsEmpty]: Start isEmpty. Operand 24787 states and 98066 transitions. [2022-03-15 17:03:30,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:30,203 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:30,203 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:30,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-15 17:03:30,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:30,404 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:03:30,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:30,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1436024979, now seen corresponding path program 83 times [2022-03-15 17:03:30,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:30,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921013233] [2022-03-15 17:03:30,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:30,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:30,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:30,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921013233] [2022-03-15 17:03:30,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921013233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:30,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382042024] [2022-03-15 17:03:30,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:03:30,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:30,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:30,449 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:30,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-15 17:03:30,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 17:03:30,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:30,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:03:30,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:30,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:30,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382042024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:30,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:30,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-03-15 17:03:30,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73751581] [2022-03-15 17:03:30,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:30,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 17:03:30,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:30,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 17:03:30,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-03-15 17:03:30,701 INFO L87 Difference]: Start difference. First operand 24787 states and 98066 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:32,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:32,619 INFO L93 Difference]: Finished difference Result 51358 states and 189473 transitions. [2022-03-15 17:03:32,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-15 17:03:32,619 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:32,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:32,825 INFO L225 Difference]: With dead ends: 51358 [2022-03-15 17:03:32,825 INFO L226 Difference]: Without dead ends: 51346 [2022-03-15 17:03:32,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4015 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2125, Invalid=7975, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 17:03:32,826 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 638 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:32,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 328 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:03:32,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51346 states. [2022-03-15 17:03:33,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51346 to 24934. [2022-03-15 17:03:33,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24934 states, 24933 states have (on average 3.953114346448482) internal successors, (98563), 24933 states have internal predecessors, (98563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24934 states to 24934 states and 98563 transitions. [2022-03-15 17:03:34,046 INFO L78 Accepts]: Start accepts. Automaton has 24934 states and 98563 transitions. Word has length 30 [2022-03-15 17:03:34,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:34,046 INFO L470 AbstractCegarLoop]: Abstraction has 24934 states and 98563 transitions. [2022-03-15 17:03:34,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:34,046 INFO L276 IsEmpty]: Start isEmpty. Operand 24934 states and 98563 transitions. [2022-03-15 17:03:34,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:34,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:34,091 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:34,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-15 17:03:34,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-03-15 17:03:34,291 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:03:34,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:34,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1588868973, now seen corresponding path program 84 times [2022-03-15 17:03:34,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:34,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028295679] [2022-03-15 17:03:34,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:34,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:34,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:34,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028295679] [2022-03-15 17:03:34,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028295679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:34,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574938466] [2022-03-15 17:03:34,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:03:34,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:34,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:34,352 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:34,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-15 17:03:34,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 17:03:34,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:34,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:03:34,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:34,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:34,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574938466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:34,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:34,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-03-15 17:03:34,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600992822] [2022-03-15 17:03:34,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:34,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 17:03:34,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:34,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 17:03:34,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-03-15 17:03:34,666 INFO L87 Difference]: Start difference. First operand 24934 states and 98563 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:36,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:36,710 INFO L93 Difference]: Finished difference Result 52042 states and 191452 transitions. [2022-03-15 17:03:36,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-15 17:03:36,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:36,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:37,057 INFO L225 Difference]: With dead ends: 52042 [2022-03-15 17:03:37,057 INFO L226 Difference]: Without dead ends: 52042 [2022-03-15 17:03:37,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5759 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2804, Invalid=10536, Unknown=0, NotChecked=0, Total=13340 [2022-03-15 17:03:37,058 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 696 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:37,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 373 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:03:37,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52042 states. [2022-03-15 17:03:38,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52042 to 24804. [2022-03-15 17:03:38,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24804 states, 24803 states have (on average 3.9582308591702615) internal successors, (98176), 24803 states have internal predecessors, (98176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24804 states to 24804 states and 98176 transitions. [2022-03-15 17:03:38,217 INFO L78 Accepts]: Start accepts. Automaton has 24804 states and 98176 transitions. Word has length 30 [2022-03-15 17:03:38,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:38,218 INFO L470 AbstractCegarLoop]: Abstraction has 24804 states and 98176 transitions. [2022-03-15 17:03:38,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:38,218 INFO L276 IsEmpty]: Start isEmpty. Operand 24804 states and 98176 transitions. [2022-03-15 17:03:38,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:38,262 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:38,262 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:38,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-15 17:03:38,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-15 17:03:38,463 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:03:38,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:38,463 INFO L85 PathProgramCache]: Analyzing trace with hash -319949037, now seen corresponding path program 85 times [2022-03-15 17:03:38,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:38,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559191291] [2022-03-15 17:03:38,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:38,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:38,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:38,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559191291] [2022-03-15 17:03:38,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559191291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:38,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035444651] [2022-03-15 17:03:38,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:03:38,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:38,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:38,510 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:38,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-15 17:03:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:38,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:03:38,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:38,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:38,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035444651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:38,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:38,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-15 17:03:38,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83804376] [2022-03-15 17:03:38,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:38,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 17:03:38,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:38,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 17:03:38,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-03-15 17:03:38,749 INFO L87 Difference]: Start difference. First operand 24804 states and 98176 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:40,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:40,114 INFO L93 Difference]: Finished difference Result 43209 states and 161885 transitions. [2022-03-15 17:03:40,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-15 17:03:40,114 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:40,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:40,251 INFO L225 Difference]: With dead ends: 43209 [2022-03-15 17:03:40,251 INFO L226 Difference]: Without dead ends: 43173 [2022-03-15 17:03:40,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2108 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1236, Invalid=4770, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 17:03:40,252 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 626 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:40,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 264 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 17:03:40,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43173 states. [2022-03-15 17:03:41,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43173 to 24838. [2022-03-15 17:03:41,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24838 states, 24837 states have (on average 3.957523050287877) internal successors, (98293), 24837 states have internal predecessors, (98293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24838 states to 24838 states and 98293 transitions. [2022-03-15 17:03:41,373 INFO L78 Accepts]: Start accepts. Automaton has 24838 states and 98293 transitions. Word has length 30 [2022-03-15 17:03:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:41,373 INFO L470 AbstractCegarLoop]: Abstraction has 24838 states and 98293 transitions. [2022-03-15 17:03:41,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 24838 states and 98293 transitions. [2022-03-15 17:03:41,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:41,415 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:41,415 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:41,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-15 17:03:41,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-15 17:03:41,615 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:03:41,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:41,616 INFO L85 PathProgramCache]: Analyzing trace with hash 382580375, now seen corresponding path program 86 times [2022-03-15 17:03:41,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:41,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214023516] [2022-03-15 17:03:41,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:41,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:41,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:41,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:41,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214023516] [2022-03-15 17:03:41,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214023516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:41,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117503495] [2022-03-15 17:03:41,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:03:41,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:41,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:41,662 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:41,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-15 17:03:41,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:03:41,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:41,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:03:41,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:41,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:41,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117503495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:41,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:41,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-15 17:03:41,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676755234] [2022-03-15 17:03:41,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:41,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 17:03:41,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:41,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 17:03:41,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-03-15 17:03:41,901 INFO L87 Difference]: Start difference. First operand 24838 states and 98293 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:43,058 INFO L93 Difference]: Finished difference Result 42696 states and 160691 transitions. [2022-03-15 17:03:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 17:03:43,058 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:43,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:43,199 INFO L225 Difference]: With dead ends: 42696 [2022-03-15 17:03:43,199 INFO L226 Difference]: Without dead ends: 42672 [2022-03-15 17:03:43,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1031, Invalid=3661, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 17:03:43,199 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 490 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:43,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 248 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 17:03:43,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42672 states. [2022-03-15 17:03:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42672 to 25046. [2022-03-15 17:03:44,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25046 states, 25045 states have (on average 3.9503693351966462) internal successors, (98937), 25045 states have internal predecessors, (98937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25046 states to 25046 states and 98937 transitions. [2022-03-15 17:03:44,219 INFO L78 Accepts]: Start accepts. Automaton has 25046 states and 98937 transitions. Word has length 30 [2022-03-15 17:03:44,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:44,219 INFO L470 AbstractCegarLoop]: Abstraction has 25046 states and 98937 transitions. [2022-03-15 17:03:44,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:44,219 INFO L276 IsEmpty]: Start isEmpty. Operand 25046 states and 98937 transitions. [2022-03-15 17:03:44,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:44,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:44,264 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:44,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-15 17:03:44,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-15 17:03:44,464 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:03:44,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:44,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1152351895, now seen corresponding path program 87 times [2022-03-15 17:03:44,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:44,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624524611] [2022-03-15 17:03:44,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:44,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:44,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:44,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624524611] [2022-03-15 17:03:44,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624524611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:44,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814692281] [2022-03-15 17:03:44,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:03:44,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:44,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:44,511 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:44,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-15 17:03:44,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 17:03:44,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:44,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:03:44,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:44,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:44,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814692281] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:44,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:44,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-15 17:03:44,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632504304] [2022-03-15 17:03:44,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:44,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 17:03:44,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 17:03:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-03-15 17:03:44,759 INFO L87 Difference]: Start difference. First operand 25046 states and 98937 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:45,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:45,974 INFO L93 Difference]: Finished difference Result 43054 states and 161902 transitions. [2022-03-15 17:03:45,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 17:03:45,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:45,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:46,267 INFO L225 Difference]: With dead ends: 43054 [2022-03-15 17:03:46,267 INFO L226 Difference]: Without dead ends: 43046 [2022-03-15 17:03:46,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1074, Invalid=3756, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 17:03:46,267 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 482 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:46,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 272 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 17:03:46,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43046 states. [2022-03-15 17:03:47,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43046 to 27549. [2022-03-15 17:03:47,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27549 states, 27548 states have (on average 3.954152751560912) internal successors, (108929), 27548 states have internal predecessors, (108929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:47,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27549 states to 27549 states and 108929 transitions. [2022-03-15 17:03:47,259 INFO L78 Accepts]: Start accepts. Automaton has 27549 states and 108929 transitions. Word has length 30 [2022-03-15 17:03:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:47,259 INFO L470 AbstractCegarLoop]: Abstraction has 27549 states and 108929 transitions. [2022-03-15 17:03:47,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 27549 states and 108929 transitions. [2022-03-15 17:03:47,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:47,322 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:47,322 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:47,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-15 17:03:47,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:47,524 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:03:47,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:47,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1422861587, now seen corresponding path program 88 times [2022-03-15 17:03:47,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:47,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045682869] [2022-03-15 17:03:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:47,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:47,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:47,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045682869] [2022-03-15 17:03:47,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045682869] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:47,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757878174] [2022-03-15 17:03:47,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:03:47,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:47,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:47,583 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:47,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-15 17:03:47,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:03:47,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:47,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:03:47,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:47,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:47,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757878174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:47,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:47,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-15 17:03:47,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031658819] [2022-03-15 17:03:47,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:47,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 17:03:47,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:47,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 17:03:47,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-03-15 17:03:47,834 INFO L87 Difference]: Start difference. First operand 27549 states and 108929 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:49,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:49,241 INFO L93 Difference]: Finished difference Result 43663 states and 163665 transitions. [2022-03-15 17:03:49,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-15 17:03:49,242 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:49,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:49,384 INFO L225 Difference]: With dead ends: 43663 [2022-03-15 17:03:49,384 INFO L226 Difference]: Without dead ends: 43663 [2022-03-15 17:03:49,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2568 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1452, Invalid=5190, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 17:03:49,385 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 600 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:49,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 312 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 17:03:49,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43663 states. [2022-03-15 17:03:50,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43663 to 27467. [2022-03-15 17:03:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27467 states, 27466 states have (on average 3.9571106094808126) internal successors, (108686), 27466 states have internal predecessors, (108686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:50,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27467 states to 27467 states and 108686 transitions. [2022-03-15 17:03:50,559 INFO L78 Accepts]: Start accepts. Automaton has 27467 states and 108686 transitions. Word has length 30 [2022-03-15 17:03:50,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:50,559 INFO L470 AbstractCegarLoop]: Abstraction has 27467 states and 108686 transitions. [2022-03-15 17:03:50,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:50,559 INFO L276 IsEmpty]: Start isEmpty. Operand 27467 states and 108686 transitions. [2022-03-15 17:03:50,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:50,616 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:50,616 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:50,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-15 17:03:50,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:50,816 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:03:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:50,816 INFO L85 PathProgramCache]: Analyzing trace with hash 18202575, now seen corresponding path program 27 times [2022-03-15 17:03:50,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:50,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477910673] [2022-03-15 17:03:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:50,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:50,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:50,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477910673] [2022-03-15 17:03:50,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477910673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:50,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364678965] [2022-03-15 17:03:50,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:03:50,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:50,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:50,872 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:50,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-15 17:03:50,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:03:50,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:50,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 17:03:50,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:51,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:03:51,148 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 17:03:51,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 17:03:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 17:03:51,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:51,342 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 17:03:51,343 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 17 treesize of output 26 [2022-03-15 17:03:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 17:03:51,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364678965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:51,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:51,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-15 17:03:51,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105526020] [2022-03-15 17:03:51,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:51,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 17:03:51,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:51,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 17:03:51,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-15 17:03:51,615 INFO L87 Difference]: Start difference. First operand 27467 states and 108686 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:53,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:53,791 INFO L93 Difference]: Finished difference Result 44321 states and 168181 transitions. [2022-03-15 17:03:53,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-15 17:03:53,791 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:53,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:54,071 INFO L225 Difference]: With dead ends: 44321 [2022-03-15 17:03:54,071 INFO L226 Difference]: Without dead ends: 44315 [2022-03-15 17:03:54,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1140, Invalid=6516, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 17:03:54,072 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 417 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 642 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:54,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 667 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 992 Invalid, 0 Unknown, 642 Unchecked, 0.4s Time] [2022-03-15 17:03:54,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44315 states. [2022-03-15 17:03:54,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44315 to 27675. [2022-03-15 17:03:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27675 states, 27674 states have (on average 3.9484353544843533) internal successors, (109269), 27674 states have internal predecessors, (109269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:54,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27675 states to 27675 states and 109269 transitions. [2022-03-15 17:03:54,935 INFO L78 Accepts]: Start accepts. Automaton has 27675 states and 109269 transitions. Word has length 30 [2022-03-15 17:03:54,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:54,935 INFO L470 AbstractCegarLoop]: Abstraction has 27675 states and 109269 transitions. [2022-03-15 17:03:54,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 27675 states and 109269 transitions. [2022-03-15 17:03:55,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:55,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:55,182 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:55,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-15 17:03:55,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-03-15 17:03:55,382 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:03:55,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:55,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1450322577, now seen corresponding path program 28 times [2022-03-15 17:03:55,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:55,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005705353] [2022-03-15 17:03:55,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:55,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:55,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:55,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005705353] [2022-03-15 17:03:55,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005705353] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:55,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680305117] [2022-03-15 17:03:55,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:03:55,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:55,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:55,442 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:55,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-15 17:03:55,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:03:55,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:55,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:03:55,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:55,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:55,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680305117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:55,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:55,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2022-03-15 17:03:55,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127636641] [2022-03-15 17:03:55,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:55,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 17:03:55,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:55,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 17:03:55,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-03-15 17:03:55,655 INFO L87 Difference]: Start difference. First operand 27675 states and 109269 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:56,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:56,287 INFO L93 Difference]: Finished difference Result 37644 states and 144252 transitions. [2022-03-15 17:03:56,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 17:03:56,287 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:56,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:56,593 INFO L225 Difference]: With dead ends: 37644 [2022-03-15 17:03:56,593 INFO L226 Difference]: Without dead ends: 37644 [2022-03-15 17:03:56,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 17:03:56,593 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 229 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:56,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 237 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 17:03:56,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37644 states. [2022-03-15 17:03:57,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37644 to 27701. [2022-03-15 17:03:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27701 states, 27700 states have (on average 3.947509025270758) internal successors, (109346), 27700 states have internal predecessors, (109346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27701 states to 27701 states and 109346 transitions. [2022-03-15 17:03:57,401 INFO L78 Accepts]: Start accepts. Automaton has 27701 states and 109346 transitions. Word has length 30 [2022-03-15 17:03:57,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:57,401 INFO L470 AbstractCegarLoop]: Abstraction has 27701 states and 109346 transitions. [2022-03-15 17:03:57,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:57,401 INFO L276 IsEmpty]: Start isEmpty. Operand 27701 states and 109346 transitions. [2022-03-15 17:03:57,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:57,458 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:57,459 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:57,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-15 17:03:57,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:57,659 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:03:57,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:57,659 INFO L85 PathProgramCache]: Analyzing trace with hash -879017091, now seen corresponding path program 29 times [2022-03-15 17:03:57,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:57,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261251685] [2022-03-15 17:03:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:57,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:57,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:57,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261251685] [2022-03-15 17:03:57,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261251685] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:57,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320076046] [2022-03-15 17:03:57,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:03:57,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:57,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:57,695 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:57,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-15 17:03:57,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 17:03:57,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:57,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:03:57,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:57,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:58,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320076046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:58,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:58,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-15 17:03:58,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259200243] [2022-03-15 17:03:58,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:58,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 17:03:58,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:58,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 17:03:58,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-15 17:03:58,028 INFO L87 Difference]: Start difference. First operand 27701 states and 109346 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:58,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:58,494 INFO L93 Difference]: Finished difference Result 37210 states and 143165 transitions. [2022-03-15 17:03:58,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 17:03:58,494 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:03:58,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:58,613 INFO L225 Difference]: With dead ends: 37210 [2022-03-15 17:03:58,613 INFO L226 Difference]: Without dead ends: 37206 [2022-03-15 17:03:58,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2022-03-15 17:03:58,614 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 200 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:58,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 129 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 17:03:58,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37206 states. [2022-03-15 17:03:59,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37206 to 27701. [2022-03-15 17:03:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27701 states, 27700 states have (on average 3.947436823104693) internal successors, (109344), 27700 states have internal predecessors, (109344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27701 states to 27701 states and 109344 transitions. [2022-03-15 17:03:59,558 INFO L78 Accepts]: Start accepts. Automaton has 27701 states and 109344 transitions. Word has length 30 [2022-03-15 17:03:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:59,558 INFO L470 AbstractCegarLoop]: Abstraction has 27701 states and 109344 transitions. [2022-03-15 17:03:59,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 27701 states and 109344 transitions. [2022-03-15 17:03:59,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:03:59,622 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:59,622 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:59,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-15 17:03:59,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:59,822 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:03:59,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:59,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1727886413, now seen corresponding path program 30 times [2022-03-15 17:03:59,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:59,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745207280] [2022-03-15 17:03:59,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:59,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:59,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:59,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745207280] [2022-03-15 17:03:59,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745207280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:59,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556648696] [2022-03-15 17:03:59,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:03:59,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:59,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:59,864 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:59,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-15 17:03:59,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 17:03:59,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:59,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:03:59,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:59,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:00,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556648696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:00,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:00,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-03-15 17:04:00,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265928009] [2022-03-15 17:04:00,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:00,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 17:04:00,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:00,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 17:04:00,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-15 17:04:00,067 INFO L87 Difference]: Start difference. First operand 27701 states and 109344 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:00,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:00,725 INFO L93 Difference]: Finished difference Result 37382 states and 143633 transitions. [2022-03-15 17:04:00,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 17:04:00,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:00,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:00,841 INFO L225 Difference]: With dead ends: 37382 [2022-03-15 17:04:00,842 INFO L226 Difference]: Without dead ends: 37370 [2022-03-15 17:04:00,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 17:04:00,842 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 215 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:00,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 145 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 17:04:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37370 states. [2022-03-15 17:04:01,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37370 to 27817. [2022-03-15 17:04:01,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27817 states, 27816 states have (on average 3.9433419614610297) internal successors, (109688), 27816 states have internal predecessors, (109688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:01,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27817 states to 27817 states and 109688 transitions. [2022-03-15 17:04:01,780 INFO L78 Accepts]: Start accepts. Automaton has 27817 states and 109688 transitions. Word has length 30 [2022-03-15 17:04:01,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:01,780 INFO L470 AbstractCegarLoop]: Abstraction has 27817 states and 109688 transitions. [2022-03-15 17:04:01,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand 27817 states and 109688 transitions. [2022-03-15 17:04:01,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:01,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:01,833 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:01,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-15 17:04:02,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-03-15 17:04:02,033 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:04:02,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:02,034 INFO L85 PathProgramCache]: Analyzing trace with hash 54707119, now seen corresponding path program 89 times [2022-03-15 17:04:02,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:02,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414606380] [2022-03-15 17:04:02,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:02,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:02,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:02,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414606380] [2022-03-15 17:04:02,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414606380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:02,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215778710] [2022-03-15 17:04:02,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:04:02,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:02,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:02,081 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:02,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-15 17:04:02,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 17:04:02,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:02,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:04:02,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:02,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:04:02,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215778710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:02,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:02,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-03-15 17:04:02,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853424370] [2022-03-15 17:04:02,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:02,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 17:04:02,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:02,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 17:04:02,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-03-15 17:04:02,371 INFO L87 Difference]: Start difference. First operand 27817 states and 109688 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:05,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:05,082 INFO L93 Difference]: Finished difference Result 44676 states and 163176 transitions. [2022-03-15 17:04:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-03-15 17:04:05,082 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:05,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:05,367 INFO L225 Difference]: With dead ends: 44676 [2022-03-15 17:04:05,367 INFO L226 Difference]: Without dead ends: 44676 [2022-03-15 17:04:05,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8340 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4131, Invalid=16461, Unknown=0, NotChecked=0, Total=20592 [2022-03-15 17:04:05,368 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 710 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:05,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 505 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1465 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:04:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44676 states. [2022-03-15 17:04:06,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44676 to 28023. [2022-03-15 17:04:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28023 states, 28022 states have (on average 3.935871815002498) internal successors, (110291), 28022 states have internal predecessors, (110291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:06,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28023 states to 28023 states and 110291 transitions. [2022-03-15 17:04:06,495 INFO L78 Accepts]: Start accepts. Automaton has 28023 states and 110291 transitions. Word has length 30 [2022-03-15 17:04:06,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:06,495 INFO L470 AbstractCegarLoop]: Abstraction has 28023 states and 110291 transitions. [2022-03-15 17:04:06,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:06,495 INFO L276 IsEmpty]: Start isEmpty. Operand 28023 states and 110291 transitions. [2022-03-15 17:04:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 17:04:06,550 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:06,550 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:06,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-15 17:04:06,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:06,751 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:04:06,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:06,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1978483925, now seen corresponding path program 90 times [2022-03-15 17:04:06,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:06,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566465877] [2022-03-15 17:04:06,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:06,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:06,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:06,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566465877] [2022-03-15 17:04:06,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566465877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:06,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868378941] [2022-03-15 17:04:06,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:04:06,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:06,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:06,818 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:06,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-15 17:04:06,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 17:04:06,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:06,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 17:04:06,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:07,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:04:07,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868378941] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:07,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:07,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-03-15 17:04:07,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845525550] [2022-03-15 17:04:07,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:07,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 17:04:07,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:07,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 17:04:07,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-03-15 17:04:07,175 INFO L87 Difference]: Start difference. First operand 28023 states and 110291 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:10,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:10,187 INFO L93 Difference]: Finished difference Result 52292 states and 190560 transitions. [2022-03-15 17:04:10,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-03-15 17:04:10,187 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 17:04:10,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:10,533 INFO L225 Difference]: With dead ends: 52292 [2022-03-15 17:04:10,533 INFO L226 Difference]: Without dead ends: 52292 [2022-03-15 17:04:10,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9910 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4480, Invalid=19390, Unknown=0, NotChecked=0, Total=23870 [2022-03-15 17:04:10,535 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 699 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1608 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:10,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 513 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1608 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 17:04:10,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52292 states. [2022-03-15 17:04:11,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52292 to 27802. [2022-03-15 17:04:11,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27802 states, 27801 states have (on average 3.942987662314305) internal successors, (109619), 27801 states have internal predecessors, (109619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27802 states to 27802 states and 109619 transitions. [2022-03-15 17:04:11,704 INFO L78 Accepts]: Start accepts. Automaton has 27802 states and 109619 transitions. Word has length 30 [2022-03-15 17:04:11,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:11,704 INFO L470 AbstractCegarLoop]: Abstraction has 27802 states and 109619 transitions. [2022-03-15 17:04:11,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:11,704 INFO L276 IsEmpty]: Start isEmpty. Operand 27802 states and 109619 transitions. [2022-03-15 17:04:11,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:04:11,761 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:11,761 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:11,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-15 17:04:11,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:11,961 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:04:11,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:11,962 INFO L85 PathProgramCache]: Analyzing trace with hash 711634513, now seen corresponding path program 91 times [2022-03-15 17:04:11,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:11,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721278918] [2022-03-15 17:04:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:11,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:12,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:12,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721278918] [2022-03-15 17:04:12,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721278918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:12,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197101627] [2022-03-15 17:04:12,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:04:12,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:12,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:12,381 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:12,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-15 17:04:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:12,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 17:04:12,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:12,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:04:12,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 17:04:12,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:04:12,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:04:12,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 17:04:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:12,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:13,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 17:04:13,053 INFO L353 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2022-03-15 17:04:13,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 22 [2022-03-15 17:04:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:13,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197101627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:13,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:13,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 17:04:13,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460235267] [2022-03-15 17:04:13,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:13,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 17:04:13,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:13,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 17:04:13,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1081, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 17:04:13,455 INFO L87 Difference]: Start difference. First operand 27802 states and 109619 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 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) [2022-03-15 17:04:18,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:18,242 INFO L93 Difference]: Finished difference Result 36879 states and 140874 transitions. [2022-03-15 17:04:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-15 17:04:18,242 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 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 32 [2022-03-15 17:04:18,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:18,351 INFO L225 Difference]: With dead ends: 36879 [2022-03-15 17:04:18,351 INFO L226 Difference]: Without dead ends: 36616 [2022-03-15 17:04:18,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3055 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1832, Invalid=6910, Unknown=0, NotChecked=0, Total=8742 [2022-03-15 17:04:18,351 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 841 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:18,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 384 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1382 Invalid, 0 Unknown, 215 Unchecked, 0.8s Time] [2022-03-15 17:04:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36616 states. [2022-03-15 17:04:19,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36616 to 27982. [2022-03-15 17:04:19,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27982 states, 27981 states have (on average 3.940352381973482) internal successors, (110255), 27981 states have internal predecessors, (110255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27982 states to 27982 states and 110255 transitions. [2022-03-15 17:04:19,236 INFO L78 Accepts]: Start accepts. Automaton has 27982 states and 110255 transitions. Word has length 32 [2022-03-15 17:04:19,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:19,236 INFO L470 AbstractCegarLoop]: Abstraction has 27982 states and 110255 transitions. [2022-03-15 17:04:19,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 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) [2022-03-15 17:04:19,236 INFO L276 IsEmpty]: Start isEmpty. Operand 27982 states and 110255 transitions. [2022-03-15 17:04:19,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:04:19,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:19,299 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:19,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-15 17:04:19,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-15 17:04:19,499 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:04:19,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:19,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1875228809, now seen corresponding path program 92 times [2022-03-15 17:04:19,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:19,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792584287] [2022-03-15 17:04:19,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:19,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:19,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:19,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792584287] [2022-03-15 17:04:19,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792584287] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:19,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526233231] [2022-03-15 17:04:19,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:04:19,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:19,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:19,941 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:19,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-15 17:04:20,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:04:20,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:20,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 17:04:20,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:20,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 17:04:20,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:04:20,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-03-15 17:04:20,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:04:20,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:04:20,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 17:04:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:20,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:20,651 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 17:04:20,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-15 17:04:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:21,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526233231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:21,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:21,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 17:04:21,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434482623] [2022-03-15 17:04:21,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:21,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 17:04:21,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:21,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 17:04:21,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 17:04:21,195 INFO L87 Difference]: Start difference. First operand 27982 states and 110255 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 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) [2022-03-15 17:04:27,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:27,567 INFO L93 Difference]: Finished difference Result 39522 states and 149006 transitions. [2022-03-15 17:04:27,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-15 17:04:27,568 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 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 32 [2022-03-15 17:04:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:27,698 INFO L225 Difference]: With dead ends: 39522 [2022-03-15 17:04:27,698 INFO L226 Difference]: Without dead ends: 39176 [2022-03-15 17:04:27,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3625 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2163, Invalid=8139, Unknown=0, NotChecked=0, Total=10302 [2022-03-15 17:04:27,699 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 981 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:27,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [981 Valid, 420 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 1274 Invalid, 0 Unknown, 280 Unchecked, 0.8s Time] [2022-03-15 17:04:27,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39176 states. [2022-03-15 17:04:28,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39176 to 28043. [2022-03-15 17:04:28,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28043 states, 28042 states have (on average 3.940196847585764) internal successors, (110491), 28042 states have internal predecessors, (110491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:28,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28043 states to 28043 states and 110491 transitions. [2022-03-15 17:04:28,514 INFO L78 Accepts]: Start accepts. Automaton has 28043 states and 110491 transitions. Word has length 32 [2022-03-15 17:04:28,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:28,515 INFO L470 AbstractCegarLoop]: Abstraction has 28043 states and 110491 transitions. [2022-03-15 17:04:28,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 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) [2022-03-15 17:04:28,515 INFO L276 IsEmpty]: Start isEmpty. Operand 28043 states and 110491 transitions. [2022-03-15 17:04:28,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:04:28,750 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:28,750 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:28,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-15 17:04:28,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:28,951 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:04:28,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:28,951 INFO L85 PathProgramCache]: Analyzing trace with hash 359458385, now seen corresponding path program 93 times [2022-03-15 17:04:28,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:28,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611168571] [2022-03-15 17:04:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:28,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:29,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:29,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611168571] [2022-03-15 17:04:29,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611168571] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:29,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583282391] [2022-03-15 17:04:29,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:04:29,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:29,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:29,449 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:29,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-15 17:04:29,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 17:04:29,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:29,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 17:04:29,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:29,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 17:04:29,791 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-03-15 17:04:29,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-15 17:04:29,892 INFO L353 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-03-15 17:04:29,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 17:04:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 17:04:30,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:30,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 17:04:30,147 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-03-15 17:04:30,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-03-15 17:04:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 17:04:30,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583282391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:30,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:30,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 11] total 33 [2022-03-15 17:04:30,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083196434] [2022-03-15 17:04:30,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:30,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 17:04:30,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:30,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 17:04:30,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 17:04:30,404 INFO L87 Difference]: Start difference. First operand 28043 states and 110491 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 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) [2022-03-15 17:04:45,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:45,499 INFO L93 Difference]: Finished difference Result 62877 states and 234181 transitions. [2022-03-15 17:04:45,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-03-15 17:04:45,500 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 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 32 [2022-03-15 17:04:45,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:45,869 INFO L225 Difference]: With dead ends: 62877 [2022-03-15 17:04:45,869 INFO L226 Difference]: Without dead ends: 62312 [2022-03-15 17:04:45,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20796 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=5172, Invalid=44780, Unknown=0, NotChecked=0, Total=49952 [2022-03-15 17:04:45,871 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 1607 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1607 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 3744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1452 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:45,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1607 Valid, 881 Invalid, 3744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 1886 Invalid, 0 Unknown, 1452 Unchecked, 1.3s Time] [2022-03-15 17:04:45,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62312 states. [2022-03-15 17:04:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62312 to 29543. [2022-03-15 17:04:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29543 states, 29542 states have (on average 3.9225509444181164) internal successors, (115880), 29542 states have internal predecessors, (115880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:47,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29543 states to 29543 states and 115880 transitions. [2022-03-15 17:04:47,159 INFO L78 Accepts]: Start accepts. Automaton has 29543 states and 115880 transitions. Word has length 32 [2022-03-15 17:04:47,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:47,159 INFO L470 AbstractCegarLoop]: Abstraction has 29543 states and 115880 transitions. [2022-03-15 17:04:47,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 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) [2022-03-15 17:04:47,159 INFO L276 IsEmpty]: Start isEmpty. Operand 29543 states and 115880 transitions. [2022-03-15 17:04:47,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:04:47,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:47,219 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:47,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-03-15 17:04:47,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-15 17:04:47,419 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:04:47,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:47,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1371311347, now seen corresponding path program 94 times [2022-03-15 17:04:47,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:47,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171392963] [2022-03-15 17:04:47,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:47,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:47,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:47,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171392963] [2022-03-15 17:04:47,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171392963] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:47,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174038070] [2022-03-15 17:04:47,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:04:47,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:47,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:47,835 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:47,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-15 17:04:47,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:04:47,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:47,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 17:04:47,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:48,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:04:48,229 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 17:04:48,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 17:04:48,341 INFO L353 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-03-15 17:04:48,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 17:04:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:48,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:48,741 INFO L353 Elim1Store]: treesize reduction 25, result has 54.5 percent of original size [2022-03-15 17:04:48,742 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 46 [2022-03-15 17:04:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:49,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174038070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:49,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:49,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-15 17:04:49,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479245094] [2022-03-15 17:04:49,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:49,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 17:04:49,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:49,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 17:04:49,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1215, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 17:04:49,190 INFO L87 Difference]: Start difference. First operand 29543 states and 115880 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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) [2022-03-15 17:04:55,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:55,279 INFO L93 Difference]: Finished difference Result 38388 states and 146336 transitions. [2022-03-15 17:04:55,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-15 17:04:55,279 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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 32 [2022-03-15 17:04:55,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:55,400 INFO L225 Difference]: With dead ends: 38388 [2022-03-15 17:04:55,400 INFO L226 Difference]: Without dead ends: 38273 [2022-03-15 17:04:55,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4424 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2049, Invalid=11993, Unknown=0, NotChecked=0, Total=14042 [2022-03-15 17:04:55,401 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 653 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:55,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 595 Invalid, 2305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1575 Invalid, 0 Unknown, 584 Unchecked, 0.8s Time] [2022-03-15 17:04:55,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38273 states. [2022-03-15 17:04:56,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38273 to 29659. [2022-03-15 17:04:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29659 states, 29658 states have (on average 3.919751837615483) internal successors, (116252), 29658 states have internal predecessors, (116252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29659 states to 29659 states and 116252 transitions. [2022-03-15 17:04:56,239 INFO L78 Accepts]: Start accepts. Automaton has 29659 states and 116252 transitions. Word has length 32 [2022-03-15 17:04:56,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:56,239 INFO L470 AbstractCegarLoop]: Abstraction has 29659 states and 116252 transitions. [2022-03-15 17:04:56,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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) [2022-03-15 17:04:56,239 INFO L276 IsEmpty]: Start isEmpty. Operand 29659 states and 116252 transitions. [2022-03-15 17:04:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:04:56,457 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:56,457 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:56,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-15 17:04:56,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-15 17:04:56,671 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:04:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:56,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1785520251, now seen corresponding path program 31 times [2022-03-15 17:04:56,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:56,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254978246] [2022-03-15 17:04:56,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:56,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:57,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:57,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254978246] [2022-03-15 17:04:57,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254978246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:57,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739939550] [2022-03-15 17:04:57,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:04:57,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:57,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:57,136 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:57,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-15 17:04:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:57,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 17:04:57,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:57,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 17:04:57,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:04:57,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:04:57,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:04:57,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:04:57,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:04:57,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2022-03-15 17:04:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:57,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:57,765 INFO L353 Elim1Store]: treesize reduction 47, result has 23.0 percent of original size [2022-03-15 17:04:57,765 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 32 [2022-03-15 17:04:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:58,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739939550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:58,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:58,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2022-03-15 17:04:58,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023413994] [2022-03-15 17:04:58,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:58,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 17:04:58,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:58,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 17:04:58,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 17:04:58,148 INFO L87 Difference]: Start difference. First operand 29659 states and 116252 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:03,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:03,390 INFO L93 Difference]: Finished difference Result 49841 states and 188499 transitions. [2022-03-15 17:05:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-15 17:05:03,391 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have 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 [2022-03-15 17:05:03,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:03,573 INFO L225 Difference]: With dead ends: 49841 [2022-03-15 17:05:03,573 INFO L226 Difference]: Without dead ends: 49694 [2022-03-15 17:05:03,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1850, Invalid=11490, Unknown=0, NotChecked=0, Total=13340 [2022-03-15 17:05:03,574 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 565 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1946 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:03,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 458 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1946 Invalid, 0 Unknown, 87 Unchecked, 1.0s Time] [2022-03-15 17:05:03,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49694 states. [2022-03-15 17:05:04,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49694 to 29815. [2022-03-15 17:05:04,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29815 states, 29814 states have (on average 3.91373180385054) internal successors, (116684), 29814 states have internal predecessors, (116684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29815 states to 29815 states and 116684 transitions. [2022-03-15 17:05:04,654 INFO L78 Accepts]: Start accepts. Automaton has 29815 states and 116684 transitions. Word has length 32 [2022-03-15 17:05:04,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:04,655 INFO L470 AbstractCegarLoop]: Abstraction has 29815 states and 116684 transitions. [2022-03-15 17:05:04,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:04,655 INFO L276 IsEmpty]: Start isEmpty. Operand 29815 states and 116684 transitions. [2022-03-15 17:05:04,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:05:04,721 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:04,721 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:04,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-15 17:05:04,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-03-15 17:05:04,923 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:05:04,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash 821200773, now seen corresponding path program 32 times [2022-03-15 17:05:04,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:04,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396930514] [2022-03-15 17:05:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:04,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:05,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:05,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396930514] [2022-03-15 17:05:05,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396930514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:05,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004162582] [2022-03-15 17:05:05,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:05:05,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:05,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:05,370 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:05,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-15 17:05:05,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:05:05,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:05,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 17:05:05,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:05,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:05:05,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:05:05,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-03-15 17:05:06,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:05:06,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:05:06,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:05:06,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2022-03-15 17:05:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:06,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:06,200 INFO L353 Elim1Store]: treesize reduction 47, result has 23.0 percent of original size [2022-03-15 17:05:06,200 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 32 [2022-03-15 17:05:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:06,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004162582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:06,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:06,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-03-15 17:05:06,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311204735] [2022-03-15 17:05:06,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:06,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 17:05:06,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:06,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 17:05:06,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 17:05:06,546 INFO L87 Difference]: Start difference. First operand 29815 states and 116684 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:15,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:15,559 INFO L93 Difference]: Finished difference Result 50727 states and 190959 transitions. [2022-03-15 17:05:15,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-15 17:05:15,560 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have 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 [2022-03-15 17:05:15,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:15,746 INFO L225 Difference]: With dead ends: 50727 [2022-03-15 17:05:15,746 INFO L226 Difference]: Without dead ends: 50618 [2022-03-15 17:05:15,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8748 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=3166, Invalid=21956, Unknown=0, NotChecked=0, Total=25122 [2022-03-15 17:05:15,748 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 642 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 3253 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 3518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 3253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:15,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 751 Invalid, 3518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 3253 Invalid, 0 Unknown, 92 Unchecked, 1.6s Time] [2022-03-15 17:05:15,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50618 states. [2022-03-15 17:05:16,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50618 to 29913. [2022-03-15 17:05:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29913 states, 29912 states have (on average 3.9116073816528485) internal successors, (117004), 29912 states have internal predecessors, (117004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29913 states to 29913 states and 117004 transitions. [2022-03-15 17:05:16,909 INFO L78 Accepts]: Start accepts. Automaton has 29913 states and 117004 transitions. Word has length 32 [2022-03-15 17:05:16,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:16,909 INFO L470 AbstractCegarLoop]: Abstraction has 29913 states and 117004 transitions. [2022-03-15 17:05:16,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:16,909 INFO L276 IsEmpty]: Start isEmpty. Operand 29913 states and 117004 transitions. [2022-03-15 17:05:16,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:05:16,989 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:16,989 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:17,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-15 17:05:17,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:17,192 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:05:17,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:17,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1118337783, now seen corresponding path program 33 times [2022-03-15 17:05:17,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:17,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397405311] [2022-03-15 17:05:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:17,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:17,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:17,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397405311] [2022-03-15 17:05:17,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397405311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:17,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272353712] [2022-03-15 17:05:17,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:05:17,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:17,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:17,678 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:17,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-15 17:05:17,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 17:05:17,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:17,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 17:05:17,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:17,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:05:18,020 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 17:05:18,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 17:05:18,198 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-03-15 17:05:18,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 17:05:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 17:05:18,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:18,566 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 17:05:18,566 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 17 treesize of output 26 [2022-03-15 17:05:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 17:05:18,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272353712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:18,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:18,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-03-15 17:05:18,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288421401] [2022-03-15 17:05:18,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:18,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 17:05:18,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:18,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 17:05:18,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-03-15 17:05:18,884 INFO L87 Difference]: Start difference. First operand 29913 states and 117004 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:22,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:22,796 INFO L93 Difference]: Finished difference Result 70378 states and 273867 transitions. [2022-03-15 17:05:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-15 17:05:22,797 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 17:05:22,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:23,100 INFO L225 Difference]: With dead ends: 70378 [2022-03-15 17:05:23,100 INFO L226 Difference]: Without dead ends: 70242 [2022-03-15 17:05:23,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 68 SyntacticMatches, 8 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3095 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1639, Invalid=7481, Unknown=0, NotChecked=0, Total=9120 [2022-03-15 17:05:23,101 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 485 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 2633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1431 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:23,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 402 Invalid, 2633 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [93 Valid, 1109 Invalid, 0 Unknown, 1431 Unchecked, 0.6s Time] [2022-03-15 17:05:23,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70242 states. [2022-03-15 17:05:24,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70242 to 30700. [2022-03-15 17:05:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30700 states, 30699 states have (on average 3.8947848464119352) internal successors, (119566), 30699 states have internal predecessors, (119566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:24,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30700 states to 30700 states and 119566 transitions. [2022-03-15 17:05:24,691 INFO L78 Accepts]: Start accepts. Automaton has 30700 states and 119566 transitions. Word has length 32 [2022-03-15 17:05:24,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:24,691 INFO L470 AbstractCegarLoop]: Abstraction has 30700 states and 119566 transitions. [2022-03-15 17:05:24,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:24,691 INFO L276 IsEmpty]: Start isEmpty. Operand 30700 states and 119566 transitions. [2022-03-15 17:05:24,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:05:24,757 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:24,758 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:24,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:24,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:24,959 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:05:24,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:24,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2101897271, now seen corresponding path program 95 times [2022-03-15 17:05:24,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:24,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737468955] [2022-03-15 17:05:24,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:24,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:25,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:25,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737468955] [2022-03-15 17:05:25,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737468955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:25,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010458075] [2022-03-15 17:05:25,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:05:25,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:25,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:25,411 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:25,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-15 17:05:25,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 17:05:25,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:25,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 17:05:25,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:25,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 17:05:25,750 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-03-15 17:05:25,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-15 17:05:25,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:05:25,900 INFO L353 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-03-15 17:05:25,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2022-03-15 17:05:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:26,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:26,192 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 17:05:26,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-15 17:05:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:26,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010458075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:26,507 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:26,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 37 [2022-03-15 17:05:26,507 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450367315] [2022-03-15 17:05:26,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:26,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 17:05:26,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:26,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 17:05:26,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 17:05:26,508 INFO L87 Difference]: Start difference. First operand 30700 states and 119566 transitions. Second operand has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 37 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) [2022-03-15 17:05:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:38,963 INFO L93 Difference]: Finished difference Result 49606 states and 183648 transitions. [2022-03-15 17:05:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-03-15 17:05:38,963 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 37 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 32 [2022-03-15 17:05:38,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:39,133 INFO L225 Difference]: With dead ends: 49606 [2022-03-15 17:05:39,133 INFO L226 Difference]: Without dead ends: 49138 [2022-03-15 17:05:39,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13021 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=4134, Invalid=29172, Unknown=0, NotChecked=0, Total=33306 [2022-03-15 17:05:39,135 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 1154 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 3385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1009 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:39,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1154 Valid, 980 Invalid, 3385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 2055 Invalid, 0 Unknown, 1009 Unchecked, 1.4s Time] [2022-03-15 17:05:39,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49138 states. [2022-03-15 17:05:40,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49138 to 31406. [2022-03-15 17:05:40,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31406 states, 31405 states have (on average 3.8996656583346603) internal successors, (122469), 31405 states have internal predecessors, (122469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:40,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31406 states to 31406 states and 122469 transitions. [2022-03-15 17:05:40,277 INFO L78 Accepts]: Start accepts. Automaton has 31406 states and 122469 transitions. Word has length 32 [2022-03-15 17:05:40,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:40,278 INFO L470 AbstractCegarLoop]: Abstraction has 31406 states and 122469 transitions. [2022-03-15 17:05:40,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 37 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) [2022-03-15 17:05:40,278 INFO L276 IsEmpty]: Start isEmpty. Operand 31406 states and 122469 transitions. [2022-03-15 17:05:40,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:05:40,347 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:40,347 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:40,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-03-15 17:05:40,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-15 17:05:40,548 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:05:40,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:40,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1716388341, now seen corresponding path program 96 times [2022-03-15 17:05:40,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:40,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56965121] [2022-03-15 17:05:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:40,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:41,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:41,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56965121] [2022-03-15 17:05:41,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56965121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:41,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398157999] [2022-03-15 17:05:41,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:05:41,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:41,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:41,242 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:41,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-15 17:05:41,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 17:05:41,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:41,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 17:05:41,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:41,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:05:41,537 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 17:05:41,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 17:05:41,645 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-03-15 17:05:41,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 17:05:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 17:05:41,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:41,966 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-03-15 17:05:41,966 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 22 treesize of output 48 [2022-03-15 17:05:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 17:05:42,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398157999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:42,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:42,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 32 [2022-03-15 17:05:42,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804731263] [2022-03-15 17:05:42,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:42,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 17:05:42,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:42,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 17:05:42,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-03-15 17:05:42,336 INFO L87 Difference]: Start difference. First operand 31406 states and 122469 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 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) [2022-03-15 17:05:44,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:44,942 INFO L93 Difference]: Finished difference Result 40271 states and 152289 transitions. [2022-03-15 17:05:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 17:05:44,942 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 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 32 [2022-03-15 17:05:44,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:45,082 INFO L225 Difference]: With dead ends: 40271 [2022-03-15 17:05:45,082 INFO L226 Difference]: Without dead ends: 40181 [2022-03-15 17:05:45,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=864, Invalid=4836, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 17:05:45,083 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 536 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1174 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:45,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 446 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 653 Invalid, 0 Unknown, 1174 Unchecked, 0.4s Time] [2022-03-15 17:05:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40181 states. [2022-03-15 17:05:45,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40181 to 32058. [2022-03-15 17:05:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32058 states, 32057 states have (on average 3.8911626165892006) internal successors, (124739), 32057 states have internal predecessors, (124739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32058 states to 32058 states and 124739 transitions. [2022-03-15 17:05:46,019 INFO L78 Accepts]: Start accepts. Automaton has 32058 states and 124739 transitions. Word has length 32 [2022-03-15 17:05:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:46,020 INFO L470 AbstractCegarLoop]: Abstraction has 32058 states and 124739 transitions. [2022-03-15 17:05:46,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 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) [2022-03-15 17:05:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 32058 states and 124739 transitions. [2022-03-15 17:05:46,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:05:46,101 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:46,101 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:46,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-03-15 17:05:46,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2022-03-15 17:05:46,302 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:05:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:46,302 INFO L85 PathProgramCache]: Analyzing trace with hash -882005515, now seen corresponding path program 97 times [2022-03-15 17:05:46,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:46,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102758084] [2022-03-15 17:05:46,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:46,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:46,722 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:46,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102758084] [2022-03-15 17:05:46,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102758084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:46,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578384639] [2022-03-15 17:05:46,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:05:46,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:46,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:46,724 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:46,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-15 17:05:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:46,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 17:05:46,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:47,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:05:47,285 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-03-15 17:05:47,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-15 17:05:47,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:05:47,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:05:47,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 17:05:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:47,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:47,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 17:05:47,578 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-03-15 17:05:47,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-03-15 17:05:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:48,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578384639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:48,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:48,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-15 17:05:48,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779291022] [2022-03-15 17:05:48,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:48,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 17:05:48,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:48,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 17:05:48,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 17:05:48,010 INFO L87 Difference]: Start difference. First operand 32058 states and 124739 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:52,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:52,182 INFO L93 Difference]: Finished difference Result 42967 states and 160976 transitions. [2022-03-15 17:05:52,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 17:05:52,182 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 17:05:52,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:52,423 INFO L225 Difference]: With dead ends: 42967 [2022-03-15 17:05:52,423 INFO L226 Difference]: Without dead ends: 42893 [2022-03-15 17:05:52,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1567, Invalid=7175, Unknown=0, NotChecked=0, Total=8742 [2022-03-15 17:05:52,424 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 698 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:52,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 470 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1184 Invalid, 0 Unknown, 315 Unchecked, 0.7s Time] [2022-03-15 17:05:52,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42893 states. [2022-03-15 17:05:53,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42893 to 32213. [2022-03-15 17:05:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32213 states, 32212 states have (on average 3.886532969079846) internal successors, (125193), 32212 states have internal predecessors, (125193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:53,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32213 states to 32213 states and 125193 transitions. [2022-03-15 17:05:53,530 INFO L78 Accepts]: Start accepts. Automaton has 32213 states and 125193 transitions. Word has length 32 [2022-03-15 17:05:53,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:53,530 INFO L470 AbstractCegarLoop]: Abstraction has 32213 states and 125193 transitions. [2022-03-15 17:05:53,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 32213 states and 125193 transitions. [2022-03-15 17:05:53,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:05:53,608 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:53,608 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:53,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:53,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:53,809 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:05:53,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:53,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1588284495, now seen corresponding path program 98 times [2022-03-15 17:05:53,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:53,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014296168] [2022-03-15 17:05:53,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:53,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:54,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:54,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014296168] [2022-03-15 17:05:54,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014296168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:54,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919927353] [2022-03-15 17:05:54,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:05:54,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:54,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:54,242 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:54,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-15 17:05:54,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:05:54,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:54,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 17:05:54,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:54,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:05:54,631 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-03-15 17:05:54,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-15 17:05:54,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:05:54,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:05:54,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 17:05:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:54,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:54,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 17:05:54,923 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-03-15 17:05:54,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-03-15 17:05:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:55,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919927353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:55,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:55,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-15 17:05:55,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445254420] [2022-03-15 17:05:55,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:55,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 17:05:55,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:55,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 17:05:55,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 17:05:55,352 INFO L87 Difference]: Start difference. First operand 32213 states and 125193 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:59,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:59,932 INFO L93 Difference]: Finished difference Result 43018 states and 161098 transitions. [2022-03-15 17:05:59,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-15 17:05:59,933 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 17:05:59,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:00,078 INFO L225 Difference]: With dead ends: 43018 [2022-03-15 17:06:00,078 INFO L226 Difference]: Without dead ends: 42912 [2022-03-15 17:06:00,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3121 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1717, Invalid=7403, Unknown=0, NotChecked=0, Total=9120 [2022-03-15 17:06:00,079 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 715 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:00,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 466 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1549 Invalid, 0 Unknown, 182 Unchecked, 0.9s Time] [2022-03-15 17:06:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42912 states. [2022-03-15 17:06:01,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42912 to 32162. [2022-03-15 17:06:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32162 states, 32161 states have (on average 3.887565685146606) internal successors, (125028), 32161 states have internal predecessors, (125028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:01,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32162 states to 32162 states and 125028 transitions. [2022-03-15 17:06:01,257 INFO L78 Accepts]: Start accepts. Automaton has 32162 states and 125028 transitions. Word has length 32 [2022-03-15 17:06:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:01,258 INFO L470 AbstractCegarLoop]: Abstraction has 32162 states and 125028 transitions. [2022-03-15 17:06:01,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:01,258 INFO L276 IsEmpty]: Start isEmpty. Operand 32162 states and 125028 transitions. [2022-03-15 17:06:01,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:06:01,322 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:01,322 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:01,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-15 17:06:01,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:01,522 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:06:01,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:01,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2096591479, now seen corresponding path program 99 times [2022-03-15 17:06:01,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:01,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072165487] [2022-03-15 17:06:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:01,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:02,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:02,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072165487] [2022-03-15 17:06:02,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072165487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:02,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106334017] [2022-03-15 17:06:02,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:06:02,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:02,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:02,111 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:02,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-15 17:06:02,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:06:02,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:02,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 17:06:02,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:02,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:06:02,442 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 17:06:02,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 17:06:02,550 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-03-15 17:06:02,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 17:06:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 17:06:02,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:02,880 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-03-15 17:06:02,881 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 22 treesize of output 48 [2022-03-15 17:06:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 17:06:03,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106334017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:03,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:03,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 36 [2022-03-15 17:06:03,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484844534] [2022-03-15 17:06:03,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:03,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 17:06:03,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:03,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 17:06:03,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 17:06:03,299 INFO L87 Difference]: Start difference. First operand 32162 states and 125028 transitions. Second operand has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:07,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:07,806 INFO L93 Difference]: Finished difference Result 51087 states and 189656 transitions. [2022-03-15 17:06:07,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-15 17:06:07,806 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 17:06:07,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:07,977 INFO L225 Difference]: With dead ends: 51087 [2022-03-15 17:06:07,978 INFO L226 Difference]: Without dead ends: 51041 [2022-03-15 17:06:07,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4348 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1764, Invalid=11576, Unknown=0, NotChecked=0, Total=13340 [2022-03-15 17:06:07,978 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 684 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 2790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1797 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:07,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 571 Invalid, 2790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 873 Invalid, 0 Unknown, 1797 Unchecked, 0.5s Time] [2022-03-15 17:06:08,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51041 states. [2022-03-15 17:06:08,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51041 to 32917. [2022-03-15 17:06:08,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32917 states, 32916 states have (on average 3.8803013731923683) internal successors, (127724), 32916 states have internal predecessors, (127724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:09,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32917 states to 32917 states and 127724 transitions. [2022-03-15 17:06:09,067 INFO L78 Accepts]: Start accepts. Automaton has 32917 states and 127724 transitions. Word has length 32 [2022-03-15 17:06:09,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:09,067 INFO L470 AbstractCegarLoop]: Abstraction has 32917 states and 127724 transitions. [2022-03-15 17:06:09,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:09,067 INFO L276 IsEmpty]: Start isEmpty. Operand 32917 states and 127724 transitions. [2022-03-15 17:06:09,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:06:09,134 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:09,134 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:09,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:09,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-15 17:06:09,335 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:06:09,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:09,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1339985849, now seen corresponding path program 34 times [2022-03-15 17:06:09,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:09,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457270606] [2022-03-15 17:06:09,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:09,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:09,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:09,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457270606] [2022-03-15 17:06:09,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457270606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:09,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26078644] [2022-03-15 17:06:09,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:06:09,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:09,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:09,820 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:09,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-15 17:06:09,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:06:09,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:09,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 17:06:09,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:10,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:06:10,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:06:10,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-03-15 17:06:10,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:06:10,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:06:10,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:06:10,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2022-03-15 17:06:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:10,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:10,707 INFO L353 Elim1Store]: treesize reduction 47, result has 23.0 percent of original size [2022-03-15 17:06:10,707 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 32 [2022-03-15 17:06:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:11,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26078644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:11,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:11,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-03-15 17:06:11,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471115582] [2022-03-15 17:06:11,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:11,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 17:06:11,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:11,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 17:06:11,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 17:06:11,045 INFO L87 Difference]: Start difference. First operand 32917 states and 127724 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:20,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:20,571 INFO L93 Difference]: Finished difference Result 55582 states and 207677 transitions. [2022-03-15 17:06:20,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-03-15 17:06:20,571 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have 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 [2022-03-15 17:06:20,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:20,763 INFO L225 Difference]: With dead ends: 55582 [2022-03-15 17:06:20,763 INFO L226 Difference]: Without dead ends: 55484 [2022-03-15 17:06:20,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10943 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=4217, Invalid=26233, Unknown=0, NotChecked=0, Total=30450 [2022-03-15 17:06:20,764 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 782 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 2899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:20,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 605 Invalid, 2899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 2554 Invalid, 0 Unknown, 118 Unchecked, 1.4s Time] [2022-03-15 17:06:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55484 states. [2022-03-15 17:06:21,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55484 to 32935. [2022-03-15 17:06:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32935 states, 32934 states have (on average 3.8810955243820975) internal successors, (127820), 32934 states have internal predecessors, (127820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:22,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32935 states to 32935 states and 127820 transitions. [2022-03-15 17:06:22,012 INFO L78 Accepts]: Start accepts. Automaton has 32935 states and 127820 transitions. Word has length 32 [2022-03-15 17:06:22,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:22,012 INFO L470 AbstractCegarLoop]: Abstraction has 32935 states and 127820 transitions. [2022-03-15 17:06:22,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:22,012 INFO L276 IsEmpty]: Start isEmpty. Operand 32935 states and 127820 transitions. [2022-03-15 17:06:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:06:22,079 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:22,079 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:22,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:22,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-15 17:06:22,280 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:06:22,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:22,281 INFO L85 PathProgramCache]: Analyzing trace with hash 366106637, now seen corresponding path program 100 times [2022-03-15 17:06:22,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:22,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953910418] [2022-03-15 17:06:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:22,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:22,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:22,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953910418] [2022-03-15 17:06:22,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953910418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:22,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236393834] [2022-03-15 17:06:22,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:06:22,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:22,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:22,696 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:22,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-15 17:06:22,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:06:22,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:22,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 17:06:22,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:23,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 17:06:23,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 17:06:23,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:06:23,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:06:23,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 17:06:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:23,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:23,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 17:06:23,415 INFO L353 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2022-03-15 17:06:23,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 22 [2022-03-15 17:06:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:23,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236393834] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:23,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:23,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 17:06:23,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120527033] [2022-03-15 17:06:23,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:23,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 17:06:23,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:23,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 17:06:23,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 17:06:23,781 INFO L87 Difference]: Start difference. First operand 32935 states and 127820 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 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) [2022-03-15 17:06:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:30,961 INFO L93 Difference]: Finished difference Result 42801 states and 159961 transitions. [2022-03-15 17:06:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-15 17:06:30,962 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 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 32 [2022-03-15 17:06:30,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:31,096 INFO L225 Difference]: With dead ends: 42801 [2022-03-15 17:06:31,097 INFO L226 Difference]: Without dead ends: 42466 [2022-03-15 17:06:31,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=3264, Invalid=12992, Unknown=0, NotChecked=0, Total=16256 [2022-03-15 17:06:31,098 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1308 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:31,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1308 Valid, 427 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 1540 Invalid, 0 Unknown, 168 Unchecked, 1.2s Time] [2022-03-15 17:06:31,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42466 states. [2022-03-15 17:06:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42466 to 33169. [2022-03-15 17:06:31,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33169 states, 33168 states have (on average 3.879492281717318) internal successors, (128675), 33168 states have internal predecessors, (128675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:32,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33169 states to 33169 states and 128675 transitions. [2022-03-15 17:06:32,082 INFO L78 Accepts]: Start accepts. Automaton has 33169 states and 128675 transitions. Word has length 32 [2022-03-15 17:06:32,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:32,082 INFO L470 AbstractCegarLoop]: Abstraction has 33169 states and 128675 transitions. [2022-03-15 17:06:32,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 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) [2022-03-15 17:06:32,082 INFO L276 IsEmpty]: Start isEmpty. Operand 33169 states and 128675 transitions. [2022-03-15 17:06:32,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:06:32,150 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:32,150 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:32,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:32,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-15 17:06:32,350 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:06:32,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:32,351 INFO L85 PathProgramCache]: Analyzing trace with hash -685972535, now seen corresponding path program 101 times [2022-03-15 17:06:32,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:32,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195669166] [2022-03-15 17:06:32,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:32,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:32,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:32,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195669166] [2022-03-15 17:06:32,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195669166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:32,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725217797] [2022-03-15 17:06:32,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:06:32,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:32,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:32,806 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:32,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-15 17:06:32,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 17:06:32,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:32,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 17:06:32,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:33,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 17:06:33,335 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-03-15 17:06:33,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-15 17:06:33,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:06:33,386 INFO L353 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-03-15 17:06:33,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2022-03-15 17:06:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:33,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:33,860 INFO L353 Elim1Store]: treesize reduction 25, result has 54.5 percent of original size [2022-03-15 17:06:33,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 46 [2022-03-15 17:06:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:34,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725217797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:34,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:34,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-03-15 17:06:34,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520867596] [2022-03-15 17:06:34,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:34,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 17:06:34,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:34,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 17:06:34,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 17:06:34,157 INFO L87 Difference]: Start difference. First operand 33169 states and 128675 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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) [2022-03-15 17:06:59,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:59,835 INFO L93 Difference]: Finished difference Result 91641 states and 338994 transitions. [2022-03-15 17:06:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2022-03-15 17:06:59,835 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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 32 [2022-03-15 17:06:59,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:00,164 INFO L225 Difference]: With dead ends: 91641 [2022-03-15 17:07:00,164 INFO L226 Difference]: Without dead ends: 90983 [2022-03-15 17:07:00,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42460 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=9928, Invalid=86482, Unknown=0, NotChecked=0, Total=96410 [2022-03-15 17:07:00,168 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 1668 mSDsluCounter, 2176 mSDsCounter, 0 mSdLazyCounter, 2430 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1668 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 4856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 2430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2080 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:00,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1668 Valid, 1074 Invalid, 4856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 2430 Invalid, 0 Unknown, 2080 Unchecked, 1.7s Time] [2022-03-15 17:07:00,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90983 states. [2022-03-15 17:07:02,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90983 to 34783. [2022-03-15 17:07:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34783 states, 34782 states have (on average 3.8822379391639354) internal successors, (135032), 34782 states have internal predecessors, (135032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34783 states to 34783 states and 135032 transitions. [2022-03-15 17:07:02,235 INFO L78 Accepts]: Start accepts. Automaton has 34783 states and 135032 transitions. Word has length 32 [2022-03-15 17:07:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:02,235 INFO L470 AbstractCegarLoop]: Abstraction has 34783 states and 135032 transitions. [2022-03-15 17:07:02,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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) [2022-03-15 17:07:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 34783 states and 135032 transitions. [2022-03-15 17:07:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:07:02,305 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:02,305 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:02,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-03-15 17:07:02,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-15 17:07:02,506 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:07:02,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:02,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2010400627, now seen corresponding path program 102 times [2022-03-15 17:07:02,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:02,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652003034] [2022-03-15 17:07:02,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:02,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:02,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:02,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652003034] [2022-03-15 17:07:02,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652003034] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:02,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470737083] [2022-03-15 17:07:02,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:07:02,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:02,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:02,901 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:02,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-15 17:07:02,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 17:07:02,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:02,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 17:07:02,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:03,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:07:03,220 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-03-15 17:07:03,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-15 17:07:03,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:07:03,463 INFO L353 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-03-15 17:07:03,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2022-03-15 17:07:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:03,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:03,807 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 17:07:03,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-15 17:07:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:04,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470737083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:04,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:04,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 36 [2022-03-15 17:07:04,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698094710] [2022-03-15 17:07:04,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:04,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 17:07:04,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:04,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 17:07:04,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 17:07:04,059 INFO L87 Difference]: Start difference. First operand 34783 states and 135032 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:17,588 INFO L93 Difference]: Finished difference Result 64848 states and 238958 transitions. [2022-03-15 17:07:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-03-15 17:07:17,588 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 17:07:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:17,819 INFO L225 Difference]: With dead ends: 64848 [2022-03-15 17:07:17,820 INFO L226 Difference]: Without dead ends: 64717 [2022-03-15 17:07:17,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13417 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=3375, Invalid=31035, Unknown=0, NotChecked=0, Total=34410 [2022-03-15 17:07:17,821 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 1024 mSDsluCounter, 2280 mSDsCounter, 0 mSdLazyCounter, 3223 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 4653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 3223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1198 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:17,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1024 Valid, 1363 Invalid, 4653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 3223 Invalid, 0 Unknown, 1198 Unchecked, 1.7s Time] [2022-03-15 17:07:18,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64717 states. [2022-03-15 17:07:19,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64717 to 35391. [2022-03-15 17:07:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35391 states, 35390 states have (on average 3.882961288499576) internal successors, (137418), 35390 states have internal predecessors, (137418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35391 states to 35391 states and 137418 transitions. [2022-03-15 17:07:19,347 INFO L78 Accepts]: Start accepts. Automaton has 35391 states and 137418 transitions. Word has length 32 [2022-03-15 17:07:19,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:19,347 INFO L470 AbstractCegarLoop]: Abstraction has 35391 states and 137418 transitions. [2022-03-15 17:07:19,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:19,347 INFO L276 IsEmpty]: Start isEmpty. Operand 35391 states and 137418 transitions. [2022-03-15 17:07:19,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:07:19,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:19,422 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:19,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-03-15 17:07:19,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:19,623 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:07:19,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:19,623 INFO L85 PathProgramCache]: Analyzing trace with hash 547803717, now seen corresponding path program 103 times [2022-03-15 17:07:19,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:19,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799004217] [2022-03-15 17:07:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:19,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:20,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:20,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799004217] [2022-03-15 17:07:20,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799004217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:20,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878821122] [2022-03-15 17:07:20,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:07:20,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:20,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:20,096 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:20,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-15 17:07:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:20,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 17:07:20,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:20,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 17:07:20,471 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-03-15 17:07:20,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-03-15 17:07:20,772 INFO L353 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-03-15 17:07:20,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 17:07:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:20,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:20,996 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 17:07:20,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-15 17:07:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:21,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878821122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:21,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:21,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 17:07:21,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854462462] [2022-03-15 17:07:21,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:21,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 17:07:21,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:21,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 17:07:21,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 17:07:21,379 INFO L87 Difference]: Start difference. First operand 35391 states and 137418 transitions. Second operand has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:41,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:41,582 INFO L93 Difference]: Finished difference Result 51787 states and 191524 transitions. [2022-03-15 17:07:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-03-15 17:07:41,583 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 17:07:41,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:41,756 INFO L225 Difference]: With dead ends: 51787 [2022-03-15 17:07:41,756 INFO L226 Difference]: Without dead ends: 51476 [2022-03-15 17:07:41,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21081 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=6885, Invalid=44417, Unknown=0, NotChecked=0, Total=51302 [2022-03-15 17:07:41,757 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1314 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 3258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 579 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:41,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1314 Valid, 665 Invalid, 3258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 2315 Invalid, 0 Unknown, 579 Unchecked, 1.5s Time] [2022-03-15 17:07:41,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51476 states. [2022-03-15 17:07:42,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51476 to 35455. [2022-03-15 17:07:42,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35455 states, 35454 states have (on average 3.8850341287301857) internal successors, (137740), 35454 states have internal predecessors, (137740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:43,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35455 states to 35455 states and 137740 transitions. [2022-03-15 17:07:43,067 INFO L78 Accepts]: Start accepts. Automaton has 35455 states and 137740 transitions. Word has length 32 [2022-03-15 17:07:43,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:43,067 INFO L470 AbstractCegarLoop]: Abstraction has 35455 states and 137740 transitions. [2022-03-15 17:07:43,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:43,068 INFO L276 IsEmpty]: Start isEmpty. Operand 35455 states and 137740 transitions. [2022-03-15 17:07:43,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:07:43,177 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:43,177 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:43,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-03-15 17:07:43,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-03-15 17:07:43,391 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:07:43,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:43,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1291597695, now seen corresponding path program 104 times [2022-03-15 17:07:43,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:43,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395437823] [2022-03-15 17:07:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:43,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:43,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:43,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395437823] [2022-03-15 17:07:43,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395437823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:43,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359303914] [2022-03-15 17:07:43,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:07:43,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:43,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:43,786 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:43,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-15 17:07:43,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:07:43,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:43,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 17:07:43,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:44,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:07:44,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:07:44,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 17:07:44,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:07:44,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:07:44,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:07:44,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2022-03-15 17:07:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:44,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:44,771 INFO L353 Elim1Store]: treesize reduction 25, result has 54.5 percent of original size [2022-03-15 17:07:44,771 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 46 [2022-03-15 17:07:45,212 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:45,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359303914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:45,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:45,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 41 [2022-03-15 17:07:45,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44130785] [2022-03-15 17:07:45,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:45,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:07:45,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:45,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:07:45,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:07:45,213 INFO L87 Difference]: Start difference. First operand 35455 states and 137740 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 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) [2022-03-15 17:08:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:25,364 INFO L93 Difference]: Finished difference Result 52844 states and 195507 transitions. [2022-03-15 17:08:25,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 382 states. [2022-03-15 17:08:25,365 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 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 32 [2022-03-15 17:08:25,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:25,550 INFO L225 Difference]: With dead ends: 52844 [2022-03-15 17:08:25,550 INFO L226 Difference]: Without dead ends: 52586 [2022-03-15 17:08:25,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70803 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=14658, Invalid=145742, Unknown=0, NotChecked=0, Total=160400 [2022-03-15 17:08:25,556 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 1925 mSDsluCounter, 2652 mSDsCounter, 0 mSdLazyCounter, 4933 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1925 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 5579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 4933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:25,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1925 Valid, 1291 Invalid, 5579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 4933 Invalid, 0 Unknown, 111 Unchecked, 2.9s Time] [2022-03-15 17:08:25,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52586 states. [2022-03-15 17:08:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52586 to 36099. [2022-03-15 17:08:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36099 states, 36098 states have (on average 3.8800764585295586) internal successors, (140063), 36098 states have internal predecessors, (140063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36099 states to 36099 states and 140063 transitions. [2022-03-15 17:08:26,736 INFO L78 Accepts]: Start accepts. Automaton has 36099 states and 140063 transitions. Word has length 32 [2022-03-15 17:08:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:26,736 INFO L470 AbstractCegarLoop]: Abstraction has 36099 states and 140063 transitions. [2022-03-15 17:08:26,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 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) [2022-03-15 17:08:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 36099 states and 140063 transitions. [2022-03-15 17:08:26,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:08:26,807 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:26,807 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:26,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-03-15 17:08:27,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-03-15 17:08:27,008 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:08:27,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:27,008 INFO L85 PathProgramCache]: Analyzing trace with hash -776819403, now seen corresponding path program 105 times [2022-03-15 17:08:27,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:27,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126999227] [2022-03-15 17:08:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:27,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:27,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:27,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:27,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126999227] [2022-03-15 17:08:27,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126999227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:27,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743441978] [2022-03-15 17:08:27,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:08:27,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:27,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:27,479 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:27,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-15 17:08:27,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 17:08:27,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:27,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 17:08:27,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:27,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:08:27,757 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 17:08:27,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 17:08:27,819 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-03-15 17:08:27,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 17:08:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 17:08:28,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:28,193 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-03-15 17:08:28,447 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 22 treesize of output 48 [2022-03-15 17:08:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 17:08:28,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743441978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:28,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:28,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 32 [2022-03-15 17:08:28,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771589146] [2022-03-15 17:08:28,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:28,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 17:08:28,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:28,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 17:08:28,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2022-03-15 17:08:28,764 INFO L87 Difference]: Start difference. First operand 36099 states and 140063 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 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) [2022-03-15 17:08:38,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:38,866 INFO L93 Difference]: Finished difference Result 102620 states and 385220 transitions. [2022-03-15 17:08:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-03-15 17:08:38,867 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 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 32 [2022-03-15 17:08:38,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:39,277 INFO L225 Difference]: With dead ends: 102620 [2022-03-15 17:08:39,277 INFO L226 Difference]: Without dead ends: 102242 [2022-03-15 17:08:39,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14408 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=5681, Invalid=29101, Unknown=0, NotChecked=0, Total=34782 [2022-03-15 17:08:39,279 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1050 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 3436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1894 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:39,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 763 Invalid, 3436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1322 Invalid, 0 Unknown, 1894 Unchecked, 0.9s Time] [2022-03-15 17:08:39,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102242 states. [2022-03-15 17:08:41,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102242 to 38466. [2022-03-15 17:08:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38466 states, 38465 states have (on average 3.907344339009489) internal successors, (150296), 38465 states have internal predecessors, (150296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:41,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38466 states to 38466 states and 150296 transitions. [2022-03-15 17:08:41,567 INFO L78 Accepts]: Start accepts. Automaton has 38466 states and 150296 transitions. Word has length 32 [2022-03-15 17:08:41,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:41,567 INFO L470 AbstractCegarLoop]: Abstraction has 38466 states and 150296 transitions. [2022-03-15 17:08:41,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 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) [2022-03-15 17:08:41,567 INFO L276 IsEmpty]: Start isEmpty. Operand 38466 states and 150296 transitions. [2022-03-15 17:08:41,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:08:41,644 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:41,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:41,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-03-15 17:08:41,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:41,844 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:08:41,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:41,845 INFO L85 PathProgramCache]: Analyzing trace with hash 304198069, now seen corresponding path program 106 times [2022-03-15 17:08:41,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:41,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832159933] [2022-03-15 17:08:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:41,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:42,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:42,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832159933] [2022-03-15 17:08:42,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832159933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:42,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41544651] [2022-03-15 17:08:42,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:08:42,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:42,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:42,281 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:42,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-15 17:08:42,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:08:42,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:42,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 17:08:42,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:42,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-15 17:08:42,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:08:42,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-03-15 17:08:42,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:08:42,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:08:42,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 17:08:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:43,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:43,169 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-03-15 17:08:43,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-03-15 17:08:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:43,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41544651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:43,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:43,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 17:08:43,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119308869] [2022-03-15 17:08:43,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:43,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 17:08:43,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:43,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 17:08:43,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 17:08:43,535 INFO L87 Difference]: Start difference. First operand 38466 states and 150296 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 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) [2022-03-15 17:08:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:56,901 INFO L93 Difference]: Finished difference Result 56723 states and 209267 transitions. [2022-03-15 17:08:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-03-15 17:08:56,901 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 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 32 [2022-03-15 17:08:56,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:57,089 INFO L225 Difference]: With dead ends: 56723 [2022-03-15 17:08:57,089 INFO L226 Difference]: Without dead ends: 56244 [2022-03-15 17:08:57,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11188 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=5132, Invalid=22590, Unknown=0, NotChecked=0, Total=27722 [2022-03-15 17:08:57,090 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 1240 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 2802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:57,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1240 Valid, 572 Invalid, 2802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 2022 Invalid, 0 Unknown, 417 Unchecked, 1.4s Time] [2022-03-15 17:08:57,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56244 states. [2022-03-15 17:08:58,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56244 to 38432. [2022-03-15 17:08:58,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38432 states, 38431 states have (on average 3.9106190315110196) internal successors, (150289), 38431 states have internal predecessors, (150289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38432 states to 38432 states and 150289 transitions. [2022-03-15 17:08:58,419 INFO L78 Accepts]: Start accepts. Automaton has 38432 states and 150289 transitions. Word has length 32 [2022-03-15 17:08:58,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:58,419 INFO L470 AbstractCegarLoop]: Abstraction has 38432 states and 150289 transitions. [2022-03-15 17:08:58,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 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) [2022-03-15 17:08:58,419 INFO L276 IsEmpty]: Start isEmpty. Operand 38432 states and 150289 transitions. [2022-03-15 17:08:58,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:08:58,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:58,497 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:58,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-03-15 17:08:58,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:58,698 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:08:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:58,698 INFO L85 PathProgramCache]: Analyzing trace with hash -432199035, now seen corresponding path program 107 times [2022-03-15 17:08:58,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:58,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226119612] [2022-03-15 17:08:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:58,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:59,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:59,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226119612] [2022-03-15 17:08:59,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226119612] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:59,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962802633] [2022-03-15 17:08:59,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:08:59,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:59,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:59,024 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:59,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-15 17:08:59,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 17:08:59,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:59,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 17:08:59,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:59,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:08:59,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 17:08:59,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:08:59,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 17:08:59,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 17:08:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:59,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:59,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 17:08:59,787 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-03-15 17:08:59,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-03-15 17:09:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:00,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962802633] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:09:00,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:09:00,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-03-15 17:09:00,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434035951] [2022-03-15 17:09:00,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:09:00,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 17:09:00,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:09:00,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 17:09:00,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 17:09:00,173 INFO L87 Difference]: Start difference. First operand 38432 states and 150289 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 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) [2022-03-15 17:09:10,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:09:10,943 INFO L93 Difference]: Finished difference Result 52386 states and 197704 transitions. [2022-03-15 17:09:10,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-03-15 17:09:10,944 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 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 32 [2022-03-15 17:09:10,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:09:11,124 INFO L225 Difference]: With dead ends: 52386 [2022-03-15 17:09:11,124 INFO L226 Difference]: Without dead ends: 51723 [2022-03-15 17:09:11,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12292 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=5432, Invalid=26074, Unknown=0, NotChecked=0, Total=31506 [2022-03-15 17:09:11,126 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1346 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 3510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:09:11,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1346 Valid, 679 Invalid, 3510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 2912 Invalid, 0 Unknown, 113 Unchecked, 1.8s Time] [2022-03-15 17:09:11,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51723 states. [2022-03-15 17:09:12,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51723 to 38501. [2022-03-15 17:09:12,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38501 states, 38500 states have (on average 3.9126233766233764) internal successors, (150636), 38500 states have internal predecessors, (150636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:12,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38501 states to 38501 states and 150636 transitions. [2022-03-15 17:09:12,508 INFO L78 Accepts]: Start accepts. Automaton has 38501 states and 150636 transitions. Word has length 32 [2022-03-15 17:09:12,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:09:12,509 INFO L470 AbstractCegarLoop]: Abstraction has 38501 states and 150636 transitions. [2022-03-15 17:09:12,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 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) [2022-03-15 17:09:12,509 INFO L276 IsEmpty]: Start isEmpty. Operand 38501 states and 150636 transitions. [2022-03-15 17:09:12,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 17:09:12,587 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:09:12,587 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:09:12,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-03-15 17:09:12,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:12,788 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 17:09:12,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:09:12,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1691205311, now seen corresponding path program 108 times [2022-03-15 17:09:12,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:09:12,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826542433] [2022-03-15 17:09:12,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:09:12,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:09:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:13,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:09:13,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826542433] [2022-03-15 17:09:13,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826542433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:09:13,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133559367] [2022-03-15 17:09:13,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:09:13,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:13,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:09:13,122 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:09:13,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-15 17:09:13,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 17:09:13,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:09:13,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 17:09:13,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:09:13,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-15 17:09:13,375 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-15 17:09:13,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-03-15 17:09:13,440 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-03-15 17:09:13,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-03-15 17:09:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 17:09:13,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:09:13,882 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-03-15 17:09:13,883 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 22 treesize of output 48 [2022-03-15 17:09:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 17:09:14,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133559367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:09:14,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:09:14,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 32 [2022-03-15 17:09:14,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195194467] [2022-03-15 17:09:14,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:09:14,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 17:09:14,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:09:14,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 17:09:14,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-03-15 17:09:14,332 INFO L87 Difference]: Start difference. First operand 38501 states and 150636 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:27,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:09:27,945 INFO L93 Difference]: Finished difference Result 137132 states and 508942 transitions. [2022-03-15 17:09:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2022-03-15 17:09:27,945 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have 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 [2022-03-15 17:09:27,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:09:28,770 INFO L225 Difference]: With dead ends: 137132 [2022-03-15 17:09:28,771 INFO L226 Difference]: Without dead ends: 136805 [2022-03-15 17:09:28,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 79 SyntacticMatches, 39 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27049 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=8097, Invalid=50225, Unknown=0, NotChecked=0, Total=58322 [2022-03-15 17:09:28,773 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 971 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 3696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1541 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 17:09:28,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 953 Invalid, 3696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1920 Invalid, 0 Unknown, 1541 Unchecked, 1.2s Time] [2022-03-15 17:09:28,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136805 states. Received shutdown request... [2022-03-15 17:09:30,007 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-15 17:09:30,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-03-15 17:09:30,025 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 17:09:30,025 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 17:09:30,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-03-15 17:09:30,208 WARN L594 AbstractCegarLoop]: Verification canceled: while executing MinimizeSevpa. [2022-03-15 17:09:30,209 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-15 17:09:30,209 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-15 17:09:30,209 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-15 17:09:30,212 INFO L732 BasicCegarLoop]: Path program histogram: [108, 34, 1, 1] [2022-03-15 17:09:30,213 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 17:09:30,213 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 17:09:30,215 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 05:09:30 BasicIcfg [2022-03-15 17:09:30,215 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 17:09:30,215 INFO L158 Benchmark]: Toolchain (without parser) took 716245.08ms. Allocated memory was 190.8MB in the beginning and 7.1GB in the end (delta: 6.9GB). Free memory was 147.0MB in the beginning and 5.1GB in the end (delta: -5.0GB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. [2022-03-15 17:09:30,215 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 190.8MB. Free memory is still 148.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 17:09:30,215 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.75ms. Allocated memory is still 190.8MB. Free memory was 147.0MB in the beginning and 145.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 17:09:30,215 INFO L158 Benchmark]: Boogie Preprocessor took 14.31ms. Allocated memory is still 190.8MB. Free memory was 145.5MB in the beginning and 144.5MB in the end (delta: 953.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 17:09:30,215 INFO L158 Benchmark]: RCFGBuilder took 235.75ms. Allocated memory is still 190.8MB. Free memory was 144.4MB in the beginning and 135.2MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 17:09:30,215 INFO L158 Benchmark]: TraceAbstraction took 715971.01ms. Allocated memory was 190.8MB in the beginning and 7.1GB in the end (delta: 6.9GB). Free memory was 134.7MB in the beginning and 5.1GB in the end (delta: -5.0GB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. [2022-03-15 17:09:30,216 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 190.8MB. Free memory is still 148.2MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.75ms. Allocated memory is still 190.8MB. Free memory was 147.0MB in the beginning and 145.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 14.31ms. Allocated memory is still 190.8MB. Free memory was 145.5MB in the beginning and 144.5MB in the end (delta: 953.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 235.75ms. Allocated memory is still 190.8MB. Free memory was 144.4MB in the beginning and 135.2MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 715971.01ms. Allocated memory was 190.8MB in the beginning and 7.1GB in the end (delta: 6.9GB). Free memory was 134.7MB in the beginning and 5.1GB in the end (delta: -5.0GB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 44 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 715.8s, OverallIterations: 144, TraceHistogramMax: 3, PathProgramHistogramMax: 108, EmptinessCheckTime: 4.4s, AutomataDifference: 516.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 89401 SdHoareTripleChecker+Valid, 92.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 89401 mSDsluCounter, 64284 SdHoareTripleChecker+Invalid, 77.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 36050 IncrementalHoareTripleChecker+Unchecked, 106729 mSDsCounter, 19449 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 174283 IncrementalHoareTripleChecker+Invalid, 229782 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19449 mSolverCounterUnsat, 4682 mSDtfsCounter, 174283 mSolverCounterSat, 0.7s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 22696 GetRequests, 6822 SyntacticMatches, 309 SemanticMatches, 15565 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1005048 ImplicationChecksByTransitivity, 415.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38501occurred in iteration=143, InterpolantAutomatonStates: 14355, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 68.1s AutomataMinimizationTime, 144 MinimizatonAttempts, 1375895 StatesRemovedByMinimization, 142 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 88.7s InterpolantComputationTime, 8346 NumberOfCodeBlocks, 8324 NumberOfCodeBlocksAsserted, 509 NumberOfCheckSat, 12070 ConstructedInterpolants, 439 QuantifiedInterpolants, 131339 SizeOfPredicates, 1303 NumberOfNonLiveVariables, 10118 ConjunctsInSsa, 1860 ConjunctsInUnsatCore, 428 InterpolantComputations, 2 PerfectInterpolantSequences, 1464/4111 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown