/usr/bin/java -Xmx16000000000 -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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 17:42:18,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 17:42:18,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 17:42:18,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 17:42:18,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 17:42:18,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 17:42:18,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 17:42:18,527 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-Separate.epf [2022-01-18 17:42:18,558 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 17:42:18,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 17:42:18,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 17:42:18,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 17:42:18,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 17:42:18,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 17:42:18,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 17:42:18,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 17:42:18,560 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 17:42:18,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 17:42:18,561 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 17:42:18,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 17:42:18,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 17:42:18,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 17:42:18,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 17:42:18,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 17:42:18,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 17:42:18,562 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 17:42:18,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 17:42:18,562 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 17:42:18,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 17:42:18,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 17:42:18,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 17:42:18,563 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 17:42:18,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 17:42:18,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:42:18,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 17:42:18,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 17:42:18,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 17:42:18,564 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 17:42:18,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 17:42:18,564 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 17:42:18,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 17:42:18,564 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 17:42:18,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 17:42:18,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 17:42:18,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 17:42:18,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 17:42:18,806 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 17:42:18,807 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 17:42:18,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl [2022-01-18 17:42:18,808 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl' [2022-01-18 17:42:18,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 17:42:18,835 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 17:42:18,836 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 17:42:18,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 17:42:18,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 17:42:18,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:18" (1/1) ... [2022-01-18 17:42:18,855 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:18" (1/1) ... [2022-01-18 17:42:18,861 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 17:42:18,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 17:42:18,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 17:42:18,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 17:42:18,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 17:42:18,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:18" (1/1) ... [2022-01-18 17:42:18,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:18" (1/1) ... [2022-01-18 17:42:18,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:18" (1/1) ... [2022-01-18 17:42:18,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:18" (1/1) ... [2022-01-18 17:42:18,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:18" (1/1) ... [2022-01-18 17:42:18,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:18" (1/1) ... [2022-01-18 17:42:18,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:18" (1/1) ... [2022-01-18 17:42:18,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 17:42:18,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 17:42:18,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 17:42:18,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 17:42:18,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:18" (1/1) ... [2022-01-18 17:42:18,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:42:18,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:18,907 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) [2022-01-18 17:42:18,928 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 [2022-01-18 17:42:18,952 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 17:42:18,953 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 17:42:18,953 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 17:42:18,953 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 17:42:18,953 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 17:42:18,953 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 17:42:18,953 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 17:42:18,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 17:42:18,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 17:42:18,954 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 17:42:18,954 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 17:42:18,954 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 17:42:18,955 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 17:42:18,997 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 17:42:18,998 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 17:42:19,081 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 17:42:19,093 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 17:42:19,093 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 17:42:19,095 INFO L202 PluginConnector]: Adding new model sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:42:19 BoogieIcfgContainer [2022-01-18 17:42:19,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 17:42:19,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 17:42:19,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 17:42:19,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 17:42:19,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:42:18" (1/2) ... [2022-01-18 17:42:19,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5969f53a and model type sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:42:19, skipping insertion in model container [2022-01-18 17:42:19,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:42:19" (2/2) ... [2022-01-18 17:42:19,101 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-array-hom.wvr.bpl [2022-01-18 17:42:19,105 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 17:42:19,105 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 17:42:19,105 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 17:42:19,105 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 17:42:19,140 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 17:42:19,179 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 17:42:19,184 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, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 17:42:19,184 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 17:42:19,207 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-01-18 17:42:19,260 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:19,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 17:42:19,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:19,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:19,271 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:19,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:19,276 INFO L85 PathProgramCache]: Analyzing trace with hash 541406590, now seen corresponding path program 1 times [2022-01-18 17:42:19,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:19,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733028097] [2022-01-18 17:42:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:19,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:19,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:19,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733028097] [2022-01-18 17:42:19,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733028097] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:42:19,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:42:19,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:42:19,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924303060] [2022-01-18 17:42:19,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:42:19,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:42:19,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:19,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:42:19,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:42:19,476 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:19,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:19,547 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2022-01-18 17:42:19,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 17:42:19,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 17:42:19,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:19,563 INFO L225 Difference]: With dead ends: 154 [2022-01-18 17:42:19,564 INFO L226 Difference]: Without dead ends: 154 [2022-01-18 17:42:19,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 17:42:19,568 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 77 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:19,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:42:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-18 17:42:19,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2022-01-18 17:42:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-01-18 17:42:19,642 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2022-01-18 17:42:19,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:19,643 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-01-18 17:42:19,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:19,643 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-01-18 17:42:19,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 17:42:19,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:19,645 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] [2022-01-18 17:42:19,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 17:42:19,646 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:19,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:19,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1033477442, now seen corresponding path program 1 times [2022-01-18 17:42:19,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:19,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361262876] [2022-01-18 17:42:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:19,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:19,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:19,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361262876] [2022-01-18 17:42:19,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361262876] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:42:19,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:42:19,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:42:19,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414042637] [2022-01-18 17:42:19,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:42:19,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 17:42:19,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:19,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 17:42:19,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 17:42:19,737 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:19,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:19,808 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2022-01-18 17:42:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 17:42:19,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 17:42:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:19,814 INFO L225 Difference]: With dead ends: 158 [2022-01-18 17:42:19,814 INFO L226 Difference]: Without dead ends: 158 [2022-01-18 17:42:19,814 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 [2022-01-18 17:42:19,815 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:19,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:42:19,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-18 17:42:19,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-01-18 17:42:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:19,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-01-18 17:42:19,837 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-01-18 17:42:19,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:19,837 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-01-18 17:42:19,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:19,838 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-01-18 17:42:19,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:42:19,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:19,840 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] [2022-01-18 17:42:19,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 17:42:19,841 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:19,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1959936804, now seen corresponding path program 1 times [2022-01-18 17:42:19,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:19,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300747030] [2022-01-18 17:42:19,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:19,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:20,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:20,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300747030] [2022-01-18 17:42:20,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300747030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:20,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365806039] [2022-01-18 17:42:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:20,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:20,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:20,164 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) [2022-01-18 17:42:20,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 17:42:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:20,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 17:42:20,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:20,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:42:20,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 17:42:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:20,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:20,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:20,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-18 17:42:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:20,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365806039] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:20,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:20,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:42:20,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498902983] [2022-01-18 17:42:20,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:20,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:42:20,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:20,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:42:20,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:42:20,974 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:21,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:21,346 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-01-18 17:42:21,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 17:42:21,347 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 17:42:21,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:21,349 INFO L225 Difference]: With dead ends: 366 [2022-01-18 17:42:21,350 INFO L226 Difference]: Without dead ends: 351 [2022-01-18 17:42:21,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:42:21,351 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 192 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:21,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 84 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 243 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2022-01-18 17:42:21,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-18 17:42:21,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-01-18 17:42:21,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:21,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-01-18 17:42:21,368 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-01-18 17:42:21,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:21,368 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-01-18 17:42:21,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:21,369 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-01-18 17:42:21,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:42:21,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:21,371 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] [2022-01-18 17:42:21,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:21,583 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 [2022-01-18 17:42:21,584 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:21,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:21,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2127745896, now seen corresponding path program 2 times [2022-01-18 17:42:21,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:21,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409494739] [2022-01-18 17:42:21,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:21,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:21,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:21,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409494739] [2022-01-18 17:42:21,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409494739] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:21,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114936534] [2022-01-18 17:42:21,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:42:21,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:21,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:21,790 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) [2022-01-18 17:42:21,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 17:42:21,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:42:21,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:21,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 17:42:21,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:22,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:22,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-01-18 17:42:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:22,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:22,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:22,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-18 17:42:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:22,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114936534] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:22,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:22,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-01-18 17:42:22,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357850692] [2022-01-18 17:42:22,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:22,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:42:22,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:22,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:42:22,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:42:22,366 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-01-18 17:42:23,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:23,067 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-01-18 17:42:23,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 17:42:23,067 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 22 [2022-01-18 17:42:23,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:23,070 INFO L225 Difference]: With dead ends: 478 [2022-01-18 17:42:23,070 INFO L226 Difference]: Without dead ends: 463 [2022-01-18 17:42:23,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:42:23,071 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 155 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:23,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 110 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 390 Invalid, 0 Unknown, 128 Unchecked, 0.3s Time] [2022-01-18 17:42:23,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-18 17:42:23,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-01-18 17:42:23,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:23,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-01-18 17:42:23,100 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-01-18 17:42:23,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:23,100 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-01-18 17:42:23,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-01-18 17:42:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-01-18 17:42:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:42:23,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:23,104 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] [2022-01-18 17:42:23,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:23,304 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 [2022-01-18 17:42:23,304 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:23,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:23,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1828972448, now seen corresponding path program 3 times [2022-01-18 17:42:23,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:23,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869245217] [2022-01-18 17:42:23,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:23,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:23,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:23,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869245217] [2022-01-18 17:42:23,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869245217] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:23,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531366167] [2022-01-18 17:42:23,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:42:23,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:23,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:23,492 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) [2022-01-18 17:42:23,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 17:42:23,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:42:23,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:23,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 17:42:23,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:23,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 17:42:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:23,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:23,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:23,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-18 17:42:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:23,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531366167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:23,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:23,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-18 17:42:23,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917973331] [2022-01-18 17:42:23,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:23,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:42:23,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:23,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:42:23,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:42:23,989 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:24,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:24,216 INFO L93 Difference]: Finished difference Result 378 states and 1075 transitions. [2022-01-18 17:42:24,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 17:42:24,216 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 17:42:24,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:24,219 INFO L225 Difference]: With dead ends: 378 [2022-01-18 17:42:24,219 INFO L226 Difference]: Without dead ends: 363 [2022-01-18 17:42:24,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:42:24,220 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:24,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 141 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 261 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2022-01-18 17:42:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-01-18 17:42:24,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 241. [2022-01-18 17:42:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:24,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-01-18 17:42:24,230 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-01-18 17:42:24,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:24,230 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-01-18 17:42:24,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:24,231 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-01-18 17:42:24,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:42:24,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:24,235 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] [2022-01-18 17:42:24,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:24,457 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 [2022-01-18 17:42:24,458 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:24,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:24,458 INFO L85 PathProgramCache]: Analyzing trace with hash -258146848, now seen corresponding path program 4 times [2022-01-18 17:42:24,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:24,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846545333] [2022-01-18 17:42:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:24,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:24,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:24,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846545333] [2022-01-18 17:42:24,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846545333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:24,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56587851] [2022-01-18 17:42:24,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:42:24,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:24,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:24,653 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) [2022-01-18 17:42:24,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 17:42:24,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:42:24,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:24,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 17:42:24,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:24,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:24,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 17:42:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:24,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:25,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:25,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-18 17:42:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:25,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56587851] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:25,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:25,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:42:25,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14435312] [2022-01-18 17:42:25,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:25,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:42:25,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:25,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:42:25,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:42:25,175 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:25,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:25,397 INFO L93 Difference]: Finished difference Result 381 states and 1109 transitions. [2022-01-18 17:42:25,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:42:25,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 17:42:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:25,400 INFO L225 Difference]: With dead ends: 381 [2022-01-18 17:42:25,400 INFO L226 Difference]: Without dead ends: 366 [2022-01-18 17:42:25,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:42:25,401 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:25,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 110 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 209 Invalid, 0 Unknown, 140 Unchecked, 0.1s Time] [2022-01-18 17:42:25,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-01-18 17:42:25,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 250. [2022-01-18 17:42:25,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9437751004016066) internal successors, (733), 249 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:25,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 733 transitions. [2022-01-18 17:42:25,410 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 733 transitions. Word has length 22 [2022-01-18 17:42:25,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:25,410 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 733 transitions. [2022-01-18 17:42:25,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:25,410 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 733 transitions. [2022-01-18 17:42:25,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:42:25,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:25,411 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] [2022-01-18 17:42:25,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:25,632 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 [2022-01-18 17:42:25,632 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:25,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:25,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1789401154, now seen corresponding path program 5 times [2022-01-18 17:42:25,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:25,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893518174] [2022-01-18 17:42:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:25,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:25,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:25,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893518174] [2022-01-18 17:42:25,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893518174] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:25,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65364738] [2022-01-18 17:42:25,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:42:25,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:25,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:25,807 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) [2022-01-18 17:42:25,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 17:42:25,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:42:25,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:25,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 17:42:25,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:26,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:26,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 17:42:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:26,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:26,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:26,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-18 17:42:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:26,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65364738] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:26,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:26,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-18 17:42:26,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145551274] [2022-01-18 17:42:26,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:26,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:42:26,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:26,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:42:26,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:42:26,331 INFO L87 Difference]: Start difference. First operand 250 states and 733 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:27,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:27,048 INFO L93 Difference]: Finished difference Result 654 states and 1825 transitions. [2022-01-18 17:42:27,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 17:42:27,048 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 17:42:27,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:27,052 INFO L225 Difference]: With dead ends: 654 [2022-01-18 17:42:27,052 INFO L226 Difference]: Without dead ends: 625 [2022-01-18 17:42:27,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=790, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:42:27,053 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 173 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:27,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 215 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 344 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-01-18 17:42:27,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-18 17:42:27,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 253. [2022-01-18 17:42:27,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.9404761904761907) internal successors, (741), 252 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 741 transitions. [2022-01-18 17:42:27,065 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 741 transitions. Word has length 22 [2022-01-18 17:42:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:27,067 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 741 transitions. [2022-01-18 17:42:27,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 741 transitions. [2022-01-18 17:42:27,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:42:27,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:27,068 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] [2022-01-18 17:42:27,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:27,275 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 [2022-01-18 17:42:27,276 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:27,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:27,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1022431204, now seen corresponding path program 6 times [2022-01-18 17:42:27,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:27,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157471058] [2022-01-18 17:42:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:27,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:27,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:27,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157471058] [2022-01-18 17:42:27,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157471058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:27,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196887497] [2022-01-18 17:42:27,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:42:27,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:27,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:27,438 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) [2022-01-18 17:42:27,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 17:42:27,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:42:27,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:27,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 17:42:27,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:27,698 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 17:42:27,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 38 [2022-01-18 17:42:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:27,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:27,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:27,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-18 17:42:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:27,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196887497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:27,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:27,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-18 17:42:27,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682445534] [2022-01-18 17:42:27,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:27,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:42:27,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:27,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:42:27,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:42:27,947 INFO L87 Difference]: Start difference. First operand 253 states and 741 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:28,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:28,359 INFO L93 Difference]: Finished difference Result 465 states and 1325 transitions. [2022-01-18 17:42:28,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 17:42:28,359 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 17:42:28,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:28,361 INFO L225 Difference]: With dead ends: 465 [2022-01-18 17:42:28,361 INFO L226 Difference]: Without dead ends: 450 [2022-01-18 17:42:28,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:42:28,362 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 83 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:28,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 195 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 368 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-01-18 17:42:28,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-01-18 17:42:28,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 247. [2022-01-18 17:42:28,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-01-18 17:42:28,370 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-01-18 17:42:28,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:28,371 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-01-18 17:42:28,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:28,371 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-01-18 17:42:28,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:28,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:28,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:28,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:28,586 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 [2022-01-18 17:42:28,587 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:28,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:28,587 INFO L85 PathProgramCache]: Analyzing trace with hash 976010682, now seen corresponding path program 7 times [2022-01-18 17:42:28,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:28,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606211396] [2022-01-18 17:42:28,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:28,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:28,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:28,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606211396] [2022-01-18 17:42:28,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606211396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:28,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255718983] [2022-01-18 17:42:28,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:42:28,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:28,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:28,636 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) [2022-01-18 17:42:28,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 17:42:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:28,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:28,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:28,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:28,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255718983] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:28,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:28,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 17:42:28,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629480683] [2022-01-18 17:42:28,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:28,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:42:28,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:28,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:42:28,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:42:28,885 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:29,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:29,740 INFO L93 Difference]: Finished difference Result 1099 states and 3110 transitions. [2022-01-18 17:42:29,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 17:42:29,741 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:29,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:29,746 INFO L225 Difference]: With dead ends: 1099 [2022-01-18 17:42:29,746 INFO L226 Difference]: Without dead ends: 1099 [2022-01-18 17:42:29,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 17:42:29,748 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 265 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:29,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 216 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:42:29,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-01-18 17:42:29,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 311. [2022-01-18 17:42:29,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.141935483870968) internal successors, (974), 310 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:29,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 974 transitions. [2022-01-18 17:42:29,763 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 974 transitions. Word has length 24 [2022-01-18 17:42:29,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:29,763 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 974 transitions. [2022-01-18 17:42:29,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 974 transitions. [2022-01-18 17:42:29,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:29,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:29,764 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:29,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-18 17:42:29,979 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 [2022-01-18 17:42:29,979 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:29,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:29,980 INFO L85 PathProgramCache]: Analyzing trace with hash -308162, now seen corresponding path program 8 times [2022-01-18 17:42:29,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:29,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871972411] [2022-01-18 17:42:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:29,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:30,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:30,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871972411] [2022-01-18 17:42:30,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871972411] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:30,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180367363] [2022-01-18 17:42:30,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:42:30,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:30,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:30,028 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) [2022-01-18 17:42:30,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 17:42:30,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:42:30,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:30,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:30,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:30,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:30,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180367363] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:30,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:30,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:42:30,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973669405] [2022-01-18 17:42:30,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:30,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:42:30,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:30,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:42:30,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:42:30,323 INFO L87 Difference]: Start difference. First operand 311 states and 974 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) [2022-01-18 17:42:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:32,276 INFO L93 Difference]: Finished difference Result 1794 states and 5013 transitions. [2022-01-18 17:42:32,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 17:42:32,279 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:32,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:32,288 INFO L225 Difference]: With dead ends: 1794 [2022-01-18 17:42:32,288 INFO L226 Difference]: Without dead ends: 1794 [2022-01-18 17:42:32,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 17:42:32,301 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 501 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:32,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 273 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:42:32,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-01-18 17:42:32,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 315. [2022-01-18 17:42:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:32,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-01-18 17:42:32,332 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-01-18 17:42:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:32,334 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-01-18 17:42:32,334 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) [2022-01-18 17:42:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-01-18 17:42:32,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:32,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:32,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:32,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:32,561 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 [2022-01-18 17:42:32,562 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:32,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:32,562 INFO L85 PathProgramCache]: Analyzing trace with hash 566643918, now seen corresponding path program 9 times [2022-01-18 17:42:32,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:32,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40088979] [2022-01-18 17:42:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:32,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:32,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:32,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40088979] [2022-01-18 17:42:32,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40088979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:32,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066863077] [2022-01-18 17:42:32,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:42:32,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:32,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:32,605 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) [2022-01-18 17:42:32,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 17:42:32,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:42:32,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:32,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:32,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:32,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:32,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:32,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066863077] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:32,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:32,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:42:32,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991823390] [2022-01-18 17:42:32,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:32,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:42:32,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:32,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:42:32,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:42:32,852 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:33,736 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-01-18 17:42:33,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 17:42:33,736 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:33,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:33,742 INFO L225 Difference]: With dead ends: 1470 [2022-01-18 17:42:33,742 INFO L226 Difference]: Without dead ends: 1470 [2022-01-18 17:42:33,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 17:42:33,744 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 373 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:33,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 231 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:42:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-01-18 17:42:33,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-01-18 17:42:33,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:33,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-01-18 17:42:33,760 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-01-18 17:42:33,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:33,760 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-01-18 17:42:33,761 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) [2022-01-18 17:42:33,761 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-01-18 17:42:33,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:33,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:33,762 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] [2022-01-18 17:42:33,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:33,975 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 [2022-01-18 17:42:33,975 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:33,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1502782590, now seen corresponding path program 1 times [2022-01-18 17:42:33,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:33,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868804216] [2022-01-18 17:42:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:33,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:34,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:34,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868804216] [2022-01-18 17:42:34,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868804216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:34,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791277159] [2022-01-18 17:42:34,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:34,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:34,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:34,008 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) [2022-01-18 17:42:34,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 17:42:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:34,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:42:34,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:34,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:34,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791277159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:34,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:34,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 17:42:34,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566443766] [2022-01-18 17:42:34,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:34,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:42:34,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:34,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:42:34,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:42:34,199 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:34,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:34,337 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-01-18 17:42:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:42:34,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:34,340 INFO L225 Difference]: With dead ends: 685 [2022-01-18 17:42:34,340 INFO L226 Difference]: Without dead ends: 679 [2022-01-18 17:42:34,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:42:34,340 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 153 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:34,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 40 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:42:34,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-18 17:42:34,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-01-18 17:42:34,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-01-18 17:42:34,352 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-01-18 17:42:34,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:34,352 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-01-18 17:42:34,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:34,352 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-01-18 17:42:34,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:34,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:34,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:34,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:34,567 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 [2022-01-18 17:42:34,567 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:34,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1065813882, now seen corresponding path program 10 times [2022-01-18 17:42:34,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:34,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176448004] [2022-01-18 17:42:34,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:34,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:34,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:34,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176448004] [2022-01-18 17:42:34,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176448004] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:34,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490286041] [2022-01-18 17:42:34,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:42:34,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:34,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:34,615 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) [2022-01-18 17:42:34,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 17:42:34,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:42:34,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:34,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:34,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:34,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:34,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490286041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:34,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:34,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 17:42:34,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446912116] [2022-01-18 17:42:34,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:34,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:42:34,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:34,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:42:34,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:42:34,804 INFO L87 Difference]: Start difference. First operand 429 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:35,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:35,128 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-01-18 17:42:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 17:42:35,129 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:35,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:35,133 INFO L225 Difference]: With dead ends: 1159 [2022-01-18 17:42:35,133 INFO L226 Difference]: Without dead ends: 1111 [2022-01-18 17:42:35,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:42:35,134 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 288 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:35,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 108 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:42:35,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-01-18 17:42:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-01-18 17:42:35,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:35,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-01-18 17:42:35,154 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-01-18 17:42:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:35,154 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-01-18 17:42:35,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-01-18 17:42:35,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:35,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:35,157 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] [2022-01-18 17:42:35,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:35,379 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 [2022-01-18 17:42:35,379 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:35,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:35,379 INFO L85 PathProgramCache]: Analyzing trace with hash 359856550, now seen corresponding path program 2 times [2022-01-18 17:42:35,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:35,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255158144] [2022-01-18 17:42:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:35,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:35,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:35,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255158144] [2022-01-18 17:42:35,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255158144] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:35,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472954736] [2022-01-18 17:42:35,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:42:35,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:35,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:35,410 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) [2022-01-18 17:42:35,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 17:42:35,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:42:35,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:35,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:42:35,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:35,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:35,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472954736] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:35,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:35,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 17:42:35,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032180059] [2022-01-18 17:42:35,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:35,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:42:35,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:35,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:42:35,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:42:35,614 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:35,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:35,795 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-01-18 17:42:35,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 17:42:35,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:35,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:35,801 INFO L225 Difference]: With dead ends: 1267 [2022-01-18 17:42:35,802 INFO L226 Difference]: Without dead ends: 1267 [2022-01-18 17:42:35,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:42:35,802 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 173 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:35,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 66 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:42:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-01-18 17:42:35,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-01-18 17:42:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-01-18 17:42:35,822 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-01-18 17:42:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:35,822 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-01-18 17:42:35,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-01-18 17:42:35,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:35,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:35,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:35,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:36,039 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 [2022-01-18 17:42:36,039 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:36,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:36,040 INFO L85 PathProgramCache]: Analyzing trace with hash -986825016, now seen corresponding path program 11 times [2022-01-18 17:42:36,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:36,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34193203] [2022-01-18 17:42:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:36,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:36,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:36,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34193203] [2022-01-18 17:42:36,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34193203] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:36,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145364590] [2022-01-18 17:42:36,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:42:36,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:36,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:36,089 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) [2022-01-18 17:42:36,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 17:42:36,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:42:36,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:36,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:36,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:36,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:36,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145364590] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:36,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:36,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:42:36,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351789830] [2022-01-18 17:42:36,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:36,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:42:36,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:36,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:42:36,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:42:36,290 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:36,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:36,827 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-01-18 17:42:36,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:42:36,827 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:36,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:36,836 INFO L225 Difference]: With dead ends: 2268 [2022-01-18 17:42:36,836 INFO L226 Difference]: Without dead ends: 2268 [2022-01-18 17:42:36,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:42:36,837 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 273 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:36,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 168 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:42:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-01-18 17:42:36,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-01-18 17:42:36,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:36,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-01-18 17:42:36,862 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-01-18 17:42:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:36,862 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-01-18 17:42:36,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-01-18 17:42:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:36,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:36,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:36,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:37,085 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 [2022-01-18 17:42:37,086 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:37,086 INFO L85 PathProgramCache]: Analyzing trace with hash -201910922, now seen corresponding path program 12 times [2022-01-18 17:42:37,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:37,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940174664] [2022-01-18 17:42:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:37,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:37,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:37,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940174664] [2022-01-18 17:42:37,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940174664] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:37,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363913829] [2022-01-18 17:42:37,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:42:37,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:37,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:37,138 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) [2022-01-18 17:42:37,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 17:42:37,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:42:37,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:37,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:37,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:37,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:37,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363913829] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:37,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:37,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:42:37,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800338281] [2022-01-18 17:42:37,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:37,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:42:37,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:37,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:42:37,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:42:37,326 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:37,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:37,949 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-01-18 17:42:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:42:37,950 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:37,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:37,959 INFO L225 Difference]: With dead ends: 2256 [2022-01-18 17:42:37,959 INFO L226 Difference]: Without dead ends: 2256 [2022-01-18 17:42:37,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 17:42:37,961 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 296 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:37,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 159 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:42:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-01-18 17:42:37,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-01-18 17:42:37,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-01-18 17:42:37,987 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-01-18 17:42:37,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:37,988 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-01-18 17:42:37,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-01-18 17:42:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:37,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:37,990 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:38,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:38,204 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 [2022-01-18 17:42:38,204 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:38,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:38,205 INFO L85 PathProgramCache]: Analyzing trace with hash 186144540, now seen corresponding path program 13 times [2022-01-18 17:42:38,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:38,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287318598] [2022-01-18 17:42:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:38,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:38,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:38,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287318598] [2022-01-18 17:42:38,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287318598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:38,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331936393] [2022-01-18 17:42:38,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:42:38,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:38,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:38,247 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) [2022-01-18 17:42:38,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 17:42:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:38,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:38,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:38,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:38,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331936393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:38,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:38,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-01-18 17:42:38,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836088111] [2022-01-18 17:42:38,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:38,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:42:38,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:38,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:42:38,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:42:38,416 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:38,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:38,681 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-01-18 17:42:38,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 17:42:38,682 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:38,689 INFO L225 Difference]: With dead ends: 1611 [2022-01-18 17:42:38,689 INFO L226 Difference]: Without dead ends: 1611 [2022-01-18 17:42:38,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:42:38,690 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 222 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:38,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 118 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:42:38,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-01-18 17:42:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-01-18 17:42:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:38,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-01-18 17:42:38,712 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-01-18 17:42:38,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:38,712 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-01-18 17:42:38,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:38,713 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-01-18 17:42:38,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:38,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:38,715 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:38,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-18 17:42:38,935 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 [2022-01-18 17:42:38,935 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:38,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash -246732064, now seen corresponding path program 14 times [2022-01-18 17:42:38,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:38,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416175944] [2022-01-18 17:42:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:38,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:38,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:38,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416175944] [2022-01-18 17:42:38,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416175944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:38,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403827956] [2022-01-18 17:42:38,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:42:38,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:38,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:38,982 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) [2022-01-18 17:42:38,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 17:42:39,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:42:39,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:39,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:39,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:39,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:39,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403827956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:39,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:39,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:42:39,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692296202] [2022-01-18 17:42:39,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:39,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:42:39,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:39,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:42:39,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:42:39,171 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:39,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:39,662 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-01-18 17:42:39,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:42:39,662 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:39,670 INFO L225 Difference]: With dead ends: 2408 [2022-01-18 17:42:39,670 INFO L226 Difference]: Without dead ends: 2404 [2022-01-18 17:42:39,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:42:39,671 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 307 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:39,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 147 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:42:39,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-01-18 17:42:39,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-01-18 17:42:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:39,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-01-18 17:42:39,704 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-01-18 17:42:39,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:39,704 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-01-18 17:42:39,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:39,704 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-01-18 17:42:39,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:39,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:39,706 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:39,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:39,928 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 [2022-01-18 17:42:39,928 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:39,929 INFO L85 PathProgramCache]: Analyzing trace with hash -112101728, now seen corresponding path program 15 times [2022-01-18 17:42:39,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:39,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019975525] [2022-01-18 17:42:39,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:39,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:39,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:39,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019975525] [2022-01-18 17:42:39,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019975525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:39,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790930612] [2022-01-18 17:42:39,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:42:39,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:39,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:39,979 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) [2022-01-18 17:42:39,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 17:42:40,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:42:40,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:40,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:40,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:40,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:40,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790930612] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:40,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:40,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:42:40,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209480388] [2022-01-18 17:42:40,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:40,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:42:40,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:40,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:42:40,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:42:40,201 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:41,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:41,133 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-01-18 17:42:41,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 17:42:41,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:41,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:41,143 INFO L225 Difference]: With dead ends: 3509 [2022-01-18 17:42:41,143 INFO L226 Difference]: Without dead ends: 3509 [2022-01-18 17:42:41,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 17:42:41,145 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 470 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:41,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 268 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:42:41,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-01-18 17:42:41,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-01-18 17:42:41,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:41,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-01-18 17:42:41,184 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-01-18 17:42:41,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:41,185 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-01-18 17:42:41,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:41,185 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-01-18 17:42:41,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:41,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:41,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:41,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:41,401 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 [2022-01-18 17:42:41,402 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:41,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:41,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1530937426, now seen corresponding path program 16 times [2022-01-18 17:42:41,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:41,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226869469] [2022-01-18 17:42:41,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:41,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:41,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:41,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226869469] [2022-01-18 17:42:41,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226869469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:41,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530730685] [2022-01-18 17:42:41,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:42:41,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:41,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:41,445 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) [2022-01-18 17:42:41,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 17:42:41,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:42:41,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:41,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:41,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:41,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:41,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530730685] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:41,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:41,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:42:41,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779842018] [2022-01-18 17:42:41,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:41,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:42:41,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:41,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:42:41,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:42:41,667 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:42,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:42,955 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-01-18 17:42:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 17:42:42,956 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:42,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:42,965 INFO L225 Difference]: With dead ends: 3211 [2022-01-18 17:42:42,965 INFO L226 Difference]: Without dead ends: 3207 [2022-01-18 17:42:42,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 17:42:42,969 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 495 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:42,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 270 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:42:42,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-01-18 17:42:43,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-01-18 17:42:43,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:43,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-01-18 17:42:43,015 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-01-18 17:42:43,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:43,015 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-01-18 17:42:43,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:43,016 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-01-18 17:42:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:43,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:43,018 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] [2022-01-18 17:42:43,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:43,239 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 [2022-01-18 17:42:43,239 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:43,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:43,240 INFO L85 PathProgramCache]: Analyzing trace with hash 618651874, now seen corresponding path program 3 times [2022-01-18 17:42:43,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:43,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942218826] [2022-01-18 17:42:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:43,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:43,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:43,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942218826] [2022-01-18 17:42:43,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942218826] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:43,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831286591] [2022-01-18 17:42:43,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:42:43,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:43,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:43,269 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) [2022-01-18 17:42:43,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 17:42:43,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:42:43,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:43,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:42:43,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:43,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:43,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831286591] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:43,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:43,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-01-18 17:42:43,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878981082] [2022-01-18 17:42:43,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:43,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 17:42:43,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:43,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 17:42:43,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-18 17:42:43,417 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:43,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:43,530 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-01-18 17:42:43,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 17:42:43,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:43,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:43,534 INFO L225 Difference]: With dead ends: 1333 [2022-01-18 17:42:43,534 INFO L226 Difference]: Without dead ends: 1333 [2022-01-18 17:42:43,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:42:43,535 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:43,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 51 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:42:43,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-01-18 17:42:43,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-01-18 17:42:43,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:43,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-01-18 17:42:43,557 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-01-18 17:42:43,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:43,557 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-01-18 17:42:43,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:43,557 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-01-18 17:42:43,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:43,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:43,559 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:43,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:43,781 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 [2022-01-18 17:42:43,782 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:43,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:43,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1548851618, now seen corresponding path program 17 times [2022-01-18 17:42:43,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:43,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177908844] [2022-01-18 17:42:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:43,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:43,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:43,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177908844] [2022-01-18 17:42:43,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177908844] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:43,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067744251] [2022-01-18 17:42:43,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:42:43,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:43,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:43,822 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) [2022-01-18 17:42:43,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 17:42:43,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:42:43,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:43,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:43,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:43,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:43,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067744251] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:43,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:43,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 17:42:43,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329660898] [2022-01-18 17:42:43,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:43,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:42:43,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:43,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:42:43,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:42:43,962 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:44,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:44,309 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-01-18 17:42:44,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:42:44,310 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:44,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:44,316 INFO L225 Difference]: With dead ends: 2129 [2022-01-18 17:42:44,316 INFO L226 Difference]: Without dead ends: 2129 [2022-01-18 17:42:44,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:42:44,317 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 176 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:44,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 140 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:42:44,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-01-18 17:42:44,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-01-18 17:42:44,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:44,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-01-18 17:42:44,350 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-01-18 17:42:44,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:44,351 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-01-18 17:42:44,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:44,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-01-18 17:42:44,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:44,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:44,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:44,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:44,567 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 [2022-01-18 17:42:44,567 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:44,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:44,568 INFO L85 PathProgramCache]: Analyzing trace with hash -843436226, now seen corresponding path program 18 times [2022-01-18 17:42:44,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:44,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158620131] [2022-01-18 17:42:44,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:44,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:44,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:44,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158620131] [2022-01-18 17:42:44,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158620131] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:44,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907889199] [2022-01-18 17:42:44,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:42:44,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:44,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:44,602 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) [2022-01-18 17:42:44,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 17:42:44,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:42:44,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:44,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:44,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:44,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:44,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907889199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:44,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:44,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 17:42:44,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862308107] [2022-01-18 17:42:44,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:44,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:42:44,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:44,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:42:44,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:42:44,739 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:45,077 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-01-18 17:42:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:42:45,078 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:45,082 INFO L225 Difference]: With dead ends: 2262 [2022-01-18 17:42:45,082 INFO L226 Difference]: Without dead ends: 2262 [2022-01-18 17:42:45,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:42:45,083 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 163 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:45,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 127 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:42:45,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-01-18 17:42:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-01-18 17:42:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-01-18 17:42:45,114 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-01-18 17:42:45,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:45,114 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-01-18 17:42:45,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-01-18 17:42:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:45,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:45,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:45,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:45,338 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 [2022-01-18 17:42:45,339 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:45,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:45,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1926458882, now seen corresponding path program 19 times [2022-01-18 17:42:45,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:45,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144901636] [2022-01-18 17:42:45,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:45,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:45,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:45,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144901636] [2022-01-18 17:42:45,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144901636] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:45,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613677284] [2022-01-18 17:42:45,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:42:45,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:45,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:45,385 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) [2022-01-18 17:42:45,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 17:42:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:45,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:45,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:45,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:45,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613677284] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:45,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:45,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-01-18 17:42:45,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582970398] [2022-01-18 17:42:45,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:45,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:42:45,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:45,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:42:45,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:42:45,546 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:45,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:45,780 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-01-18 17:42:45,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 17:42:45,780 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:45,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:45,783 INFO L225 Difference]: With dead ends: 1474 [2022-01-18 17:42:45,783 INFO L226 Difference]: Without dead ends: 1464 [2022-01-18 17:42:45,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:42:45,783 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 135 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:45,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 116 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:42:45,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-01-18 17:42:45,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-01-18 17:42:45,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-01-18 17:42:45,806 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-01-18 17:42:45,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:45,806 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-01-18 17:42:45,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:45,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-01-18 17:42:45,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:45,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:45,809 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:45,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-18 17:42:46,019 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 [2022-01-18 17:42:46,019 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:46,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:46,019 INFO L85 PathProgramCache]: Analyzing trace with hash -888257368, now seen corresponding path program 20 times [2022-01-18 17:42:46,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:46,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657153079] [2022-01-18 17:42:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:46,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:46,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:46,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657153079] [2022-01-18 17:42:46,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657153079] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:46,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076968185] [2022-01-18 17:42:46,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:42:46,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:46,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:46,052 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) [2022-01-18 17:42:46,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 17:42:46,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:42:46,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:46,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:46,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:46,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:46,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076968185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:46,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:46,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 17:42:46,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582576267] [2022-01-18 17:42:46,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:46,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:42:46,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:46,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:42:46,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:42:46,180 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:46,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:46,463 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-01-18 17:42:46,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 17:42:46,463 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:46,467 INFO L225 Difference]: With dead ends: 2318 [2022-01-18 17:42:46,467 INFO L226 Difference]: Without dead ends: 2314 [2022-01-18 17:42:46,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:42:46,468 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 179 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:46,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 100 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:42:46,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-01-18 17:42:46,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-01-18 17:42:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-01-18 17:42:46,498 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-01-18 17:42:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:46,498 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-01-18 17:42:46,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-01-18 17:42:46,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:46,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:46,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:46,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:46,715 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 [2022-01-18 17:42:46,715 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:46,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:46,716 INFO L85 PathProgramCache]: Analyzing trace with hash -290920710, now seen corresponding path program 21 times [2022-01-18 17:42:46,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:46,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371970] [2022-01-18 17:42:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:46,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:46,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:46,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371970] [2022-01-18 17:42:46,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371970] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:46,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815031231] [2022-01-18 17:42:46,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:42:46,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:46,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:46,759 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) [2022-01-18 17:42:46,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 17:42:46,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:42:46,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:46,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:46,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:46,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:46,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815031231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:46,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:46,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 17:42:46,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310873102] [2022-01-18 17:42:46,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:46,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:42:46,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:46,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:42:46,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:42:46,913 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:47,234 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-01-18 17:42:47,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 17:42:47,234 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:47,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:47,238 INFO L225 Difference]: With dead ends: 2302 [2022-01-18 17:42:47,238 INFO L226 Difference]: Without dead ends: 2290 [2022-01-18 17:42:47,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:42:47,238 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 230 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:47,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 119 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:42:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-01-18 17:42:47,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-01-18 17:42:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-01-18 17:42:47,261 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-01-18 17:42:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:47,261 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-01-18 17:42:47,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-01-18 17:42:47,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:47,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:47,263 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:47,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 17:42:47,469 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 [2022-01-18 17:42:47,469 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:47,469 INFO L85 PathProgramCache]: Analyzing trace with hash -817340994, now seen corresponding path program 22 times [2022-01-18 17:42:47,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:47,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949192932] [2022-01-18 17:42:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:47,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:47,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:47,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949192932] [2022-01-18 17:42:47,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949192932] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:47,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678557050] [2022-01-18 17:42:47,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:42:47,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:47,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:47,519 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) [2022-01-18 17:42:47,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 17:42:47,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:42:47,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:47,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:47,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:47,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:47,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678557050] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:47,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:47,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:42:47,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108838755] [2022-01-18 17:42:47,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:47,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:42:47,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:47,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:42:47,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:42:47,736 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:48,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:48,549 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-01-18 17:42:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 17:42:48,550 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:48,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:48,558 INFO L225 Difference]: With dead ends: 4760 [2022-01-18 17:42:48,558 INFO L226 Difference]: Without dead ends: 4760 [2022-01-18 17:42:48,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:42:48,559 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 467 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:48,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 192 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:42:48,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-01-18 17:42:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-01-18 17:42:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:48,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-01-18 17:42:48,600 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-01-18 17:42:48,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:48,600 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-01-18 17:42:48,600 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) [2022-01-18 17:42:48,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-01-18 17:42:48,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:48,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:48,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:48,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-18 17:42:48,807 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 [2022-01-18 17:42:48,807 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:48,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:48,808 INFO L85 PathProgramCache]: Analyzing trace with hash -250388914, now seen corresponding path program 23 times [2022-01-18 17:42:48,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:48,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802605720] [2022-01-18 17:42:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:48,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:48,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:48,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802605720] [2022-01-18 17:42:48,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802605720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:48,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382026832] [2022-01-18 17:42:48,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:42:48,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:48,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:48,849 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) [2022-01-18 17:42:48,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 17:42:48,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:42:48,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:48,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:48,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:48,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:49,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382026832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:49,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:49,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:42:49,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602005280] [2022-01-18 17:42:49,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:49,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:42:49,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:49,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:42:49,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:42:49,070 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:49,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:49,739 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-01-18 17:42:49,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:42:49,740 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:49,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:49,747 INFO L225 Difference]: With dead ends: 4260 [2022-01-18 17:42:49,747 INFO L226 Difference]: Without dead ends: 4260 [2022-01-18 17:42:49,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 17:42:49,748 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 512 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:49,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 174 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:42:49,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-01-18 17:42:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-01-18 17:42:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-01-18 17:42:49,814 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-01-18 17:42:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:49,814 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-01-18 17:42:49,814 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) [2022-01-18 17:42:49,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-01-18 17:42:49,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:49,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:49,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:49,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:50,017 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 [2022-01-18 17:42:50,017 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:50,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1422734772, now seen corresponding path program 24 times [2022-01-18 17:42:50,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:50,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934300667] [2022-01-18 17:42:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:50,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:50,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:50,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934300667] [2022-01-18 17:42:50,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934300667] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:50,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306740163] [2022-01-18 17:42:50,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:42:50,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:50,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:50,058 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) [2022-01-18 17:42:50,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 17:42:50,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:42:50,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:50,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:50,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:50,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:50,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306740163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:50,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:50,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 17:42:50,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204937270] [2022-01-18 17:42:50,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:50,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:42:50,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:50,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:42:50,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:42:50,253 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:50,875 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-01-18 17:42:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:42:50,876 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:50,883 INFO L225 Difference]: With dead ends: 4602 [2022-01-18 17:42:50,883 INFO L226 Difference]: Without dead ends: 4602 [2022-01-18 17:42:50,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 17:42:50,885 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 429 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:50,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 162 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:42:50,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-01-18 17:42:50,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-01-18 17:42:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-01-18 17:42:50,935 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-01-18 17:42:50,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:50,935 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-01-18 17:42:50,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:50,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-01-18 17:42:50,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:50,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:50,938 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:50,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-18 17:42:51,151 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 [2022-01-18 17:42:51,151 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:51,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:51,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1341358684, now seen corresponding path program 25 times [2022-01-18 17:42:51,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:51,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006822869] [2022-01-18 17:42:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:51,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:51,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:51,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006822869] [2022-01-18 17:42:51,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006822869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:51,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855855233] [2022-01-18 17:42:51,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:42:51,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:51,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:51,193 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) [2022-01-18 17:42:51,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 17:42:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:51,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:51,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:51,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:51,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855855233] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:51,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:51,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 17:42:51,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971948999] [2022-01-18 17:42:51,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:51,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:42:51,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:51,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:42:51,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:42:51,349 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:51,868 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-01-18 17:42:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:42:51,868 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:51,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:51,875 INFO L225 Difference]: With dead ends: 4348 [2022-01-18 17:42:51,875 INFO L226 Difference]: Without dead ends: 4344 [2022-01-18 17:42:51,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 17:42:51,876 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 421 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:51,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 153 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:42:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-01-18 17:42:51,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-01-18 17:42:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 17:42:51,927 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 17:42:51,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:51,927 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 17:42:51,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:51,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 17:42:51,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:51,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:51,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:51,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:52,143 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 [2022-01-18 17:42:52,143 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:52,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:52,144 INFO L85 PathProgramCache]: Analyzing trace with hash -410701468, now seen corresponding path program 26 times [2022-01-18 17:42:52,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:52,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40661742] [2022-01-18 17:42:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:52,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:52,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:52,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40661742] [2022-01-18 17:42:52,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40661742] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:52,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32958080] [2022-01-18 17:42:52,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:42:52,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:52,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:52,188 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) [2022-01-18 17:42:52,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 17:42:52,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:42:52,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:52,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:52,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:52,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:52,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32958080] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:52,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:52,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:42:52,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449160608] [2022-01-18 17:42:52,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:52,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:42:52,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:52,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:42:52,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:42:52,368 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:52,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:52,980 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-01-18 17:42:52,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 17:42:52,980 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:52,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:52,986 INFO L225 Difference]: With dead ends: 4035 [2022-01-18 17:42:52,986 INFO L226 Difference]: Without dead ends: 4035 [2022-01-18 17:42:52,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 17:42:52,987 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 445 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:52,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 226 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:42:52,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-01-18 17:42:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-01-18 17:42:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:53,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-01-18 17:42:53,020 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-01-18 17:42:53,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:53,021 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-01-18 17:42:53,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:53,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-01-18 17:42:53,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:53,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:53,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:53,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 17:42:53,223 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 [2022-01-18 17:42:53,224 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:53,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:53,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1232337686, now seen corresponding path program 27 times [2022-01-18 17:42:53,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:53,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26156166] [2022-01-18 17:42:53,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:53,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:53,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:53,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26156166] [2022-01-18 17:42:53,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26156166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:53,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202726915] [2022-01-18 17:42:53,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:42:53,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:53,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:53,267 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) [2022-01-18 17:42:53,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 17:42:53,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:42:53,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:53,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:53,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:53,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:42:53,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202726915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:53,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:53,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:42:53,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164249418] [2022-01-18 17:42:53,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:53,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:42:53,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:53,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:42:53,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:42:53,443 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:54,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:54,170 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-01-18 17:42:54,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:42:54,171 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:54,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:54,177 INFO L225 Difference]: With dead ends: 3794 [2022-01-18 17:42:54,177 INFO L226 Difference]: Without dead ends: 3790 [2022-01-18 17:42:54,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 17:42:54,178 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 471 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:54,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 175 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:42:54,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-01-18 17:42:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-01-18 17:42:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 17:42:54,212 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 17:42:54,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:54,212 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 17:42:54,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 17:42:54,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:54,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:54,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:54,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 17:42:54,414 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 [2022-01-18 17:42:54,415 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:54,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:54,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2059201626, now seen corresponding path program 28 times [2022-01-18 17:42:54,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:54,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459415772] [2022-01-18 17:42:54,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:54,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:54,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:54,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459415772] [2022-01-18 17:42:54,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459415772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:54,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916353499] [2022-01-18 17:42:54,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:42:54,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:54,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:54,455 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) [2022-01-18 17:42:54,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 17:42:54,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:42:54,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:54,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:54,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:54,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:54,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916353499] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:54,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:54,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:42:54,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344031607] [2022-01-18 17:42:54,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:54,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:42:54,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:54,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:42:54,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:42:54,610 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:55,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:55,279 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-01-18 17:42:55,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 17:42:55,280 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:55,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:55,286 INFO L225 Difference]: With dead ends: 3978 [2022-01-18 17:42:55,286 INFO L226 Difference]: Without dead ends: 3978 [2022-01-18 17:42:55,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 17:42:55,287 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 171 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:55,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 232 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:42:55,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-01-18 17:42:55,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-01-18 17:42:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:55,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-01-18 17:42:55,326 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-01-18 17:42:55,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:55,326 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-01-18 17:42:55,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:55,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-01-18 17:42:55,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:55,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:55,329 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] [2022-01-18 17:42:55,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-18 17:42:55,529 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 [2022-01-18 17:42:55,529 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:55,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:55,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1977825538, now seen corresponding path program 29 times [2022-01-18 17:42:55,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:55,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760175444] [2022-01-18 17:42:55,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:55,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:55,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:55,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760175444] [2022-01-18 17:42:55,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760175444] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:55,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293847532] [2022-01-18 17:42:55,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:42:55,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:55,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:55,567 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) [2022-01-18 17:42:55,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 17:42:55,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:42:55,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:55,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:55,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:55,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:55,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293847532] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:55,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:55,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:42:55,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422835896] [2022-01-18 17:42:55,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:55,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:42:55,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:55,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:42:55,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:42:55,713 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:56,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:56,289 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-01-18 17:42:56,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:42:56,289 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:56,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:56,295 INFO L225 Difference]: With dead ends: 3706 [2022-01-18 17:42:56,295 INFO L226 Difference]: Without dead ends: 3702 [2022-01-18 17:42:56,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:42:56,296 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 254 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:56,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 160 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:42:56,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-01-18 17:42:56,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-01-18 17:42:56,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-01-18 17:42:56,331 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-01-18 17:42:56,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:56,331 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-01-18 17:42:56,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:56,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-01-18 17:42:56,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:56,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:56,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:56,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:56,556 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 [2022-01-18 17:42:56,556 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash 802049786, now seen corresponding path program 30 times [2022-01-18 17:42:56,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:56,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140144113] [2022-01-18 17:42:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:56,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:56,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:56,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140144113] [2022-01-18 17:42:56,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140144113] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:56,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373297150] [2022-01-18 17:42:56,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:42:56,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:56,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:56,598 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) [2022-01-18 17:42:56,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 17:42:56,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:42:56,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:56,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:56,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:56,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:56,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373297150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:56,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:56,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:42:56,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454393808] [2022-01-18 17:42:56,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:56,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:42:56,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:56,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:42:56,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:42:56,747 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:57,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:57,328 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-01-18 17:42:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:42:57,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:57,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:57,336 INFO L225 Difference]: With dead ends: 4114 [2022-01-18 17:42:57,336 INFO L226 Difference]: Without dead ends: 4102 [2022-01-18 17:42:57,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 17:42:57,337 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 279 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:57,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 206 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:42:57,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-01-18 17:42:57,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-01-18 17:42:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:57,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-01-18 17:42:57,373 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-01-18 17:42:57,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:57,373 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-01-18 17:42:57,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-01-18 17:42:57,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:57,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:57,377 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:57,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 17:42:57,598 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 [2022-01-18 17:42:57,599 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:57,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:57,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1895790794, now seen corresponding path program 31 times [2022-01-18 17:42:57,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:57,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822307541] [2022-01-18 17:42:57,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:57,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:57,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:57,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822307541] [2022-01-18 17:42:57,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822307541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:57,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682718870] [2022-01-18 17:42:57,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:42:57,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:57,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:57,646 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) [2022-01-18 17:42:57,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 17:42:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:57,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:57,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:57,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:57,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682718870] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:57,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:57,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:42:57,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471173512] [2022-01-18 17:42:57,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:57,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:42:57,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:57,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:42:57,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:42:57,864 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:58,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:58,516 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-01-18 17:42:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:42:58,516 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:58,523 INFO L225 Difference]: With dead ends: 3694 [2022-01-18 17:42:58,524 INFO L226 Difference]: Without dead ends: 3694 [2022-01-18 17:42:58,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 17:42:58,524 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 339 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:58,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 284 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:42:58,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-01-18 17:42:58,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-01-18 17:42:58,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:58,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-01-18 17:42:58,561 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-01-18 17:42:58,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:58,561 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-01-18 17:42:58,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:58,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-01-18 17:42:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:58,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:58,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:58,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-18 17:42:58,778 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 [2022-01-18 17:42:58,779 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:58,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:58,779 INFO L85 PathProgramCache]: Analyzing trace with hash -252751640, now seen corresponding path program 32 times [2022-01-18 17:42:58,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:58,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202827695] [2022-01-18 17:42:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:58,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:58,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:58,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202827695] [2022-01-18 17:42:58,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202827695] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:58,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306135013] [2022-01-18 17:42:58,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:42:58,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:58,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:58,824 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) [2022-01-18 17:42:58,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 17:42:58,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:42:58,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:58,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:42:58,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:58,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:59,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306135013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:59,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:59,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:42:59,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764873719] [2022-01-18 17:42:59,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:59,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:42:59,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:59,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:42:59,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:42:59,018 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:59,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:59,779 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-01-18 17:42:59,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 17:42:59,780 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:42:59,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:59,785 INFO L225 Difference]: With dead ends: 3420 [2022-01-18 17:42:59,785 INFO L226 Difference]: Without dead ends: 3416 [2022-01-18 17:42:59,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:42:59,786 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 287 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:59,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 207 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:42:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-01-18 17:42:59,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-01-18 17:42:59,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:59,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-01-18 17:42:59,821 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-01-18 17:42:59,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:59,821 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-01-18 17:42:59,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:59,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-01-18 17:42:59,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:42:59,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:59,825 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:59,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:00,047 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 [2022-01-18 17:43:00,047 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:00,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1520208818, now seen corresponding path program 33 times [2022-01-18 17:43:00,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:00,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678965520] [2022-01-18 17:43:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:00,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:00,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:00,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678965520] [2022-01-18 17:43:00,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678965520] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:00,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545459668] [2022-01-18 17:43:00,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:43:00,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:00,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:00,095 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) [2022-01-18 17:43:00,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 17:43:00,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:43:00,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:00,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:43:00,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:00,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:00,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545459668] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:00,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:00,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 17:43:00,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429615382] [2022-01-18 17:43:00,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:00,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:43:00,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:00,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:43:00,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:43:00,251 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:00,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:00,801 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-01-18 17:43:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 17:43:00,801 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:43:00,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:00,807 INFO L225 Difference]: With dead ends: 3256 [2022-01-18 17:43:00,807 INFO L226 Difference]: Without dead ends: 3244 [2022-01-18 17:43:00,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 17:43:00,807 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 275 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:00,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 153 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:43:00,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-01-18 17:43:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-01-18 17:43:00,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:00,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-01-18 17:43:00,839 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-01-18 17:43:00,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:00,839 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-01-18 17:43:00,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:00,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-01-18 17:43:00,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:43:00,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:00,842 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] [2022-01-18 17:43:00,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:01,042 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 [2022-01-18 17:43:01,043 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:01,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:01,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1154803164, now seen corresponding path program 4 times [2022-01-18 17:43:01,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:01,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677905202] [2022-01-18 17:43:01,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:01,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:01,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:01,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677905202] [2022-01-18 17:43:01,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677905202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:01,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283893769] [2022-01-18 17:43:01,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:43:01,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:01,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:01,260 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) [2022-01-18 17:43:01,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 17:43:01,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:43:01,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:01,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:43:01,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:01,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:01,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:01,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-18 17:43:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:01,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:01,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:01,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:01,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:43:02,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:02,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:02,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:02,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:43:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:02,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283893769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:02,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:02,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:43:02,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513495668] [2022-01-18 17:43:02,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:02,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:43:02,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:02,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:43:02,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:43:02,310 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 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) [2022-01-18 17:43:04,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:04,457 INFO L93 Difference]: Finished difference Result 3843 states and 12416 transitions. [2022-01-18 17:43:04,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 17:43:04,457 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:43:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:04,464 INFO L225 Difference]: With dead ends: 3843 [2022-01-18 17:43:04,464 INFO L226 Difference]: Without dead ends: 3813 [2022-01-18 17:43:04,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=758, Invalid=3148, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 17:43:04,465 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 638 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:04,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 254 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:43:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2022-01-18 17:43:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1792. [2022-01-18 17:43:04,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 3.5907314349525405) internal successors, (6431), 1791 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:04,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6431 transitions. [2022-01-18 17:43:04,498 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6431 transitions. Word has length 26 [2022-01-18 17:43:04,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:04,498 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 6431 transitions. [2022-01-18 17:43:04,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 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) [2022-01-18 17:43:04,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6431 transitions. [2022-01-18 17:43:04,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:43:04,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:04,501 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] [2022-01-18 17:43:04,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-18 17:43:04,701 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 [2022-01-18 17:43:04,702 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:04,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:04,702 INFO L85 PathProgramCache]: Analyzing trace with hash -873594852, now seen corresponding path program 5 times [2022-01-18 17:43:04,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:04,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649247031] [2022-01-18 17:43:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:04,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:04,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:04,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649247031] [2022-01-18 17:43:04,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649247031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:04,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609190453] [2022-01-18 17:43:04,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:43:04,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:04,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:04,934 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) [2022-01-18 17:43:04,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 17:43:04,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:43:04,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:04,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 17:43:04,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:05,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:05,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:05,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-18 17:43:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:05,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:05,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:05,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:05,576 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 21 treesize of output 56 [2022-01-18 17:43:05,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:05,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:05,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:05,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:43:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:06,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609190453] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:06,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:06,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 17:43:06,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710699740] [2022-01-18 17:43:06,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:06,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:43:06,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:06,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:43:06,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:43:06,018 INFO L87 Difference]: Start difference. First operand 1792 states and 6431 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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) [2022-01-18 17:43:10,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:10,125 INFO L93 Difference]: Finished difference Result 4418 states and 14016 transitions. [2022-01-18 17:43:10,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 17:43:10,125 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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 [2022-01-18 17:43:10,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:10,132 INFO L225 Difference]: With dead ends: 4418 [2022-01-18 17:43:10,132 INFO L226 Difference]: Without dead ends: 4381 [2022-01-18 17:43:10,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3042 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1244, Invalid=7686, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 17:43:10,134 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 614 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 2076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:10,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 434 Invalid, 2076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1821 Invalid, 0 Unknown, 139 Unchecked, 1.0s Time] [2022-01-18 17:43:10,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4381 states. [2022-01-18 17:43:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4381 to 1844. [2022-01-18 17:43:10,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 3.583288117200217) internal successors, (6604), 1843 states have internal predecessors, (6604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:10,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 6604 transitions. [2022-01-18 17:43:10,174 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 6604 transitions. Word has length 26 [2022-01-18 17:43:10,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:10,174 INFO L470 AbstractCegarLoop]: Abstraction has 1844 states and 6604 transitions. [2022-01-18 17:43:10,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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) [2022-01-18 17:43:10,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 6604 transitions. [2022-01-18 17:43:10,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:43:10,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:10,177 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:10,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 17:43:10,379 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 [2022-01-18 17:43:10,379 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:10,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:10,379 INFO L85 PathProgramCache]: Analyzing trace with hash 717834456, now seen corresponding path program 34 times [2022-01-18 17:43:10,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:10,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665362425] [2022-01-18 17:43:10,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:10,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:10,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:10,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665362425] [2022-01-18 17:43:10,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665362425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:10,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6993212] [2022-01-18 17:43:10,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:43:10,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:10,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:10,677 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) [2022-01-18 17:43:10,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 17:43:10,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:43:10,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:10,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:43:10,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:11,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:11,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:11,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:11,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-01-18 17:43:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:11,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:11,195 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:43:11,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 47 [2022-01-18 17:43:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:11,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6993212] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:11,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:11,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 17:43:11,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037058819] [2022-01-18 17:43:11,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:11,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:43:11,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:11,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:43:11,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:43:11,329 INFO L87 Difference]: Start difference. First operand 1844 states and 6604 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:14,325 INFO L93 Difference]: Finished difference Result 3646 states and 12238 transitions. [2022-01-18 17:43:14,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 17:43:14,325 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:43:14,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:14,331 INFO L225 Difference]: With dead ends: 3646 [2022-01-18 17:43:14,331 INFO L226 Difference]: Without dead ends: 3616 [2022-01-18 17:43:14,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=943, Invalid=5219, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 17:43:14,333 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 304 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:14,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 375 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2009 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:43:14,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3616 states. [2022-01-18 17:43:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3616 to 1896. [2022-01-18 17:43:14,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.5736147757255936) internal successors, (6772), 1895 states have internal predecessors, (6772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6772 transitions. [2022-01-18 17:43:14,369 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6772 transitions. Word has length 26 [2022-01-18 17:43:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:14,369 INFO L470 AbstractCegarLoop]: Abstraction has 1896 states and 6772 transitions. [2022-01-18 17:43:14,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6772 transitions. [2022-01-18 17:43:14,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:43:14,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:14,373 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] [2022-01-18 17:43:14,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:14,573 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 [2022-01-18 17:43:14,573 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:14,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:14,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1522881632, now seen corresponding path program 6 times [2022-01-18 17:43:14,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:14,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325924045] [2022-01-18 17:43:14,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:14,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:14,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:14,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325924045] [2022-01-18 17:43:14,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325924045] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:14,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471022984] [2022-01-18 17:43:14,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:43:14,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:14,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:14,816 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) [2022-01-18 17:43:14,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 17:43:14,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:43:14,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:14,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 17:43:14,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:15,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:15,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:15,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-18 17:43:15,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:15,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:15,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:15,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:15,400 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 21 treesize of output 56 [2022-01-18 17:43:15,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:15,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:15,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:15,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:43:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:15,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471022984] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:15,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:15,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:43:15,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237031356] [2022-01-18 17:43:15,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:15,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:43:15,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:15,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:43:15,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:43:15,797 INFO L87 Difference]: Start difference. First operand 1896 states and 6772 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:18,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:18,547 INFO L93 Difference]: Finished difference Result 4636 states and 14530 transitions. [2022-01-18 17:43:18,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 17:43:18,548 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:43:18,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:18,556 INFO L225 Difference]: With dead ends: 4636 [2022-01-18 17:43:18,556 INFO L226 Difference]: Without dead ends: 4621 [2022-01-18 17:43:18,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=992, Invalid=4120, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 17:43:18,557 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 783 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:18,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 365 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1238 Invalid, 0 Unknown, 175 Unchecked, 0.7s Time] [2022-01-18 17:43:18,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4621 states. [2022-01-18 17:43:18,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4621 to 1956. [2022-01-18 17:43:18,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 3.5611253196930948) internal successors, (6962), 1955 states have internal predecessors, (6962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 6962 transitions. [2022-01-18 17:43:18,616 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 6962 transitions. Word has length 26 [2022-01-18 17:43:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:18,617 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 6962 transitions. [2022-01-18 17:43:18,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:18,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 6962 transitions. [2022-01-18 17:43:18,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:43:18,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:18,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:18,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-18 17:43:18,820 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 [2022-01-18 17:43:18,821 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:18,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:18,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1221704100, now seen corresponding path program 35 times [2022-01-18 17:43:18,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:18,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41441341] [2022-01-18 17:43:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:18,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:19,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:19,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41441341] [2022-01-18 17:43:19,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41441341] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:19,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216186146] [2022-01-18 17:43:19,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:43:19,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:19,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:19,098 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) [2022-01-18 17:43:19,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 17:43:19,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:43:19,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:19,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:43:19,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:19,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:19,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:19,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:19,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-01-18 17:43:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:19,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:19,574 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:43:19,574 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 47 [2022-01-18 17:43:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:19,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216186146] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:19,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:19,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 17:43:19,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212158161] [2022-01-18 17:43:19,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:19,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:43:19,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:19,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:43:19,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:43:19,731 INFO L87 Difference]: Start difference. First operand 1956 states and 6962 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:23,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:23,576 INFO L93 Difference]: Finished difference Result 4533 states and 14855 transitions. [2022-01-18 17:43:23,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 17:43:23,577 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:43:23,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:23,586 INFO L225 Difference]: With dead ends: 4533 [2022-01-18 17:43:23,586 INFO L226 Difference]: Without dead ends: 4471 [2022-01-18 17:43:23,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3555 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1607, Invalid=8293, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 17:43:23,588 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 468 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 2192 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 2301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:23,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 536 Invalid, 2301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2192 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 17:43:23,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4471 states. [2022-01-18 17:43:23,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4471 to 1997. [2022-01-18 17:43:23,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1996 states have (on average 3.561623246492986) internal successors, (7109), 1996 states have internal predecessors, (7109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 7109 transitions. [2022-01-18 17:43:23,645 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 7109 transitions. Word has length 26 [2022-01-18 17:43:23,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:23,645 INFO L470 AbstractCegarLoop]: Abstraction has 1997 states and 7109 transitions. [2022-01-18 17:43:23,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 7109 transitions. [2022-01-18 17:43:23,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:43:23,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:23,650 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:23,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:23,862 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 [2022-01-18 17:43:23,862 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:23,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:23,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2096944352, now seen corresponding path program 36 times [2022-01-18 17:43:23,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:23,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925016409] [2022-01-18 17:43:23,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:23,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:24,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:24,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:24,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925016409] [2022-01-18 17:43:24,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925016409] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:24,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640997203] [2022-01-18 17:43:24,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:43:24,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:24,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:24,148 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) [2022-01-18 17:43:24,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 17:43:24,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:43:24,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:24,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:43:24,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:24,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:24,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:24,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:24,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2022-01-18 17:43:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:24,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:24,702 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:43:24,703 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 47 [2022-01-18 17:43:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:25,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640997203] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:25,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:25,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-01-18 17:43:25,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236633078] [2022-01-18 17:43:25,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:25,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:43:25,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:25,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:43:25,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:43:25,095 INFO L87 Difference]: Start difference. First operand 1997 states and 7109 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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) [2022-01-18 17:43:34,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:34,038 INFO L93 Difference]: Finished difference Result 4887 states and 16148 transitions. [2022-01-18 17:43:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-18 17:43:34,038 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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 26 [2022-01-18 17:43:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:34,047 INFO L225 Difference]: With dead ends: 4887 [2022-01-18 17:43:34,047 INFO L226 Difference]: Without dead ends: 4872 [2022-01-18 17:43:34,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8705 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2599, Invalid=21271, Unknown=0, NotChecked=0, Total=23870 [2022-01-18 17:43:34,048 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 399 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 4088 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 4826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 4088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 681 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:34,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 912 Invalid, 4826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 4088 Invalid, 0 Unknown, 681 Unchecked, 1.9s Time] [2022-01-18 17:43:34,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2022-01-18 17:43:34,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 2011. [2022-01-18 17:43:34,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2011 states, 2010 states have (on average 3.5621890547263684) internal successors, (7160), 2010 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 7160 transitions. [2022-01-18 17:43:34,094 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 7160 transitions. Word has length 26 [2022-01-18 17:43:34,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:34,094 INFO L470 AbstractCegarLoop]: Abstraction has 2011 states and 7160 transitions. [2022-01-18 17:43:34,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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) [2022-01-18 17:43:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 7160 transitions. [2022-01-18 17:43:34,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:43:34,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:34,098 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] [2022-01-18 17:43:34,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 17:43:34,298 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 [2022-01-18 17:43:34,299 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:34,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:34,299 INFO L85 PathProgramCache]: Analyzing trace with hash -964441720, now seen corresponding path program 7 times [2022-01-18 17:43:34,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:34,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060734190] [2022-01-18 17:43:34,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:34,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:34,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:34,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060734190] [2022-01-18 17:43:34,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060734190] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:34,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725355444] [2022-01-18 17:43:34,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:43:34,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:34,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:34,527 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) [2022-01-18 17:43:34,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 17:43:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:34,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:43:34,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:34,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:34,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:34,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-18 17:43:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:34,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:35,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:35,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:35,075 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 21 treesize of output 56 [2022-01-18 17:43:35,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:35,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:35,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:35,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:43:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:35,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725355444] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:35,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:35,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:43:35,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811531417] [2022-01-18 17:43:35,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:35,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:43:35,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:35,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:43:35,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:43:35,462 INFO L87 Difference]: Start difference. First operand 2011 states and 7160 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:37,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:37,424 INFO L93 Difference]: Finished difference Result 4138 states and 13429 transitions. [2022-01-18 17:43:37,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:43:37,425 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:43:37,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:37,432 INFO L225 Difference]: With dead ends: 4138 [2022-01-18 17:43:37,432 INFO L226 Difference]: Without dead ends: 4108 [2022-01-18 17:43:37,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=692, Invalid=2848, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 17:43:37,433 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 467 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:37,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 302 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:43:37,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2022-01-18 17:43:37,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 2031. [2022-01-18 17:43:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 3.5610837438423646) internal successors, (7229), 2030 states have internal predecessors, (7229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:37,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 7229 transitions. [2022-01-18 17:43:37,488 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 7229 transitions. Word has length 26 [2022-01-18 17:43:37,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:37,488 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 7229 transitions. [2022-01-18 17:43:37,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:37,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 7229 transitions. [2022-01-18 17:43:37,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:43:37,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:37,493 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] [2022-01-18 17:43:37,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-18 17:43:37,715 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 [2022-01-18 17:43:37,715 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:37,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2016520892, now seen corresponding path program 8 times [2022-01-18 17:43:37,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:37,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556562956] [2022-01-18 17:43:37,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:37,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:37,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:37,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556562956] [2022-01-18 17:43:37,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556562956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:37,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809211937] [2022-01-18 17:43:37,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:43:37,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:37,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:37,940 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) [2022-01-18 17:43:37,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 17:43:37,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:43:37,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:37,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 17:43:37,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:38,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:38,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:38,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 34 [2022-01-18 17:43:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:38,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:38,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:38,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:38,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:38,839 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 21 treesize of output 48 [2022-01-18 17:43:38,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:38,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-01-18 17:43:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:39,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809211937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:39,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:39,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 17:43:39,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454415127] [2022-01-18 17:43:39,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:39,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:43:39,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:39,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:43:39,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:43:39,042 INFO L87 Difference]: Start difference. First operand 2031 states and 7229 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:45,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:45,233 INFO L93 Difference]: Finished difference Result 5067 states and 16485 transitions. [2022-01-18 17:43:45,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 17:43:45,234 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:43:45,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:45,242 INFO L225 Difference]: With dead ends: 5067 [2022-01-18 17:43:45,242 INFO L226 Difference]: Without dead ends: 5022 [2022-01-18 17:43:45,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3961 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1904, Invalid=9652, Unknown=0, NotChecked=0, Total=11556 [2022-01-18 17:43:45,243 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 629 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 2414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 425 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:45,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 693 Invalid, 2414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1880 Invalid, 0 Unknown, 425 Unchecked, 1.0s Time] [2022-01-18 17:43:45,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5022 states. [2022-01-18 17:43:45,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5022 to 2104. [2022-01-18 17:43:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 3.5658582976699953) internal successors, (7499), 2103 states have internal predecessors, (7499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 7499 transitions. [2022-01-18 17:43:45,290 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 7499 transitions. Word has length 26 [2022-01-18 17:43:45,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:45,290 INFO L470 AbstractCegarLoop]: Abstraction has 2104 states and 7499 transitions. [2022-01-18 17:43:45,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:45,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 7499 transitions. [2022-01-18 17:43:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:43:45,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:45,294 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] [2022-01-18 17:43:45,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:45,494 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 [2022-01-18 17:43:45,494 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:45,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:45,494 INFO L85 PathProgramCache]: Analyzing trace with hash 784538682, now seen corresponding path program 9 times [2022-01-18 17:43:45,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:45,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053193202] [2022-01-18 17:43:45,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:45,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:45,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:45,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053193202] [2022-01-18 17:43:45,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053193202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:45,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685590904] [2022-01-18 17:43:45,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:43:45,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:45,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:45,716 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) [2022-01-18 17:43:45,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 17:43:45,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:43:45,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:45,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:43:45,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:46,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:46,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:46,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 17:43:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:46,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:46,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:46,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:46,308 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 21 treesize of output 56 [2022-01-18 17:43:46,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:46,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:46,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:46,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:43:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:46,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685590904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:46,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:46,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:43:46,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705171383] [2022-01-18 17:43:46,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:46,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:43:46,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:46,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:43:46,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:43:46,717 INFO L87 Difference]: Start difference. First operand 2104 states and 7499 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:48,560 INFO L93 Difference]: Finished difference Result 4259 states and 13862 transitions. [2022-01-18 17:43:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 17:43:48,560 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:43:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:48,567 INFO L225 Difference]: With dead ends: 4259 [2022-01-18 17:43:48,568 INFO L226 Difference]: Without dead ends: 4244 [2022-01-18 17:43:48,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=710, Invalid=2950, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:43:48,568 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 503 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:48,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 263 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1122 Invalid, 0 Unknown, 22 Unchecked, 0.6s Time] [2022-01-18 17:43:48,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4244 states. [2022-01-18 17:43:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4244 to 2123. [2022-01-18 17:43:48,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 3.5607917059377945) internal successors, (7556), 2122 states have internal predecessors, (7556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 7556 transitions. [2022-01-18 17:43:48,611 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 7556 transitions. Word has length 26 [2022-01-18 17:43:48,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:48,611 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 7556 transitions. [2022-01-18 17:43:48,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 7556 transitions. [2022-01-18 17:43:48,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:43:48,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:48,616 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] [2022-01-18 17:43:48,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:48,835 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 [2022-01-18 17:43:48,835 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:48,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:48,836 INFO L85 PathProgramCache]: Analyzing trace with hash 116575752, now seen corresponding path program 10 times [2022-01-18 17:43:48,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:48,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971661656] [2022-01-18 17:43:48,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:48,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:49,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:49,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971661656] [2022-01-18 17:43:49,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971661656] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:49,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100186674] [2022-01-18 17:43:49,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:43:49,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:49,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:49,045 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) [2022-01-18 17:43:49,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 17:43:49,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:43:49,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:49,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:43:49,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:49,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:49,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:49,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-18 17:43:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:49,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:49,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:49,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:49,580 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 21 treesize of output 56 [2022-01-18 17:43:49,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:49,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:49,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:49,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:43:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:49,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100186674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:49,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:49,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:43:49,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800269426] [2022-01-18 17:43:49,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:49,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:43:49,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:49,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:43:49,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:43:49,951 INFO L87 Difference]: Start difference. First operand 2123 states and 7556 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:51,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:51,861 INFO L93 Difference]: Finished difference Result 4248 states and 13825 transitions. [2022-01-18 17:43:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 17:43:51,861 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:43:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:51,869 INFO L225 Difference]: With dead ends: 4248 [2022-01-18 17:43:51,869 INFO L226 Difference]: Without dead ends: 4241 [2022-01-18 17:43:51,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=710, Invalid=2950, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:43:51,870 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 553 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:51,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 307 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1311 Invalid, 0 Unknown, 109 Unchecked, 0.7s Time] [2022-01-18 17:43:51,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2022-01-18 17:43:51,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 2112. [2022-01-18 17:43:51,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 3.5641875888204644) internal successors, (7524), 2111 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:51,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 7524 transitions. [2022-01-18 17:43:51,911 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 7524 transitions. Word has length 26 [2022-01-18 17:43:51,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:51,912 INFO L470 AbstractCegarLoop]: Abstraction has 2112 states and 7524 transitions. [2022-01-18 17:43:51,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:51,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 7524 transitions. [2022-01-18 17:43:51,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:43:51,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:51,915 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] [2022-01-18 17:43:51,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 17:43:52,115 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 [2022-01-18 17:43:52,116 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:52,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:52,116 INFO L85 PathProgramCache]: Analyzing trace with hash -635282148, now seen corresponding path program 11 times [2022-01-18 17:43:52,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:52,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823169160] [2022-01-18 17:43:52,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:52,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:52,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:52,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823169160] [2022-01-18 17:43:52,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823169160] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:52,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436606791] [2022-01-18 17:43:52,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:43:52,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:52,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:52,303 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:52,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 17:43:52,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:43:52,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:52,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:43:52,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:52,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:52,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:52,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:52,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2022-01-18 17:43:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:52,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:52,870 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:43:52,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:43:53,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:53,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:53,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:53,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:43:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:53,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436606791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:53,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:53,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:43:53,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818420286] [2022-01-18 17:43:53,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:53,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:43:53,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:53,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:43:53,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:43:53,216 INFO L87 Difference]: Start difference. First operand 2112 states and 7524 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:58,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:58,824 INFO L93 Difference]: Finished difference Result 4818 states and 15705 transitions. [2022-01-18 17:43:58,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 17:43:58,824 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:43:58,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:58,833 INFO L225 Difference]: With dead ends: 4818 [2022-01-18 17:43:58,833 INFO L226 Difference]: Without dead ends: 4788 [2022-01-18 17:43:58,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3590 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1445, Invalid=9475, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 17:43:58,834 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 416 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 3492 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 3563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:58,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 741 Invalid, 3563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3492 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 17:43:58,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4788 states. [2022-01-18 17:43:58,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4788 to 2127. [2022-01-18 17:43:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 2126 states have (on average 3.5696142991533395) internal successors, (7589), 2126 states have internal predecessors, (7589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 7589 transitions. [2022-01-18 17:43:58,882 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 7589 transitions. Word has length 26 [2022-01-18 17:43:58,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:58,882 INFO L470 AbstractCegarLoop]: Abstraction has 2127 states and 7589 transitions. [2022-01-18 17:43:58,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:58,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 7589 transitions. [2022-01-18 17:43:58,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:43:58,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:58,885 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] [2022-01-18 17:43:58,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:59,085 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 [2022-01-18 17:43:59,086 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:59,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:59,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1903957512, now seen corresponding path program 12 times [2022-01-18 17:43:59,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:59,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267389000] [2022-01-18 17:43:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:59,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:59,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:59,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267389000] [2022-01-18 17:43:59,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267389000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:59,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989330922] [2022-01-18 17:43:59,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:43:59,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:59,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:59,320 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) [2022-01-18 17:43:59,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 17:43:59,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:43:59,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:59,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:43:59,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:59,611 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-01-18 17:43:59,612 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 63 [2022-01-18 17:43:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:59,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:59,872 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:43:59,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:44:00,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:00,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:00,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:00,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:44:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:00,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989330922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:00,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:00,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:44:00,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382906652] [2022-01-18 17:44:00,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:00,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:44:00,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:00,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:44:00,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:44:00,213 INFO L87 Difference]: Start difference. First operand 2127 states and 7589 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:05,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:05,059 INFO L93 Difference]: Finished difference Result 4503 states and 14748 transitions. [2022-01-18 17:44:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 17:44:05,059 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:44:05,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:05,067 INFO L225 Difference]: With dead ends: 4503 [2022-01-18 17:44:05,067 INFO L226 Difference]: Without dead ends: 4473 [2022-01-18 17:44:05,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2738 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1209, Invalid=7163, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 17:44:05,068 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 463 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 2405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:05,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 478 Invalid, 2405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2321 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 17:44:05,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4473 states. [2022-01-18 17:44:05,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4473 to 2130. [2022-01-18 17:44:05,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 2129 states have (on average 3.5720995772663224) internal successors, (7605), 2129 states have internal predecessors, (7605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:05,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 7605 transitions. [2022-01-18 17:44:05,115 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 7605 transitions. Word has length 26 [2022-01-18 17:44:05,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:05,116 INFO L470 AbstractCegarLoop]: Abstraction has 2130 states and 7605 transitions. [2022-01-18 17:44:05,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:05,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 7605 transitions. [2022-01-18 17:44:05,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:05,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:05,119 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] [2022-01-18 17:44:05,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:05,319 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 [2022-01-18 17:44:05,320 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:05,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:05,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1496339428, now seen corresponding path program 13 times [2022-01-18 17:44:05,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:05,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992049402] [2022-01-18 17:44:05,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:05,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:05,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:05,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992049402] [2022-01-18 17:44:05,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992049402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:05,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105879908] [2022-01-18 17:44:05,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:44:05,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:05,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:05,535 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) [2022-01-18 17:44:05,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 17:44:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:05,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:44:05,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:05,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:05,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:05,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 17:44:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:05,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:06,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:06,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:06,109 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 21 treesize of output 56 [2022-01-18 17:44:06,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:06,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:06,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:06,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:44:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:06,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105879908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:06,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:06,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:44:06,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084212038] [2022-01-18 17:44:06,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:06,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:44:06,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:06,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:44:06,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:44:06,489 INFO L87 Difference]: Start difference. First operand 2130 states and 7605 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:10,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:10,045 INFO L93 Difference]: Finished difference Result 5861 states and 18618 transitions. [2022-01-18 17:44:10,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 17:44:10,045 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:44:10,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:10,056 INFO L225 Difference]: With dead ends: 5861 [2022-01-18 17:44:10,056 INFO L226 Difference]: Without dead ends: 5831 [2022-01-18 17:44:10,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2312 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1359, Invalid=4961, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 17:44:10,056 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 600 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:10,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 472 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1613 Invalid, 0 Unknown, 200 Unchecked, 0.8s Time] [2022-01-18 17:44:10,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5831 states. [2022-01-18 17:44:10,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5831 to 2263. [2022-01-18 17:44:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 3.609637488947834) internal successors, (8165), 2262 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 8165 transitions. [2022-01-18 17:44:10,108 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 8165 transitions. Word has length 26 [2022-01-18 17:44:10,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:10,109 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 8165 transitions. [2022-01-18 17:44:10,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:10,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 8165 transitions. [2022-01-18 17:44:10,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:10,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:10,113 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] [2022-01-18 17:44:10,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:10,313 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 [2022-01-18 17:44:10,313 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:10,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:10,314 INFO L85 PathProgramCache]: Analyzing trace with hash 93530948, now seen corresponding path program 14 times [2022-01-18 17:44:10,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:10,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448565557] [2022-01-18 17:44:10,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:10,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:10,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:10,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448565557] [2022-01-18 17:44:10,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448565557] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:10,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27076396] [2022-01-18 17:44:10,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:44:10,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:10,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:10,534 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) [2022-01-18 17:44:10,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 17:44:10,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:44:10,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:10,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:44:10,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:10,867 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 17:44:10,868 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 62 [2022-01-18 17:44:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:11,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:11,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:11,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:11,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:11,462 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 38 treesize of output 55 [2022-01-18 17:44:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:11,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27076396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:11,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:11,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 17:44:11,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427251068] [2022-01-18 17:44:11,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:11,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:44:11,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:11,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:44:11,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:44:11,701 INFO L87 Difference]: Start difference. First operand 2263 states and 8165 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:25,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:25,788 INFO L93 Difference]: Finished difference Result 6719 states and 22167 transitions. [2022-01-18 17:44:25,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-01-18 17:44:25,791 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:44:25,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:25,804 INFO L225 Difference]: With dead ends: 6719 [2022-01-18 17:44:25,804 INFO L226 Difference]: Without dead ends: 6704 [2022-01-18 17:44:25,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15542 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=5109, Invalid=32721, Unknown=0, NotChecked=0, Total=37830 [2022-01-18 17:44:25,806 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 682 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 2526 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 3558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 894 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:25,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1057 Invalid, 3558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2526 Invalid, 0 Unknown, 894 Unchecked, 1.4s Time] [2022-01-18 17:44:25,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6704 states. [2022-01-18 17:44:25,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6704 to 2276. [2022-01-18 17:44:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 3.6145054945054946) internal successors, (8223), 2275 states have internal predecessors, (8223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 8223 transitions. [2022-01-18 17:44:25,867 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 8223 transitions. Word has length 26 [2022-01-18 17:44:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:25,867 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 8223 transitions. [2022-01-18 17:44:25,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 8223 transitions. [2022-01-18 17:44:25,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:25,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:25,871 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] [2022-01-18 17:44:25,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-18 17:44:26,080 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 [2022-01-18 17:44:26,080 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:26,080 INFO L85 PathProgramCache]: Analyzing trace with hash -957049752, now seen corresponding path program 15 times [2022-01-18 17:44:26,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:26,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054789947] [2022-01-18 17:44:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:26,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:26,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:26,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054789947] [2022-01-18 17:44:26,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054789947] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:26,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618121175] [2022-01-18 17:44:26,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:44:26,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:26,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:26,305 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) [2022-01-18 17:44:26,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 17:44:26,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:44:26,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:26,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:44:26,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:26,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:26,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:26,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 17:44:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:26,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:26,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:26,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:26,957 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 21 treesize of output 56 [2022-01-18 17:44:27,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:27,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:27,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:27,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:44:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:27,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618121175] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:27,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:27,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:44:27,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308271864] [2022-01-18 17:44:27,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:27,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:44:27,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:27,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:44:27,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:44:27,327 INFO L87 Difference]: Start difference. First operand 2276 states and 8223 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:31,682 INFO L93 Difference]: Finished difference Result 6246 states and 20287 transitions. [2022-01-18 17:44:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 17:44:31,682 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:44:31,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:31,694 INFO L225 Difference]: With dead ends: 6246 [2022-01-18 17:44:31,694 INFO L226 Difference]: Without dead ends: 6216 [2022-01-18 17:44:31,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2855 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1670, Invalid=6340, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 17:44:31,695 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 670 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:31,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 559 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1829 Invalid, 0 Unknown, 247 Unchecked, 0.9s Time] [2022-01-18 17:44:31,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6216 states. [2022-01-18 17:44:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6216 to 2308. [2022-01-18 17:44:31,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 3.6289553532726484) internal successors, (8372), 2307 states have internal predecessors, (8372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 8372 transitions. [2022-01-18 17:44:31,749 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 8372 transitions. Word has length 26 [2022-01-18 17:44:31,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:31,749 INFO L470 AbstractCegarLoop]: Abstraction has 2308 states and 8372 transitions. [2022-01-18 17:44:31,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:31,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 8372 transitions. [2022-01-18 17:44:31,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:31,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:31,753 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] [2022-01-18 17:44:31,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 17:44:31,953 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 [2022-01-18 17:44:31,953 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:31,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:31,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1503265304, now seen corresponding path program 16 times [2022-01-18 17:44:31,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:31,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345183251] [2022-01-18 17:44:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:31,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:32,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:32,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345183251] [2022-01-18 17:44:32,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345183251] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:32,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86702833] [2022-01-18 17:44:32,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:44:32,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:32,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:32,196 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) [2022-01-18 17:44:32,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 17:44:32,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:44:32,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:32,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:44:32,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:32,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:32,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:32,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 17:44:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:32,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:32,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:32,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:32,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:44:32,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:32,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:32,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:32,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:44:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:33,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86702833] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:33,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:33,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:44:33,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680015234] [2022-01-18 17:44:33,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:33,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:44:33,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:33,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:44:33,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:44:33,154 INFO L87 Difference]: Start difference. First operand 2308 states and 8372 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:35,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:35,909 INFO L93 Difference]: Finished difference Result 5384 states and 17521 transitions. [2022-01-18 17:44:35,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 17:44:35,909 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:44:35,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:35,919 INFO L225 Difference]: With dead ends: 5384 [2022-01-18 17:44:35,919 INFO L226 Difference]: Without dead ends: 5369 [2022-01-18 17:44:35,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1126, Invalid=4130, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 17:44:35,920 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 476 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:35,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 425 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1566 Invalid, 0 Unknown, 269 Unchecked, 0.8s Time] [2022-01-18 17:44:35,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5369 states. [2022-01-18 17:44:35,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5369 to 2294. [2022-01-18 17:44:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 3.6240732664631485) internal successors, (8310), 2293 states have internal predecessors, (8310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:35,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 8310 transitions. [2022-01-18 17:44:35,968 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 8310 transitions. Word has length 26 [2022-01-18 17:44:35,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:35,968 INFO L470 AbstractCegarLoop]: Abstraction has 2294 states and 8310 transitions. [2022-01-18 17:44:35,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:35,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 8310 transitions. [2022-01-18 17:44:35,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:35,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:35,971 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] [2022-01-18 17:44:35,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:36,171 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 [2022-01-18 17:44:36,172 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:36,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash -705646396, now seen corresponding path program 17 times [2022-01-18 17:44:36,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:36,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644471054] [2022-01-18 17:44:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:36,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:36,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:36,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644471054] [2022-01-18 17:44:36,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644471054] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:36,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449447390] [2022-01-18 17:44:36,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:44:36,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:36,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:36,423 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) [2022-01-18 17:44:36,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 17:44:36,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:44:36,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:36,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 17:44:36,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:36,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:36,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:36,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-18 17:44:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:36,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:36,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:36,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:36,991 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 21 treesize of output 56 [2022-01-18 17:44:37,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:37,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:37,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:37,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:44:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:37,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449447390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:37,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:37,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 17:44:37,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790906431] [2022-01-18 17:44:37,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:37,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:44:37,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:37,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:44:37,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:44:37,444 INFO L87 Difference]: Start difference. First operand 2294 states and 8310 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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) [2022-01-18 17:44:42,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:42,182 INFO L93 Difference]: Finished difference Result 4714 states and 15312 transitions. [2022-01-18 17:44:42,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 17:44:42,182 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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 [2022-01-18 17:44:42,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:42,190 INFO L225 Difference]: With dead ends: 4714 [2022-01-18 17:44:42,190 INFO L226 Difference]: Without dead ends: 4651 [2022-01-18 17:44:42,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3164 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1261, Invalid=8639, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 17:44:42,192 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 467 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 2100 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:42,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 549 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2100 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 17:44:42,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2022-01-18 17:44:42,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 2420. [2022-01-18 17:44:42,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2419 states have (on average 3.6143034311699047) internal successors, (8743), 2419 states have internal predecessors, (8743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 8743 transitions. [2022-01-18 17:44:42,235 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 8743 transitions. Word has length 26 [2022-01-18 17:44:42,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:42,235 INFO L470 AbstractCegarLoop]: Abstraction has 2420 states and 8743 transitions. [2022-01-18 17:44:42,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 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) [2022-01-18 17:44:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 8743 transitions. [2022-01-18 17:44:42,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:42,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:42,239 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] [2022-01-18 17:44:42,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 17:44:42,439 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 [2022-01-18 17:44:42,439 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:42,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:42,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1190773488, now seen corresponding path program 18 times [2022-01-18 17:44:42,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:42,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720653064] [2022-01-18 17:44:42,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:42,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:42,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:42,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720653064] [2022-01-18 17:44:42,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720653064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:42,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451538732] [2022-01-18 17:44:42,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:44:42,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:42,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:42,712 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) [2022-01-18 17:44:42,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 17:44:42,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:44:42,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:42,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:44:42,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:43,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:43,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:43,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-01-18 17:44:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:43,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:43,362 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:44:43,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:44:43,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:43,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:43,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:43,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:44:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:43,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451538732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:43,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:43,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:44:43,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114277330] [2022-01-18 17:44:43,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:43,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:44:43,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:43,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:44:43,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:44:43,726 INFO L87 Difference]: Start difference. First operand 2420 states and 8743 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2022-01-18 17:44:46,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:46,508 INFO L93 Difference]: Finished difference Result 4407 states and 14743 transitions. [2022-01-18 17:44:46,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:44:46,508 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:44:46,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:46,517 INFO L225 Difference]: With dead ends: 4407 [2022-01-18 17:44:46,517 INFO L226 Difference]: Without dead ends: 4377 [2022-01-18 17:44:46,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=663, Invalid=4307, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 17:44:46,517 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 274 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:46,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 467 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2190 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 17:44:46,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4377 states. [2022-01-18 17:44:46,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4377 to 2375. [2022-01-18 17:44:46,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2375 states, 2374 states have (on average 3.608677337826453) internal successors, (8567), 2374 states have internal predecessors, (8567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 8567 transitions. [2022-01-18 17:44:46,563 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 8567 transitions. Word has length 26 [2022-01-18 17:44:46,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:46,563 INFO L470 AbstractCegarLoop]: Abstraction has 2375 states and 8567 transitions. [2022-01-18 17:44:46,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2022-01-18 17:44:46,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 8567 transitions. [2022-01-18 17:44:46,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:46,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:46,567 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] [2022-01-18 17:44:46,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:46,771 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 [2022-01-18 17:44:46,771 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:46,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:46,771 INFO L85 PathProgramCache]: Analyzing trace with hash -376486824, now seen corresponding path program 19 times [2022-01-18 17:44:46,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:46,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809304280] [2022-01-18 17:44:46,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:46,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:46,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:46,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809304280] [2022-01-18 17:44:46,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809304280] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:46,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284811083] [2022-01-18 17:44:46,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:44:46,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:47,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:47,000 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) [2022-01-18 17:44:47,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 17:44:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:47,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:44:47,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:47,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:47,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:47,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-18 17:44:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:47,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:47,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:47,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:47,515 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 21 treesize of output 56 [2022-01-18 17:44:47,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:47,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:47,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:47,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:44:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:47,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284811083] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:47,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:47,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:44:47,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736306534] [2022-01-18 17:44:47,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:47,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:44:47,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:47,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:44:47,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:44:47,893 INFO L87 Difference]: Start difference. First operand 2375 states and 8567 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:50,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:50,100 INFO L93 Difference]: Finished difference Result 4514 states and 14946 transitions. [2022-01-18 17:44:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 17:44:50,100 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:44:50,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:50,108 INFO L225 Difference]: With dead ends: 4514 [2022-01-18 17:44:50,108 INFO L226 Difference]: Without dead ends: 4451 [2022-01-18 17:44:50,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=686, Invalid=3096, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:44:50,109 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 414 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:50,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 289 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:44:50,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2022-01-18 17:44:50,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 2441. [2022-01-18 17:44:50,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.6176229508196722) internal successors, (8827), 2440 states have internal predecessors, (8827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 8827 transitions. [2022-01-18 17:44:50,153 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 8827 transitions. Word has length 26 [2022-01-18 17:44:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:50,153 INFO L470 AbstractCegarLoop]: Abstraction has 2441 states and 8827 transitions. [2022-01-18 17:44:50,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 8827 transitions. [2022-01-18 17:44:50,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:50,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:50,157 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] [2022-01-18 17:44:50,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:50,358 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 [2022-01-18 17:44:50,358 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:50,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:50,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1635493100, now seen corresponding path program 20 times [2022-01-18 17:44:50,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:50,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371143790] [2022-01-18 17:44:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:50,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:50,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:50,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371143790] [2022-01-18 17:44:50,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371143790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:50,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705860519] [2022-01-18 17:44:50,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:44:50,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:50,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:50,580 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) [2022-01-18 17:44:50,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 17:44:50,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:44:50,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:50,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:44:50,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:50,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:44:50,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:50,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-01-18 17:44:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:51,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:51,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:51,266 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 38 treesize of output 71 [2022-01-18 17:44:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:52,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705860519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:52,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:52,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:44:52,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109391245] [2022-01-18 17:44:52,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:52,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:44:52,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:52,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:44:52,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:44:52,206 INFO L87 Difference]: Start difference. First operand 2441 states and 8827 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:55,958 INFO L93 Difference]: Finished difference Result 5089 states and 16612 transitions. [2022-01-18 17:44:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 17:44:55,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:44:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:55,981 INFO L225 Difference]: With dead ends: 5089 [2022-01-18 17:44:55,981 INFO L226 Difference]: Without dead ends: 5021 [2022-01-18 17:44:55,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1091, Invalid=4311, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 17:44:55,982 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 486 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:55,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 417 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1090 Invalid, 0 Unknown, 519 Unchecked, 0.7s Time] [2022-01-18 17:44:56,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5021 states. [2022-01-18 17:44:56,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5021 to 2432. [2022-01-18 17:44:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 3.6199095022624435) internal successors, (8800), 2431 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:56,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 8800 transitions. [2022-01-18 17:44:56,062 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 8800 transitions. Word has length 26 [2022-01-18 17:44:56,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:56,064 INFO L470 AbstractCegarLoop]: Abstraction has 2432 states and 8800 transitions. [2022-01-18 17:44:56,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:56,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 8800 transitions. [2022-01-18 17:44:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:44:56,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:56,069 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] [2022-01-18 17:44:56,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-01-18 17:44:56,283 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 [2022-01-18 17:44:56,283 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:44:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash -913979680, now seen corresponding path program 21 times [2022-01-18 17:44:56,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:56,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734701540] [2022-01-18 17:44:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:56,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:56,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:56,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734701540] [2022-01-18 17:44:56,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734701540] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:56,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040547034] [2022-01-18 17:44:56,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:44:56,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:56,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:56,606 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) [2022-01-18 17:44:56,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 17:44:56,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:44:56,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:56,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 17:44:56,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:57,065 INFO L353 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2022-01-18 17:44:57,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 77 [2022-01-18 17:44:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:57,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:57,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:57,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:57,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:44:57,488 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 21 treesize of output 48 [2022-01-18 17:44:57,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:44:57,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-01-18 17:44:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:57,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040547034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:57,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:57,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2022-01-18 17:44:57,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885084222] [2022-01-18 17:44:57,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:57,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:44:57,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:57,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:44:57,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:44:57,719 INFO L87 Difference]: Start difference. First operand 2432 states and 8800 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:00,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:00,917 INFO L93 Difference]: Finished difference Result 4523 states and 15293 transitions. [2022-01-18 17:45:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:45:00,917 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:00,928 INFO L225 Difference]: With dead ends: 4523 [2022-01-18 17:45:00,928 INFO L226 Difference]: Without dead ends: 4460 [2022-01-18 17:45:00,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=739, Invalid=3817, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:45:00,929 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 371 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:00,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 333 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:45:00,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2022-01-18 17:45:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 2477. [2022-01-18 17:45:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 3.6163166397415187) internal successors, (8954), 2476 states have internal predecessors, (8954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 8954 transitions. [2022-01-18 17:45:00,987 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 8954 transitions. Word has length 26 [2022-01-18 17:45:00,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:00,987 INFO L470 AbstractCegarLoop]: Abstraction has 2477 states and 8954 transitions. [2022-01-18 17:45:00,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:00,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 8954 transitions. [2022-01-18 17:45:00,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:00,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:00,990 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] [2022-01-18 17:45:01,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 17:45:01,190 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 [2022-01-18 17:45:01,191 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:01,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:01,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2121981340, now seen corresponding path program 22 times [2022-01-18 17:45:01,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:01,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097723212] [2022-01-18 17:45:01,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:01,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:01,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:01,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097723212] [2022-01-18 17:45:01,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097723212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:01,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406864889] [2022-01-18 17:45:01,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:45:01,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:01,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:01,428 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) [2022-01-18 17:45:01,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 17:45:01,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:45:01,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:01,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:45:01,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:01,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:01,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:01,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-01-18 17:45:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:01,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:01,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:01,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:01,930 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 21 treesize of output 56 [2022-01-18 17:45:02,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:02,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:02,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:02,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:45:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:02,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406864889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:02,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:02,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:45:02,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738506297] [2022-01-18 17:45:02,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:02,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:45:02,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:02,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:45:02,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:45:02,299 INFO L87 Difference]: Start difference. First operand 2477 states and 8954 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:05,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:05,320 INFO L93 Difference]: Finished difference Result 5345 states and 17184 transitions. [2022-01-18 17:45:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 17:45:05,320 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:05,331 INFO L225 Difference]: With dead ends: 5345 [2022-01-18 17:45:05,331 INFO L226 Difference]: Without dead ends: 5214 [2022-01-18 17:45:05,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1792 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1064, Invalid=4486, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 17:45:05,332 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 404 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:05,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 440 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1740 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:45:05,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5214 states. [2022-01-18 17:45:05,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5214 to 2604. [2022-01-18 17:45:05,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 2603 states have (on average 3.606607760276604) internal successors, (9388), 2603 states have internal predecessors, (9388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:05,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 9388 transitions. [2022-01-18 17:45:05,404 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 9388 transitions. Word has length 26 [2022-01-18 17:45:05,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:05,405 INFO L470 AbstractCegarLoop]: Abstraction has 2604 states and 9388 transitions. [2022-01-18 17:45:05,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:05,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 9388 transitions. [2022-01-18 17:45:05,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:05,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:05,408 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] [2022-01-18 17:45:05,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 17:45:05,620 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 [2022-01-18 17:45:05,620 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:05,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:05,621 INFO L85 PathProgramCache]: Analyzing trace with hash 193303520, now seen corresponding path program 23 times [2022-01-18 17:45:05,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:05,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128721704] [2022-01-18 17:45:05,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:05,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:05,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:05,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128721704] [2022-01-18 17:45:05,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128721704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:05,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576531688] [2022-01-18 17:45:05,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:45:05,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:05,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:05,825 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) [2022-01-18 17:45:05,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 17:45:05,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:45:05,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:05,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:45:05,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:06,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:06,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:06,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-18 17:45:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:06,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:06,334 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:45:06,334 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 20 treesize of output 55 [2022-01-18 17:45:06,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:06,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:06,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:06,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:45:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:06,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576531688] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:06,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:06,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 17:45:06,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767232452] [2022-01-18 17:45:06,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:06,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:45:06,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:06,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:45:06,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:45:06,725 INFO L87 Difference]: Start difference. First operand 2604 states and 9388 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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) [2022-01-18 17:45:07,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:07,670 INFO L93 Difference]: Finished difference Result 3796 states and 12810 transitions. [2022-01-18 17:45:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 17:45:07,671 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 [2022-01-18 17:45:07,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:07,678 INFO L225 Difference]: With dead ends: 3796 [2022-01-18 17:45:07,678 INFO L226 Difference]: Without dead ends: 3766 [2022-01-18 17:45:07,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:45:07,678 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 149 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:07,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 243 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1086 Invalid, 0 Unknown, 68 Unchecked, 0.5s Time] [2022-01-18 17:45:07,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2022-01-18 17:45:07,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 2614. [2022-01-18 17:45:07,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2614 states, 2613 states have (on average 3.6069651741293534) internal successors, (9425), 2613 states have internal predecessors, (9425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:07,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 9425 transitions. [2022-01-18 17:45:07,720 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 9425 transitions. Word has length 26 [2022-01-18 17:45:07,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:07,720 INFO L470 AbstractCegarLoop]: Abstraction has 2614 states and 9425 transitions. [2022-01-18 17:45:07,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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) [2022-01-18 17:45:07,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 9425 transitions. [2022-01-18 17:45:07,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:07,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:07,723 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] [2022-01-18 17:45:07,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:07,924 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 [2022-01-18 17:45:07,924 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:07,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:07,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1764129120, now seen corresponding path program 24 times [2022-01-18 17:45:07,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:07,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353737698] [2022-01-18 17:45:07,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:07,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:08,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:08,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353737698] [2022-01-18 17:45:08,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353737698] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:08,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063832689] [2022-01-18 17:45:08,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:45:08,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:08,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:08,150 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) [2022-01-18 17:45:08,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 17:45:08,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:45:08,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:08,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:45:08,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:08,408 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-01-18 17:45:08,408 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 63 [2022-01-18 17:45:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:08,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:08,687 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:45:08,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:45:08,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:08,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:08,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:08,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:45:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:09,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063832689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:09,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:09,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:45:09,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830479260] [2022-01-18 17:45:09,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:09,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:45:09,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:09,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:45:09,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:45:09,054 INFO L87 Difference]: Start difference. First operand 2614 states and 9425 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:11,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:11,522 INFO L93 Difference]: Finished difference Result 4986 states and 16584 transitions. [2022-01-18 17:45:11,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 17:45:11,523 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:11,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:11,531 INFO L225 Difference]: With dead ends: 4986 [2022-01-18 17:45:11,531 INFO L226 Difference]: Without dead ends: 4891 [2022-01-18 17:45:11,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=788, Invalid=4468, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 17:45:11,532 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 380 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:11,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 310 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:45:11,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2022-01-18 17:45:11,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 2627. [2022-01-18 17:45:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 3.6085300837776084) internal successors, (9476), 2626 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:11,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 9476 transitions. [2022-01-18 17:45:11,584 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 9476 transitions. Word has length 26 [2022-01-18 17:45:11,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:11,584 INFO L470 AbstractCegarLoop]: Abstraction has 2627 states and 9476 transitions. [2022-01-18 17:45:11,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:11,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 9476 transitions. [2022-01-18 17:45:11,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:11,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:11,587 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] [2022-01-18 17:45:11,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-18 17:45:11,788 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 [2022-01-18 17:45:11,788 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:11,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:11,788 INFO L85 PathProgramCache]: Analyzing trace with hash -340731392, now seen corresponding path program 25 times [2022-01-18 17:45:11,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:11,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972880048] [2022-01-18 17:45:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:11,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:12,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:12,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972880048] [2022-01-18 17:45:12,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972880048] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:12,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274734589] [2022-01-18 17:45:12,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:45:12,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:12,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:12,072 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) [2022-01-18 17:45:12,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 17:45:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:12,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:45:12,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:12,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:12,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:12,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-18 17:45:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:12,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:12,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:12,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:12,720 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 21 treesize of output 56 [2022-01-18 17:45:12,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:12,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:12,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:12,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:45:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:13,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274734589] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:13,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:13,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:45:13,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723622132] [2022-01-18 17:45:13,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:13,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:45:13,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:13,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:45:13,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:45:13,094 INFO L87 Difference]: Start difference. First operand 2627 states and 9476 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:14,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:14,692 INFO L93 Difference]: Finished difference Result 4453 states and 14888 transitions. [2022-01-18 17:45:14,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:45:14,693 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:14,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:14,700 INFO L225 Difference]: With dead ends: 4453 [2022-01-18 17:45:14,701 INFO L226 Difference]: Without dead ends: 4413 [2022-01-18 17:45:14,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 17:45:14,701 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 342 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:14,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 236 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 716 Invalid, 0 Unknown, 176 Unchecked, 0.4s Time] [2022-01-18 17:45:14,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4413 states. [2022-01-18 17:45:14,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4413 to 2673. [2022-01-18 17:45:14,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2673 states, 2672 states have (on average 3.6096556886227544) internal successors, (9645), 2672 states have internal predecessors, (9645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2673 states to 2673 states and 9645 transitions. [2022-01-18 17:45:14,748 INFO L78 Accepts]: Start accepts. Automaton has 2673 states and 9645 transitions. Word has length 26 [2022-01-18 17:45:14,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:14,748 INFO L470 AbstractCegarLoop]: Abstraction has 2673 states and 9645 transitions. [2022-01-18 17:45:14,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:14,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2673 states and 9645 transitions. [2022-01-18 17:45:14,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:14,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:14,752 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] [2022-01-18 17:45:14,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:14,953 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 [2022-01-18 17:45:14,953 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:14,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:14,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1958264172, now seen corresponding path program 26 times [2022-01-18 17:45:14,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:14,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692199843] [2022-01-18 17:45:14,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:14,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:15,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:15,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692199843] [2022-01-18 17:45:15,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692199843] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:15,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631069074] [2022-01-18 17:45:15,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:45:15,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:15,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:15,154 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) [2022-01-18 17:45:15,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 17:45:15,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:45:15,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:15,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:45:15,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:15,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:15,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:15,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-01-18 17:45:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:15,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:15,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:15,760 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 38 treesize of output 71 [2022-01-18 17:45:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:16,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631069074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:16,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:16,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:45:16,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364580076] [2022-01-18 17:45:16,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:16,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:45:16,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:16,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:45:16,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:45:16,607 INFO L87 Difference]: Start difference. First operand 2673 states and 9645 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:20,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:20,005 INFO L93 Difference]: Finished difference Result 4963 states and 16602 transitions. [2022-01-18 17:45:20,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 17:45:20,005 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:20,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:20,014 INFO L225 Difference]: With dead ends: 4963 [2022-01-18 17:45:20,014 INFO L226 Difference]: Without dead ends: 4919 [2022-01-18 17:45:20,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1193, Invalid=4659, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 17:45:20,015 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 473 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:20,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 303 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 916 Invalid, 0 Unknown, 173 Unchecked, 0.6s Time] [2022-01-18 17:45:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4919 states. [2022-01-18 17:45:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4919 to 2690. [2022-01-18 17:45:20,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2690 states, 2689 states have (on average 3.6106359241353663) internal successors, (9709), 2689 states have internal predecessors, (9709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:20,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 9709 transitions. [2022-01-18 17:45:20,093 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 9709 transitions. Word has length 26 [2022-01-18 17:45:20,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:20,093 INFO L470 AbstractCegarLoop]: Abstraction has 2690 states and 9709 transitions. [2022-01-18 17:45:20,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:20,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 9709 transitions. [2022-01-18 17:45:20,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:20,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:20,098 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] [2022-01-18 17:45:20,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:20,319 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 [2022-01-18 17:45:20,319 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:20,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:20,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1158422128, now seen corresponding path program 27 times [2022-01-18 17:45:20,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:20,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948278262] [2022-01-18 17:45:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:20,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:20,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:20,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948278262] [2022-01-18 17:45:20,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948278262] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:20,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057500781] [2022-01-18 17:45:20,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:45:20,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:20,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:20,552 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) [2022-01-18 17:45:20,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 17:45:20,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:45:20,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:20,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:45:20,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:20,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:20,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:20,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 17:45:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:20,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:21,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:21,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:21,080 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 21 treesize of output 56 [2022-01-18 17:45:21,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:21,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:21,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:21,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:45:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:21,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057500781] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:21,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:21,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:45:21,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972382423] [2022-01-18 17:45:21,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:21,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:45:21,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:21,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:45:21,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:45:21,691 INFO L87 Difference]: Start difference. First operand 2690 states and 9709 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:24,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:24,423 INFO L93 Difference]: Finished difference Result 5009 states and 16652 transitions. [2022-01-18 17:45:24,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:45:24,423 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:24,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:24,432 INFO L225 Difference]: With dead ends: 5009 [2022-01-18 17:45:24,432 INFO L226 Difference]: Without dead ends: 4969 [2022-01-18 17:45:24,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=964, Invalid=3728, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:45:24,433 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 414 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:24,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 332 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1016 Invalid, 0 Unknown, 167 Unchecked, 0.6s Time] [2022-01-18 17:45:24,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4969 states. [2022-01-18 17:45:24,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4969 to 2690. [2022-01-18 17:45:24,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2690 states, 2689 states have (on average 3.611751580513202) internal successors, (9712), 2689 states have internal predecessors, (9712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 9712 transitions. [2022-01-18 17:45:24,487 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 9712 transitions. Word has length 26 [2022-01-18 17:45:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:24,487 INFO L470 AbstractCegarLoop]: Abstraction has 2690 states and 9712 transitions. [2022-01-18 17:45:24,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 9712 transitions. [2022-01-18 17:45:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:24,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:24,491 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] [2022-01-18 17:45:24,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:24,692 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 [2022-01-18 17:45:24,692 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:24,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:24,692 INFO L85 PathProgramCache]: Analyzing trace with hash 646760220, now seen corresponding path program 28 times [2022-01-18 17:45:24,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:24,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745241237] [2022-01-18 17:45:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:24,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:24,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:24,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745241237] [2022-01-18 17:45:24,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745241237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:24,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412705623] [2022-01-18 17:45:24,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:45:24,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:24,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:24,886 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) [2022-01-18 17:45:24,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 17:45:24,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:45:24,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:24,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:45:24,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:25,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:25,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:25,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-01-18 17:45:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:25,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:25,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:25,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:25,428 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 20 treesize of output 55 [2022-01-18 17:45:25,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:25,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:25,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:25,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:45:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:25,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412705623] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:25,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:25,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 17:45:25,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050220710] [2022-01-18 17:45:25,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:25,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:45:25,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:25,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:45:25,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:45:25,813 INFO L87 Difference]: Start difference. First operand 2690 states and 9712 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:27,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:27,524 INFO L93 Difference]: Finished difference Result 4644 states and 15587 transitions. [2022-01-18 17:45:27,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:45:27,524 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:27,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:27,532 INFO L225 Difference]: With dead ends: 4644 [2022-01-18 17:45:27,532 INFO L226 Difference]: Without dead ends: 4579 [2022-01-18 17:45:27,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=672, Invalid=2750, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 17:45:27,533 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 429 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:27,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 246 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 873 Invalid, 0 Unknown, 115 Unchecked, 0.5s Time] [2022-01-18 17:45:27,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2022-01-18 17:45:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 2697. [2022-01-18 17:45:27,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 2696 states have (on average 3.615727002967359) internal successors, (9748), 2696 states have internal predecessors, (9748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 9748 transitions. [2022-01-18 17:45:27,582 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 9748 transitions. Word has length 26 [2022-01-18 17:45:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:27,582 INFO L470 AbstractCegarLoop]: Abstraction has 2697 states and 9748 transitions. [2022-01-18 17:45:27,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:27,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 9748 transitions. [2022-01-18 17:45:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:27,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:27,586 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] [2022-01-18 17:45:27,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:27,786 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 [2022-01-18 17:45:27,786 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:27,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:27,786 INFO L85 PathProgramCache]: Analyzing trace with hash -599960430, now seen corresponding path program 29 times [2022-01-18 17:45:27,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:27,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541798653] [2022-01-18 17:45:27,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:27,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:28,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:28,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541798653] [2022-01-18 17:45:28,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541798653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:28,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174449846] [2022-01-18 17:45:28,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:45:28,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:28,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:28,023 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) [2022-01-18 17:45:28,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 17:45:28,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:45:28,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:28,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:45:28,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:28,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:28,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:28,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-18 17:45:28,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:28,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:28,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:28,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-18 17:45:28,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 6 [2022-01-18 17:45:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:28,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174449846] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:28,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:28,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2022-01-18 17:45:28,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986110287] [2022-01-18 17:45:28,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:28,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:45:28,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:28,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:45:28,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:45:28,700 INFO L87 Difference]: Start difference. First operand 2697 states and 9748 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:30,108 INFO L93 Difference]: Finished difference Result 4289 states and 14868 transitions. [2022-01-18 17:45:30,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:45:30,108 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:30,116 INFO L225 Difference]: With dead ends: 4289 [2022-01-18 17:45:30,117 INFO L226 Difference]: Without dead ends: 4267 [2022-01-18 17:45:30,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=589, Invalid=2833, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 17:45:30,117 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 241 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 684 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:30,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 299 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 763 Invalid, 0 Unknown, 684 Unchecked, 0.4s Time] [2022-01-18 17:45:30,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4267 states. [2022-01-18 17:45:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4267 to 2721. [2022-01-18 17:45:30,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 2720 states have (on average 3.6121323529411766) internal successors, (9825), 2720 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 9825 transitions. [2022-01-18 17:45:30,163 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 9825 transitions. Word has length 26 [2022-01-18 17:45:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:30,163 INFO L470 AbstractCegarLoop]: Abstraction has 2721 states and 9825 transitions. [2022-01-18 17:45:30,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:30,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 9825 transitions. [2022-01-18 17:45:30,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:30,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:30,167 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] [2022-01-18 17:45:30,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:30,383 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 [2022-01-18 17:45:30,383 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:30,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash 179145086, now seen corresponding path program 30 times [2022-01-18 17:45:30,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:30,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543207124] [2022-01-18 17:45:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:30,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:30,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:30,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543207124] [2022-01-18 17:45:30,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543207124] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:30,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692375169] [2022-01-18 17:45:30,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:45:30,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:30,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:30,600 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) [2022-01-18 17:45:30,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 17:45:30,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:45:30,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:30,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:45:30,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:30,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:30,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:30,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-01-18 17:45:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:30,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:31,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:31,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:31,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:45:31,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:31,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:31,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:31,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:45:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:31,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692375169] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:31,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:31,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:45:31,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262355228] [2022-01-18 17:45:31,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:31,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:45:31,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:31,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:45:31,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:45:31,524 INFO L87 Difference]: Start difference. First operand 2721 states and 9825 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:33,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:33,829 INFO L93 Difference]: Finished difference Result 5079 states and 16896 transitions. [2022-01-18 17:45:33,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:45:33,829 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:33,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:33,838 INFO L225 Difference]: With dead ends: 5079 [2022-01-18 17:45:33,838 INFO L226 Difference]: Without dead ends: 5064 [2022-01-18 17:45:33,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1584 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=961, Invalid=3731, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:45:33,839 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 429 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:33,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 341 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 965 Invalid, 0 Unknown, 202 Unchecked, 0.5s Time] [2022-01-18 17:45:33,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2022-01-18 17:45:33,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 2727. [2022-01-18 17:45:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 3.611885546588408) internal successors, (9846), 2726 states have internal predecessors, (9846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:33,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 9846 transitions. [2022-01-18 17:45:33,905 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 9846 transitions. Word has length 26 [2022-01-18 17:45:33,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:33,905 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 9846 transitions. [2022-01-18 17:45:33,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:33,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 9846 transitions. [2022-01-18 17:45:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:33,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:33,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:33,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-18 17:45:34,109 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 [2022-01-18 17:45:34,109 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:34,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:34,110 INFO L85 PathProgramCache]: Analyzing trace with hash -706653194, now seen corresponding path program 31 times [2022-01-18 17:45:34,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:34,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968158605] [2022-01-18 17:45:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:34,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:34,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:34,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968158605] [2022-01-18 17:45:34,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968158605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:34,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117278403] [2022-01-18 17:45:34,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:45:34,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:34,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:34,320 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) [2022-01-18 17:45:34,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 17:45:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:34,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:45:34,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:34,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:34,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:34,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-01-18 17:45:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:34,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:34,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:34,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:34,887 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 20 treesize of output 55 [2022-01-18 17:45:35,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:35,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:35,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:35,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:45:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:35,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117278403] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:35,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:35,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 17:45:35,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865254380] [2022-01-18 17:45:35,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:35,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:45:35,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:35,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:45:35,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:45:35,265 INFO L87 Difference]: Start difference. First operand 2727 states and 9846 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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) [2022-01-18 17:45:37,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:37,011 INFO L93 Difference]: Finished difference Result 4598 states and 15470 transitions. [2022-01-18 17:45:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:45:37,011 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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 [2022-01-18 17:45:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:37,019 INFO L225 Difference]: With dead ends: 4598 [2022-01-18 17:45:37,019 INFO L226 Difference]: Without dead ends: 4562 [2022-01-18 17:45:37,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=707, Invalid=2953, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:45:37,020 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 350 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:37,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 332 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 789 Invalid, 0 Unknown, 226 Unchecked, 0.4s Time] [2022-01-18 17:45:37,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4562 states. [2022-01-18 17:45:37,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4562 to 2727. [2022-01-18 17:45:37,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 3.611885546588408) internal successors, (9846), 2726 states have internal predecessors, (9846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 9846 transitions. [2022-01-18 17:45:37,067 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 9846 transitions. Word has length 26 [2022-01-18 17:45:37,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:37,067 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 9846 transitions. [2022-01-18 17:45:37,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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) [2022-01-18 17:45:37,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 9846 transitions. [2022-01-18 17:45:37,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:37,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:37,071 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:37,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 17:45:37,271 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 [2022-01-18 17:45:37,272 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:37,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:37,272 INFO L85 PathProgramCache]: Analyzing trace with hash 902763630, now seen corresponding path program 37 times [2022-01-18 17:45:37,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:37,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174296474] [2022-01-18 17:45:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:37,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:37,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:37,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174296474] [2022-01-18 17:45:37,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174296474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:37,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517961557] [2022-01-18 17:45:37,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:45:37,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:37,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:37,525 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) [2022-01-18 17:45:37,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 17:45:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:37,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:45:37,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:37,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:37,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:37,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:37,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:37,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-01-18 17:45:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:37,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:37,972 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:45:37,972 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 47 [2022-01-18 17:45:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:38,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517961557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:38,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:38,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 17:45:38,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624810958] [2022-01-18 17:45:38,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:38,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:45:38,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:38,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:45:38,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:45:38,197 INFO L87 Difference]: Start difference. First operand 2727 states and 9846 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:39,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:39,975 INFO L93 Difference]: Finished difference Result 4463 states and 15278 transitions. [2022-01-18 17:45:39,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 17:45:39,976 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:39,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:39,984 INFO L225 Difference]: With dead ends: 4463 [2022-01-18 17:45:39,984 INFO L226 Difference]: Without dead ends: 4433 [2022-01-18 17:45:39,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=629, Invalid=3661, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 17:45:39,985 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 253 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:39,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 302 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:45:39,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4433 states. [2022-01-18 17:45:40,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4433 to 2753. [2022-01-18 17:45:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 3.6071947674418605) internal successors, (9927), 2752 states have internal predecessors, (9927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:40,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 9927 transitions. [2022-01-18 17:45:40,035 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 9927 transitions. Word has length 26 [2022-01-18 17:45:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:40,035 INFO L470 AbstractCegarLoop]: Abstraction has 2753 states and 9927 transitions. [2022-01-18 17:45:40,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:40,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 9927 transitions. [2022-01-18 17:45:40,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:40,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:40,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:40,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:40,255 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 [2022-01-18 17:45:40,255 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:40,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:40,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2020528988, now seen corresponding path program 38 times [2022-01-18 17:45:40,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:40,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887852495] [2022-01-18 17:45:40,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:40,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:40,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:40,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887852495] [2022-01-18 17:45:40,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887852495] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:40,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854667454] [2022-01-18 17:45:40,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:45:40,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:40,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:40,536 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) [2022-01-18 17:45:40,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 17:45:40,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:45:40,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:40,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 17:45:40,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:40,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:40,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:40,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:40,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:40,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 17:45:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:41,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:41,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:41,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:41,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:41,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:41,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:45:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:41,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854667454] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:41,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:41,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2022-01-18 17:45:41,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279895435] [2022-01-18 17:45:41,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:41,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 17:45:41,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:41,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 17:45:41,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:45:41,338 INFO L87 Difference]: Start difference. First operand 2753 states and 9927 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) [2022-01-18 17:45:43,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:43,923 INFO L93 Difference]: Finished difference Result 4917 states and 16637 transitions. [2022-01-18 17:45:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 17:45:43,924 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 26 [2022-01-18 17:45:43,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:43,933 INFO L225 Difference]: With dead ends: 4917 [2022-01-18 17:45:43,933 INFO L226 Difference]: Without dead ends: 4792 [2022-01-18 17:45:43,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=892, Invalid=5270, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 17:45:43,934 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 377 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:43,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 385 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1488 Invalid, 0 Unknown, 395 Unchecked, 0.7s Time] [2022-01-18 17:45:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4792 states. [2022-01-18 17:45:44,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4792 to 2837. [2022-01-18 17:45:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2837 states, 2836 states have (on average 3.597672778561354) internal successors, (10203), 2836 states have internal predecessors, (10203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 10203 transitions. [2022-01-18 17:45:44,011 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 10203 transitions. Word has length 26 [2022-01-18 17:45:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:44,011 INFO L470 AbstractCegarLoop]: Abstraction has 2837 states and 10203 transitions. [2022-01-18 17:45:44,011 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) [2022-01-18 17:45:44,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 10203 transitions. [2022-01-18 17:45:44,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:44,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:44,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:44,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:44,216 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 [2022-01-18 17:45:44,216 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:44,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:44,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1206563744, now seen corresponding path program 39 times [2022-01-18 17:45:44,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:44,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042160248] [2022-01-18 17:45:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:44,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:44,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:44,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042160248] [2022-01-18 17:45:44,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042160248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:44,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386302514] [2022-01-18 17:45:44,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:45:44,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:44,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:44,472 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) [2022-01-18 17:45:44,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 17:45:44,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:45:44,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:44,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:45:44,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:44,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:44,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:44,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:44,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 34 [2022-01-18 17:45:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:45,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:45,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:45,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:45,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:45,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 29 [2022-01-18 17:45:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:45,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386302514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:45,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:45,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-01-18 17:45:45,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128799990] [2022-01-18 17:45:45,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:45,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 17:45:45,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:45,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 17:45:45,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:45:45,543 INFO L87 Difference]: Start difference. First operand 2837 states and 10203 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 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) [2022-01-18 17:45:48,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:48,067 INFO L93 Difference]: Finished difference Result 4864 states and 16873 transitions. [2022-01-18 17:45:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 17:45:48,067 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 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 26 [2022-01-18 17:45:48,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:48,077 INFO L225 Difference]: With dead ends: 4864 [2022-01-18 17:45:48,077 INFO L226 Difference]: Without dead ends: 4834 [2022-01-18 17:45:48,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2205 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1018, Invalid=6292, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 17:45:48,078 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 282 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 788 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:48,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 521 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 898 Invalid, 0 Unknown, 788 Unchecked, 0.4s Time] [2022-01-18 17:45:48,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4834 states. [2022-01-18 17:45:48,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4834 to 2870. [2022-01-18 17:45:48,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2869 states have (on average 3.590449634018822) internal successors, (10301), 2869 states have internal predecessors, (10301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:48,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 10301 transitions. [2022-01-18 17:45:48,131 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 10301 transitions. Word has length 26 [2022-01-18 17:45:48,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:48,132 INFO L470 AbstractCegarLoop]: Abstraction has 2870 states and 10301 transitions. [2022-01-18 17:45:48,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 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) [2022-01-18 17:45:48,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 10301 transitions. [2022-01-18 17:45:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:48,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:48,136 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:48,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:48,336 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 [2022-01-18 17:45:48,336 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:48,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:48,337 INFO L85 PathProgramCache]: Analyzing trace with hash 267653912, now seen corresponding path program 40 times [2022-01-18 17:45:48,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:48,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601646834] [2022-01-18 17:45:48,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:48,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:48,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:48,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601646834] [2022-01-18 17:45:48,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601646834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:48,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774300414] [2022-01-18 17:45:48,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:45:48,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:48,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:48,575 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) [2022-01-18 17:45:48,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 17:45:48,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:45:48,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:48,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:45:48,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:48,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:48,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:48,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:48,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:48,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-01-18 17:45:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:48,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:49,021 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:45:49,022 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 47 [2022-01-18 17:45:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:49,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774300414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:49,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:49,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 17:45:49,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167130832] [2022-01-18 17:45:49,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:49,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:45:49,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:49,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:45:49,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:45:49,170 INFO L87 Difference]: Start difference. First operand 2870 states and 10301 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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) [2022-01-18 17:45:51,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:51,595 INFO L93 Difference]: Finished difference Result 4716 states and 15993 transitions. [2022-01-18 17:45:51,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 17:45:51,596 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:51,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:51,605 INFO L225 Difference]: With dead ends: 4716 [2022-01-18 17:45:51,605 INFO L226 Difference]: Without dead ends: 4686 [2022-01-18 17:45:51,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=800, Invalid=5206, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 17:45:51,606 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 243 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 1899 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 2049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:51,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 510 Invalid, 2049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1899 Invalid, 0 Unknown, 77 Unchecked, 0.8s Time] [2022-01-18 17:45:51,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2022-01-18 17:45:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 2898. [2022-01-18 17:45:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2898 states, 2897 states have (on average 3.5833620987228167) internal successors, (10381), 2897 states have internal predecessors, (10381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:51,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 10381 transitions. [2022-01-18 17:45:51,663 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 10381 transitions. Word has length 26 [2022-01-18 17:45:51,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:51,663 INFO L470 AbstractCegarLoop]: Abstraction has 2898 states and 10381 transitions. [2022-01-18 17:45:51,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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) [2022-01-18 17:45:51,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 10381 transitions. [2022-01-18 17:45:51,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:51,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:51,668 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] [2022-01-18 17:45:51,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-18 17:45:51,868 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 [2022-01-18 17:45:51,868 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:51,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:51,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1794939168, now seen corresponding path program 32 times [2022-01-18 17:45:51,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:51,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492767571] [2022-01-18 17:45:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:51,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:52,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:52,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492767571] [2022-01-18 17:45:52,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492767571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:52,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70159010] [2022-01-18 17:45:52,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:45:52,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:52,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:52,070 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) [2022-01-18 17:45:52,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 17:45:52,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:45:52,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:52,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:45:52,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:52,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:52,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:52,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-01-18 17:45:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:52,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:52,614 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:45:52,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:45:52,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:52,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:52,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:52,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:45:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:52,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70159010] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:52,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:52,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:45:52,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614519283] [2022-01-18 17:45:52,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:52,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:45:52,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:52,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:45:52,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:45:52,999 INFO L87 Difference]: Start difference. First operand 2898 states and 10381 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:57,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:57,306 INFO L93 Difference]: Finished difference Result 5777 states and 18905 transitions. [2022-01-18 17:45:57,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 17:45:57,306 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:45:57,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:57,335 INFO L225 Difference]: With dead ends: 5777 [2022-01-18 17:45:57,335 INFO L226 Difference]: Without dead ends: 5739 [2022-01-18 17:45:57,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2917 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1257, Invalid=7299, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 17:45:57,335 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 546 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:57,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 409 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:45:57,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5739 states. [2022-01-18 17:45:57,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5739 to 2916. [2022-01-18 17:45:57,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 3.585591766723842) internal successors, (10452), 2915 states have internal predecessors, (10452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:57,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 10452 transitions. [2022-01-18 17:45:57,402 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 10452 transitions. Word has length 26 [2022-01-18 17:45:57,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:57,403 INFO L470 AbstractCegarLoop]: Abstraction has 2916 states and 10452 transitions. [2022-01-18 17:45:57,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:57,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 10452 transitions. [2022-01-18 17:45:57,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:45:57,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:57,407 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:57,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-01-18 17:45:57,607 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 [2022-01-18 17:45:57,608 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:45:57,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:57,608 INFO L85 PathProgramCache]: Analyzing trace with hash -18564080, now seen corresponding path program 41 times [2022-01-18 17:45:57,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:57,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657761466] [2022-01-18 17:45:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:57,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:57,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:57,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657761466] [2022-01-18 17:45:57,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657761466] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:57,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507331726] [2022-01-18 17:45:57,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:45:57,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:57,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:57,835 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) [2022-01-18 17:45:57,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 17:45:57,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:45:57,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:57,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 17:45:57,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:58,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:58,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:58,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:45:58,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:58,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-01-18 17:45:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:58,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:58,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:58,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:58,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:45:58,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:45:58,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-18 17:45:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:45:58,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507331726] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:58,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:58,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-01-18 17:45:58,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682464446] [2022-01-18 17:45:58,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:58,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:45:58,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:58,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:45:58,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:45:58,353 INFO L87 Difference]: Start difference. First operand 2916 states and 10452 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 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) [2022-01-18 17:46:01,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:46:01,435 INFO L93 Difference]: Finished difference Result 5484 states and 18435 transitions. [2022-01-18 17:46:01,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 17:46:01,435 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:46:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:46:01,445 INFO L225 Difference]: With dead ends: 5484 [2022-01-18 17:46:01,446 INFO L226 Difference]: Without dead ends: 5385 [2022-01-18 17:46:01,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1130, Invalid=5350, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 17:46:01,446 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 442 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:46:01,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 511 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1579 Invalid, 0 Unknown, 302 Unchecked, 0.8s Time] [2022-01-18 17:46:01,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5385 states. [2022-01-18 17:46:01,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5385 to 3032. [2022-01-18 17:46:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 3031 states have (on average 3.5819861431870668) internal successors, (10857), 3031 states have internal predecessors, (10857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:01,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 10857 transitions. [2022-01-18 17:46:01,510 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 10857 transitions. Word has length 26 [2022-01-18 17:46:01,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:46:01,510 INFO L470 AbstractCegarLoop]: Abstraction has 3032 states and 10857 transitions. [2022-01-18 17:46:01,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 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) [2022-01-18 17:46:01,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 10857 transitions. [2022-01-18 17:46:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:46:01,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:46:01,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:46:01,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-01-18 17:46:01,715 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 [2022-01-18 17:46:01,715 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:46:01,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:46:01,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1815084572, now seen corresponding path program 42 times [2022-01-18 17:46:01,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:46:01,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333756413] [2022-01-18 17:46:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:46:01,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:46:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:46:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:01,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:46:01,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333756413] [2022-01-18 17:46:01,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333756413] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:46:01,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014698213] [2022-01-18 17:46:01,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:46:01,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:46:01,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:46:01,959 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) [2022-01-18 17:46:01,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 17:46:01,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:46:01,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:46:01,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 17:46:01,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:46:02,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:46:02,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:46:02,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:02,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 17:46:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:02,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:46:02,491 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:46:02,491 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 47 [2022-01-18 17:46:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:02,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014698213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:46:02,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:46:02,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 26 [2022-01-18 17:46:02,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342349258] [2022-01-18 17:46:02,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:46:02,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:46:02,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:46:02,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:46:02,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:46:02,620 INFO L87 Difference]: Start difference. First operand 3032 states and 10857 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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) [2022-01-18 17:46:11,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:46:11,391 INFO L93 Difference]: Finished difference Result 7691 states and 25281 transitions. [2022-01-18 17:46:11,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-18 17:46:11,392 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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 26 [2022-01-18 17:46:11,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:46:11,407 INFO L225 Difference]: With dead ends: 7691 [2022-01-18 17:46:11,408 INFO L226 Difference]: Without dead ends: 7579 [2022-01-18 17:46:11,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11219 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=4357, Invalid=23365, Unknown=0, NotChecked=0, Total=27722 [2022-01-18 17:46:11,410 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 637 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 2490 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 2648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:46:11,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 720 Invalid, 2648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2490 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 17:46:11,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7579 states. [2022-01-18 17:46:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7579 to 3071. [2022-01-18 17:46:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3071 states, 3070 states have (on average 3.585342019543974) internal successors, (11007), 3070 states have internal predecessors, (11007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:11,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3071 states to 3071 states and 11007 transitions. [2022-01-18 17:46:11,510 INFO L78 Accepts]: Start accepts. Automaton has 3071 states and 11007 transitions. Word has length 26 [2022-01-18 17:46:11,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:46:11,510 INFO L470 AbstractCegarLoop]: Abstraction has 3071 states and 11007 transitions. [2022-01-18 17:46:11,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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) [2022-01-18 17:46:11,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3071 states and 11007 transitions. [2022-01-18 17:46:11,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:46:11,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:46:11,515 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] [2022-01-18 17:46:11,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-01-18 17:46:11,715 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 [2022-01-18 17:46:11,715 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:46:11,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:46:11,716 INFO L85 PathProgramCache]: Analyzing trace with hash -629380028, now seen corresponding path program 33 times [2022-01-18 17:46:11,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:46:11,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018188497] [2022-01-18 17:46:11,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:46:11,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:46:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:46:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:11,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:46:11,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018188497] [2022-01-18 17:46:11,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018188497] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:46:11,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090245581] [2022-01-18 17:46:11,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:46:11,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:46:11,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:46:11,936 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) [2022-01-18 17:46:11,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 17:46:11,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:46:11,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:46:11,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:46:11,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:46:12,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:12,334 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 22 treesize of output 38 [2022-01-18 17:46:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:12,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:46:12,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:12,966 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 38 treesize of output 71 [2022-01-18 17:46:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:13,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090245581] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:46:13,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:46:13,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-01-18 17:46:13,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279179759] [2022-01-18 17:46:13,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:46:13,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:46:13,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:46:13,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:46:13,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:46:13,598 INFO L87 Difference]: Start difference. First operand 3071 states and 11007 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:46:16,071 INFO L93 Difference]: Finished difference Result 5427 states and 18637 transitions. [2022-01-18 17:46:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 17:46:16,071 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:46:16,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:46:16,082 INFO L225 Difference]: With dead ends: 5427 [2022-01-18 17:46:16,082 INFO L226 Difference]: Without dead ends: 5383 [2022-01-18 17:46:16,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=843, Invalid=3987, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 17:46:16,083 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 256 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 910 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:46:16,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 440 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1012 Invalid, 0 Unknown, 910 Unchecked, 0.6s Time] [2022-01-18 17:46:16,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5383 states. [2022-01-18 17:46:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5383 to 3067. [2022-01-18 17:46:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3067 states, 3066 states have (on average 3.5848010437051534) internal successors, (10991), 3066 states have internal predecessors, (10991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:16,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3067 states to 3067 states and 10991 transitions. [2022-01-18 17:46:16,150 INFO L78 Accepts]: Start accepts. Automaton has 3067 states and 10991 transitions. Word has length 26 [2022-01-18 17:46:16,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:46:16,150 INFO L470 AbstractCegarLoop]: Abstraction has 3067 states and 10991 transitions. [2022-01-18 17:46:16,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:16,150 INFO L276 IsEmpty]: Start isEmpty. Operand 3067 states and 10991 transitions. [2022-01-18 17:46:16,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:46:16,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:46:16,155 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] [2022-01-18 17:46:16,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-18 17:46:16,355 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 [2022-01-18 17:46:16,355 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:46:16,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:46:16,356 INFO L85 PathProgramCache]: Analyzing trace with hash 2048054488, now seen corresponding path program 34 times [2022-01-18 17:46:16,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:46:16,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736066785] [2022-01-18 17:46:16,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:46:16,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:46:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:46:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:16,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:46:16,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736066785] [2022-01-18 17:46:16,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736066785] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:46:16,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455917326] [2022-01-18 17:46:16,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:46:16,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:46:16,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:46:16,535 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) [2022-01-18 17:46:16,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 17:46:16,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:46:16,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:46:16,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:46:16,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:46:16,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:46:16,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:16,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:46:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:16,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:46:17,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:17,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:17,057 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 21 treesize of output 56 [2022-01-18 17:46:17,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:17,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:17,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:17,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:46:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:17,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455917326] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:46:17,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:46:17,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:46:17,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962993112] [2022-01-18 17:46:17,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:46:17,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:46:17,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:46:17,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:46:17,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:46:17,387 INFO L87 Difference]: Start difference. First operand 3067 states and 10991 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:20,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:46:20,033 INFO L93 Difference]: Finished difference Result 6031 states and 19876 transitions. [2022-01-18 17:46:20,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 17:46:20,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:46:20,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:46:20,044 INFO L225 Difference]: With dead ends: 6031 [2022-01-18 17:46:20,044 INFO L226 Difference]: Without dead ends: 5977 [2022-01-18 17:46:20,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1154, Invalid=4396, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 17:46:20,045 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 559 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:46:20,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 403 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1182 Invalid, 0 Unknown, 280 Unchecked, 0.7s Time] [2022-01-18 17:46:20,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5977 states. [2022-01-18 17:46:20,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5977 to 3113. [2022-01-18 17:46:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3113 states, 3112 states have (on average 3.581298200514139) internal successors, (11145), 3112 states have internal predecessors, (11145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 11145 transitions. [2022-01-18 17:46:20,111 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 11145 transitions. Word has length 26 [2022-01-18 17:46:20,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:46:20,112 INFO L470 AbstractCegarLoop]: Abstraction has 3113 states and 11145 transitions. [2022-01-18 17:46:20,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:20,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 11145 transitions. [2022-01-18 17:46:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:46:20,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:46:20,116 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] [2022-01-18 17:46:20,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-01-18 17:46:20,317 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 [2022-01-18 17:46:20,317 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:46:20,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:46:20,317 INFO L85 PathProgramCache]: Analyzing trace with hash 358111584, now seen corresponding path program 35 times [2022-01-18 17:46:20,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:46:20,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429776779] [2022-01-18 17:46:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:46:20,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:46:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:46:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:20,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:46:20,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429776779] [2022-01-18 17:46:20,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429776779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:46:20,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468444849] [2022-01-18 17:46:20,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:46:20,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:46:20,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:46:20,516 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) [2022-01-18 17:46:20,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 17:46:20,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:46:20,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:46:20,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:46:20,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:46:20,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:46:20,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:20,804 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 20 treesize of output 28 [2022-01-18 17:46:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:20,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:46:21,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:21,107 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 37 treesize of output 70 [2022-01-18 17:46:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:21,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468444849] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:46:21,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:46:21,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 17:46:21,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683018745] [2022-01-18 17:46:21,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:46:21,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:46:21,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:46:21,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:46:21,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:46:21,899 INFO L87 Difference]: Start difference. First operand 3113 states and 11145 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:46:24,786 INFO L93 Difference]: Finished difference Result 5565 states and 18570 transitions. [2022-01-18 17:46:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 17:46:24,786 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:46:24,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:46:24,797 INFO L225 Difference]: With dead ends: 5565 [2022-01-18 17:46:24,797 INFO L226 Difference]: Without dead ends: 5515 [2022-01-18 17:46:24,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1111, Invalid=4439, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 17:46:24,798 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 445 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:46:24,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 345 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 911 Invalid, 0 Unknown, 213 Unchecked, 0.5s Time] [2022-01-18 17:46:24,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5515 states. [2022-01-18 17:46:24,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5515 to 3125. [2022-01-18 17:46:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 3124 states have (on average 3.5848271446862996) internal successors, (11199), 3124 states have internal predecessors, (11199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:24,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 11199 transitions. [2022-01-18 17:46:24,866 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 11199 transitions. Word has length 26 [2022-01-18 17:46:24,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:46:24,866 INFO L470 AbstractCegarLoop]: Abstraction has 3125 states and 11199 transitions. [2022-01-18 17:46:24,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:24,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 11199 transitions. [2022-01-18 17:46:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:46:24,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:46:24,871 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] [2022-01-18 17:46:24,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-01-18 17:46:25,071 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 [2022-01-18 17:46:25,072 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:46:25,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:46:25,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1865146436, now seen corresponding path program 36 times [2022-01-18 17:46:25,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:46:25,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457815930] [2022-01-18 17:46:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:46:25,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:46:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:46:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:25,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:46:25,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457815930] [2022-01-18 17:46:25,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457815930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:46:25,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035810642] [2022-01-18 17:46:25,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:46:25,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:46:25,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:46:25,263 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) [2022-01-18 17:46:25,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 17:46:25,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:46:25,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:46:25,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:46:25,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:46:25,575 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-01-18 17:46:25,575 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2022-01-18 17:46:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:25,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:46:25,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:25,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:25,839 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 21 treesize of output 56 [2022-01-18 17:46:25,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:25,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:26,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:26,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:46:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:26,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035810642] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:46:26,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:46:26,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-01-18 17:46:26,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395479765] [2022-01-18 17:46:26,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:46:26,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:46:26,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:46:26,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:46:26,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:46:26,241 INFO L87 Difference]: Start difference. First operand 3125 states and 11199 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 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) [2022-01-18 17:46:27,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:46:27,922 INFO L93 Difference]: Finished difference Result 5173 states and 17270 transitions. [2022-01-18 17:46:27,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:46:27,922 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:46:27,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:46:27,932 INFO L225 Difference]: With dead ends: 5173 [2022-01-18 17:46:27,933 INFO L226 Difference]: Without dead ends: 5158 [2022-01-18 17:46:27,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=585, Invalid=2837, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 17:46:27,933 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 301 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:46:27,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 358 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 852 Invalid, 0 Unknown, 357 Unchecked, 0.5s Time] [2022-01-18 17:46:27,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2022-01-18 17:46:27,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 3154. [2022-01-18 17:46:27,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3154 states, 3153 states have (on average 3.587059942911513) internal successors, (11310), 3153 states have internal predecessors, (11310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3154 states to 3154 states and 11310 transitions. [2022-01-18 17:46:28,022 INFO L78 Accepts]: Start accepts. Automaton has 3154 states and 11310 transitions. Word has length 26 [2022-01-18 17:46:28,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:46:28,022 INFO L470 AbstractCegarLoop]: Abstraction has 3154 states and 11310 transitions. [2022-01-18 17:46:28,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 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) [2022-01-18 17:46:28,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3154 states and 11310 transitions. [2022-01-18 17:46:28,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:46:28,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:46:28,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:46:28,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 17:46:28,227 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 [2022-01-18 17:46:28,227 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:46:28,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:46:28,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2033699288, now seen corresponding path program 43 times [2022-01-18 17:46:28,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:46:28,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997419790] [2022-01-18 17:46:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:46:28,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:46:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:46:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:28,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:46:28,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997419790] [2022-01-18 17:46:28,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997419790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:46:28,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656563117] [2022-01-18 17:46:28,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:46:28,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:46:28,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:46:28,544 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) [2022-01-18 17:46:28,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 17:46:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:46:28,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:46:28,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:46:28,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:46:28,870 INFO L353 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2022-01-18 17:46:28,871 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 113 treesize of output 99 [2022-01-18 17:46:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:29,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:46:29,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:29,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:29,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:29,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:29,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-18 17:46:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:29,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656563117] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:46:29,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:46:29,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-01-18 17:46:29,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527442482] [2022-01-18 17:46:29,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:46:29,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 17:46:29,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:46:29,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 17:46:29,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:46:29,350 INFO L87 Difference]: Start difference. First operand 3154 states and 11310 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:32,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:46:32,238 INFO L93 Difference]: Finished difference Result 4979 states and 16970 transitions. [2022-01-18 17:46:32,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 17:46:32,238 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:46:32,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:46:32,248 INFO L225 Difference]: With dead ends: 4979 [2022-01-18 17:46:32,248 INFO L226 Difference]: Without dead ends: 4899 [2022-01-18 17:46:32,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2511 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1153, Invalid=6679, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 17:46:32,249 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 291 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:46:32,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 453 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1699 Invalid, 0 Unknown, 222 Unchecked, 0.8s Time] [2022-01-18 17:46:32,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2022-01-18 17:46:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 3160. [2022-01-18 17:46:32,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3160 states, 3159 states have (on average 3.5875276986388096) internal successors, (11333), 3159 states have internal predecessors, (11333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:32,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 11333 transitions. [2022-01-18 17:46:32,306 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 11333 transitions. Word has length 26 [2022-01-18 17:46:32,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:46:32,306 INFO L470 AbstractCegarLoop]: Abstraction has 3160 states and 11333 transitions. [2022-01-18 17:46:32,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:32,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 11333 transitions. [2022-01-18 17:46:32,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:46:32,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:46:32,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:46:32,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 17:46:32,512 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 [2022-01-18 17:46:32,512 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:46:32,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:46:32,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1457232352, now seen corresponding path program 44 times [2022-01-18 17:46:32,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:46:32,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863971014] [2022-01-18 17:46:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:46:32,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:46:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:46:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:32,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:46:32,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863971014] [2022-01-18 17:46:32,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863971014] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:46:32,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613302652] [2022-01-18 17:46:32,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:46:32,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:46:32,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:46:32,789 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) [2022-01-18 17:46:32,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 17:46:32,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:46:32,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:46:32,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 17:46:32,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:46:33,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:46:33,145 INFO L353 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2022-01-18 17:46:33,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 126 treesize of output 102 [2022-01-18 17:46:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:33,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:46:33,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:33,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:33,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:33,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:33,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-18 17:46:33,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:33,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613302652] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:46:33,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:46:33,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2022-01-18 17:46:33,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286858832] [2022-01-18 17:46:33,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:46:33,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 17:46:33,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:46:33,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 17:46:33,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:46:33,671 INFO L87 Difference]: Start difference. First operand 3160 states and 11333 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:43,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:46:43,988 INFO L93 Difference]: Finished difference Result 8144 states and 26589 transitions. [2022-01-18 17:46:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-18 17:46:43,988 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:46:43,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:46:44,004 INFO L225 Difference]: With dead ends: 8144 [2022-01-18 17:46:44,004 INFO L226 Difference]: Without dead ends: 8004 [2022-01-18 17:46:44,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 12393 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=5769, Invalid=23987, Unknown=0, NotChecked=0, Total=29756 [2022-01-18 17:46:44,006 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 824 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 2889 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 3116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 2889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:46:44,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 728 Invalid, 3116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 2889 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 17:46:44,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8004 states. [2022-01-18 17:46:44,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8004 to 3258. [2022-01-18 17:46:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3258 states, 3257 states have (on average 3.604237027939822) internal successors, (11739), 3257 states have internal predecessors, (11739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3258 states to 3258 states and 11739 transitions. [2022-01-18 17:46:44,096 INFO L78 Accepts]: Start accepts. Automaton has 3258 states and 11739 transitions. Word has length 26 [2022-01-18 17:46:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:46:44,096 INFO L470 AbstractCegarLoop]: Abstraction has 3258 states and 11739 transitions. [2022-01-18 17:46:44,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 3258 states and 11739 transitions. [2022-01-18 17:46:44,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:46:44,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:46:44,101 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] [2022-01-18 17:46:44,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-01-18 17:46:44,302 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 [2022-01-18 17:46:44,302 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:46:44,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:46:44,303 INFO L85 PathProgramCache]: Analyzing trace with hash -796349720, now seen corresponding path program 37 times [2022-01-18 17:46:44,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:46:44,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645013204] [2022-01-18 17:46:44,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:46:44,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:46:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:46:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:44,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:46:44,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645013204] [2022-01-18 17:46:44,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645013204] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:46:44,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639855510] [2022-01-18 17:46:44,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:46:44,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:46:44,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:46:44,490 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) [2022-01-18 17:46:44,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 17:46:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:46:44,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:46:44,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:46:44,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:46:44,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:44,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-01-18 17:46:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:44,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:46:45,049 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:46:45,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:46:45,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:45,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:45,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:45,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:46:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:45,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639855510] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:46:45,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:46:45,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:46:45,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039099885] [2022-01-18 17:46:45,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:46:45,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:46:45,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:46:45,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:46:45,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:46:45,407 INFO L87 Difference]: Start difference. First operand 3258 states and 11739 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:47,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:46:47,943 INFO L93 Difference]: Finished difference Result 5863 states and 19657 transitions. [2022-01-18 17:46:47,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 17:46:47,943 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:46:47,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:46:47,954 INFO L225 Difference]: With dead ends: 5863 [2022-01-18 17:46:47,955 INFO L226 Difference]: Without dead ends: 5787 [2022-01-18 17:46:47,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1778 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=851, Invalid=4849, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 17:46:47,956 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 407 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:46:47,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 326 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:46:47,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5787 states. [2022-01-18 17:46:48,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5787 to 3266. [2022-01-18 17:46:48,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 3265 states have (on average 3.6042879019908116) internal successors, (11768), 3265 states have internal predecessors, (11768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 11768 transitions. [2022-01-18 17:46:48,038 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 11768 transitions. Word has length 26 [2022-01-18 17:46:48,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:46:48,038 INFO L470 AbstractCegarLoop]: Abstraction has 3266 states and 11768 transitions. [2022-01-18 17:46:48,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:48,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 11768 transitions. [2022-01-18 17:46:48,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:46:48,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:46:48,043 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] [2022-01-18 17:46:48,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-01-18 17:46:48,244 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 [2022-01-18 17:46:48,244 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:46:48,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:46:48,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1263964854, now seen corresponding path program 38 times [2022-01-18 17:46:48,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:46:48,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320073601] [2022-01-18 17:46:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:46:48,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:46:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:46:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:48,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:46:48,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320073601] [2022-01-18 17:46:48,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320073601] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:46:48,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727133396] [2022-01-18 17:46:48,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:46:48,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:46:48,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:46:48,464 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) [2022-01-18 17:46:48,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 17:46:48,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:46:48,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:46:48,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:46:48,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:46:48,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:46:48,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:48,838 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 33 treesize of output 41 [2022-01-18 17:46:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:49,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:46:49,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:49,195 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 38 treesize of output 71 [2022-01-18 17:46:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:50,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727133396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:46:50,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:46:50,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:46:50,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622655365] [2022-01-18 17:46:50,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:46:50,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:46:50,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:46:50,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:46:50,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:46:50,009 INFO L87 Difference]: Start difference. First operand 3266 states and 11768 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:53,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:46:53,197 INFO L93 Difference]: Finished difference Result 5890 states and 19730 transitions. [2022-01-18 17:46:53,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 17:46:53,198 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:46:53,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:46:53,209 INFO L225 Difference]: With dead ends: 5890 [2022-01-18 17:46:53,209 INFO L226 Difference]: Without dead ends: 5875 [2022-01-18 17:46:53,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 35 SyntacticMatches, 15 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1146, Invalid=4404, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 17:46:53,210 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 448 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:46:53,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 341 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1011 Invalid, 0 Unknown, 188 Unchecked, 0.6s Time] [2022-01-18 17:46:53,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5875 states. [2022-01-18 17:46:53,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5875 to 3263. [2022-01-18 17:46:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 3.604843654199877) internal successors, (11759), 3262 states have internal predecessors, (11759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 11759 transitions. [2022-01-18 17:46:53,281 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 11759 transitions. Word has length 26 [2022-01-18 17:46:53,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:46:53,281 INFO L470 AbstractCegarLoop]: Abstraction has 3263 states and 11759 transitions. [2022-01-18 17:46:53,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 11759 transitions. [2022-01-18 17:46:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:46:53,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:46:53,287 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:46:53,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-18 17:46:53,487 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 [2022-01-18 17:46:53,487 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:46:53,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:46:53,488 INFO L85 PathProgramCache]: Analyzing trace with hash -442415060, now seen corresponding path program 45 times [2022-01-18 17:46:53,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:46:53,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853953197] [2022-01-18 17:46:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:46:53,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:46:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:46:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:53,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:46:53,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853953197] [2022-01-18 17:46:53,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853953197] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:46:53,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387207745] [2022-01-18 17:46:53,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:46:53,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:46:53,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:46:53,728 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) [2022-01-18 17:46:53,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 17:46:53,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:46:53,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:46:53,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 17:46:53,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:46:54,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:46:54,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:46:54,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:54,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:54,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 17:46:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:54,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:46:54,178 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:46:54,179 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 47 [2022-01-18 17:46:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:54,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387207745] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:46:54,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:46:54,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 17:46:54,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546819928] [2022-01-18 17:46:54,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:46:54,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:46:54,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:46:54,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:46:54,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:46:54,548 INFO L87 Difference]: Start difference. First operand 3263 states and 11759 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:55,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:46:55,735 INFO L93 Difference]: Finished difference Result 4518 states and 15769 transitions. [2022-01-18 17:46:55,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 17:46:55,735 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:46:55,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:46:55,744 INFO L225 Difference]: With dead ends: 4518 [2022-01-18 17:46:55,744 INFO L226 Difference]: Without dead ends: 4438 [2022-01-18 17:46:55,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=427, Invalid=2123, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 17:46:55,745 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 222 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:46:55,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 267 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 889 Invalid, 0 Unknown, 227 Unchecked, 0.4s Time] [2022-01-18 17:46:55,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2022-01-18 17:46:55,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3243. [2022-01-18 17:46:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3243 states, 3242 states have (on average 3.6085749537322642) internal successors, (11699), 3242 states have internal predecessors, (11699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3243 states to 3243 states and 11699 transitions. [2022-01-18 17:46:55,802 INFO L78 Accepts]: Start accepts. Automaton has 3243 states and 11699 transitions. Word has length 26 [2022-01-18 17:46:55,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:46:55,803 INFO L470 AbstractCegarLoop]: Abstraction has 3243 states and 11699 transitions. [2022-01-18 17:46:55,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3243 states and 11699 transitions. [2022-01-18 17:46:55,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:46:55,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:46:55,808 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:46:55,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-18 17:46:56,008 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 [2022-01-18 17:46:56,009 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:46:56,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:46:56,009 INFO L85 PathProgramCache]: Analyzing trace with hash -201202114, now seen corresponding path program 46 times [2022-01-18 17:46:56,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:46:56,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646495336] [2022-01-18 17:46:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:46:56,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:46:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:46:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:56,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:46:56,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646495336] [2022-01-18 17:46:56,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646495336] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:46:56,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131072975] [2022-01-18 17:46:56,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:46:56,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:46:56,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:46:56,268 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) [2022-01-18 17:46:56,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 17:46:56,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:46:56,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:46:56,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:46:56,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:46:56,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:46:56,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:46:56,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:56,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2022-01-18 17:46:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:56,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:46:56,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:56,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:56,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:46:56,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:46:56,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-18 17:46:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:56,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131072975] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:46:56,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:46:56,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-01-18 17:46:56,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539304242] [2022-01-18 17:46:56,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:46:56,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:46:56,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:46:56,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:46:56,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:46:56,949 INFO L87 Difference]: Start difference. First operand 3243 states and 11699 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:59,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:46:59,296 INFO L93 Difference]: Finished difference Result 6253 states and 21260 transitions. [2022-01-18 17:46:59,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 17:46:59,296 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:46:59,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:46:59,309 INFO L225 Difference]: With dead ends: 6253 [2022-01-18 17:46:59,309 INFO L226 Difference]: Without dead ends: 6161 [2022-01-18 17:46:59,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1002, Invalid=4698, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 17:46:59,310 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 386 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:46:59,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 455 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1400 Invalid, 0 Unknown, 321 Unchecked, 0.7s Time] [2022-01-18 17:46:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2022-01-18 17:46:59,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 3349. [2022-01-18 17:46:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3349 states, 3348 states have (on average 3.607228195937873) internal successors, (12077), 3348 states have internal predecessors, (12077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3349 states to 3349 states and 12077 transitions. [2022-01-18 17:46:59,401 INFO L78 Accepts]: Start accepts. Automaton has 3349 states and 12077 transitions. Word has length 26 [2022-01-18 17:46:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:46:59,401 INFO L470 AbstractCegarLoop]: Abstraction has 3349 states and 12077 transitions. [2022-01-18 17:46:59,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:59,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3349 states and 12077 transitions. [2022-01-18 17:46:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:46:59,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:46:59,407 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] [2022-01-18 17:46:59,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-01-18 17:46:59,607 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 [2022-01-18 17:46:59,607 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:46:59,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:46:59,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1867510744, now seen corresponding path program 39 times [2022-01-18 17:46:59,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:46:59,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321091135] [2022-01-18 17:46:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:46:59,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:46:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:46:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:46:59,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:46:59,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321091135] [2022-01-18 17:46:59,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321091135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:46:59,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775148671] [2022-01-18 17:46:59,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:46:59,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:46:59,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:46:59,779 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) [2022-01-18 17:46:59,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 17:46:59,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:46:59,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:46:59,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:46:59,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:00,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:47:00,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:00,056 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 30 treesize of output 38 [2022-01-18 17:47:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:00,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:00,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:00,381 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 37 treesize of output 70 [2022-01-18 17:47:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:01,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775148671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:47:01,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:47:01,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 17:47:01,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166794477] [2022-01-18 17:47:01,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:47:01,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:47:01,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:47:01,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:47:01,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:47:01,293 INFO L87 Difference]: Start difference. First operand 3349 states and 12077 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2022-01-18 17:47:04,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:47:04,172 INFO L93 Difference]: Finished difference Result 6399 states and 21260 transitions. [2022-01-18 17:47:04,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 17:47:04,173 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 [2022-01-18 17:47:04,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:47:04,186 INFO L225 Difference]: With dead ends: 6399 [2022-01-18 17:47:04,186 INFO L226 Difference]: Without dead ends: 6334 [2022-01-18 17:47:04,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1079, Invalid=4323, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 17:47:04,187 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 377 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:47:04,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 370 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1216 Invalid, 0 Unknown, 313 Unchecked, 0.6s Time] [2022-01-18 17:47:04,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2022-01-18 17:47:04,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 3288. [2022-01-18 17:47:04,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3288 states, 3287 states have (on average 3.606327958624886) internal successors, (11854), 3287 states have internal predecessors, (11854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 11854 transitions. [2022-01-18 17:47:04,258 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 11854 transitions. Word has length 26 [2022-01-18 17:47:04,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:47:04,258 INFO L470 AbstractCegarLoop]: Abstraction has 3288 states and 11854 transitions. [2022-01-18 17:47:04,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2022-01-18 17:47:04,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 11854 transitions. [2022-01-18 17:47:04,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:47:04,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:47:04,263 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] [2022-01-18 17:47:04,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 17:47:04,465 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 [2022-01-18 17:47:04,465 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:47:04,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:47:04,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2048965000, now seen corresponding path program 40 times [2022-01-18 17:47:04,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:47:04,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548478485] [2022-01-18 17:47:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:47:04,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:47:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:04,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:47:04,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548478485] [2022-01-18 17:47:04,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548478485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:47:04,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077564867] [2022-01-18 17:47:04,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:47:04,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:47:04,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:47:04,614 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) [2022-01-18 17:47:04,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 17:47:04,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:47:04,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:47:04,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:47:04,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:04,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:47:04,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:04,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-01-18 17:47:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:04,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:05,134 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:47:05,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:47:05,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:05,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:05,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:05,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:47:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:05,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077564867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:47:05,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:47:05,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:47:05,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200525493] [2022-01-18 17:47:05,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:47:05,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:47:05,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:47:05,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:47:05,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:47:05,527 INFO L87 Difference]: Start difference. First operand 3288 states and 11854 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:07,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:47:07,927 INFO L93 Difference]: Finished difference Result 5718 states and 19427 transitions. [2022-01-18 17:47:07,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:47:07,927 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:47:07,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:47:07,939 INFO L225 Difference]: With dead ends: 5718 [2022-01-18 17:47:07,939 INFO L226 Difference]: Without dead ends: 5688 [2022-01-18 17:47:07,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=684, Invalid=4428, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 17:47:07,940 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 237 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 2224 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 2265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:47:07,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 503 Invalid, 2265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2224 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:47:07,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5688 states. [2022-01-18 17:47:08,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5688 to 3282. [2022-01-18 17:47:08,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3282 states, 3281 states have (on average 3.602255409935995) internal successors, (11819), 3281 states have internal predecessors, (11819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:08,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3282 states to 3282 states and 11819 transitions. [2022-01-18 17:47:08,025 INFO L78 Accepts]: Start accepts. Automaton has 3282 states and 11819 transitions. Word has length 26 [2022-01-18 17:47:08,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:47:08,025 INFO L470 AbstractCegarLoop]: Abstraction has 3282 states and 11819 transitions. [2022-01-18 17:47:08,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3282 states and 11819 transitions. [2022-01-18 17:47:08,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:47:08,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:47:08,030 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] [2022-01-18 17:47:08,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-01-18 17:47:08,231 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 [2022-01-18 17:47:08,231 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:47:08,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:47:08,232 INFO L85 PathProgramCache]: Analyzing trace with hash 581625440, now seen corresponding path program 41 times [2022-01-18 17:47:08,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:47:08,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156930369] [2022-01-18 17:47:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:47:08,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:47:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:08,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:47:08,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156930369] [2022-01-18 17:47:08,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156930369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:47:08,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454363482] [2022-01-18 17:47:08,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:47:08,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:47:08,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:47:08,388 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) [2022-01-18 17:47:08,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 17:47:08,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:47:08,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:47:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:47:08,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:08,649 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-01-18 17:47:08,649 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 63 [2022-01-18 17:47:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:08,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:08,944 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:47:08,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:47:09,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:09,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:09,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:09,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:47:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:09,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454363482] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:47:09,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:47:09,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:47:09,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177089557] [2022-01-18 17:47:09,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:47:09,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:47:09,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:47:09,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:47:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:47:09,333 INFO L87 Difference]: Start difference. First operand 3282 states and 11819 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:12,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:47:12,370 INFO L93 Difference]: Finished difference Result 6585 states and 21868 transitions. [2022-01-18 17:47:12,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 17:47:12,370 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:47:12,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:47:12,383 INFO L225 Difference]: With dead ends: 6585 [2022-01-18 17:47:12,384 INFO L226 Difference]: Without dead ends: 6485 [2022-01-18 17:47:12,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=941, Invalid=4461, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 17:47:12,384 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 312 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1706 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:47:12,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 421 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1706 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:47:12,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6485 states. [2022-01-18 17:47:12,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6485 to 3306. [2022-01-18 17:47:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3306 states, 3305 states have (on average 3.5972768532526476) internal successors, (11889), 3305 states have internal predecessors, (11889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 11889 transitions. [2022-01-18 17:47:12,460 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 11889 transitions. Word has length 26 [2022-01-18 17:47:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:47:12,460 INFO L470 AbstractCegarLoop]: Abstraction has 3306 states and 11889 transitions. [2022-01-18 17:47:12,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 11889 transitions. [2022-01-18 17:47:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:47:12,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:47:12,465 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] [2022-01-18 17:47:12,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-18 17:47:12,665 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 [2022-01-18 17:47:12,666 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:47:12,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:47:12,666 INFO L85 PathProgramCache]: Analyzing trace with hash 919972282, now seen corresponding path program 42 times [2022-01-18 17:47:12,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:47:12,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536814087] [2022-01-18 17:47:12,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:47:12,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:47:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:12,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:47:12,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536814087] [2022-01-18 17:47:12,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536814087] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:47:12,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869520460] [2022-01-18 17:47:12,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:47:12,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:47:12,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:47:12,811 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) [2022-01-18 17:47:12,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 17:47:12,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:47:12,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:47:12,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:47:12,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:13,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:47:13,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:47:13,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:13,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 17:47:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:13,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:13,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:13,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:13,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:13,459 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 38 treesize of output 55 [2022-01-18 17:47:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:13,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869520460] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:47:13,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:47:13,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 17:47:13,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293021936] [2022-01-18 17:47:13,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:47:13,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:47:13,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:47:13,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:47:13,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:47:13,699 INFO L87 Difference]: Start difference. First operand 3306 states and 11889 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:17,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:47:17,484 INFO L93 Difference]: Finished difference Result 6572 states and 22169 transitions. [2022-01-18 17:47:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 17:47:17,487 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:47:17,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:47:17,500 INFO L225 Difference]: With dead ends: 6572 [2022-01-18 17:47:17,501 INFO L226 Difference]: Without dead ends: 6527 [2022-01-18 17:47:17,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3470 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1542, Invalid=8964, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 17:47:17,501 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 476 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 2198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 920 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:47:17,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 630 Invalid, 2198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1212 Invalid, 0 Unknown, 920 Unchecked, 0.6s Time] [2022-01-18 17:47:17,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6527 states. [2022-01-18 17:47:17,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6527 to 3341. [2022-01-18 17:47:17,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 3340 states have (on average 3.6035928143712574) internal successors, (12036), 3340 states have internal predecessors, (12036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 12036 transitions. [2022-01-18 17:47:17,573 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 12036 transitions. Word has length 26 [2022-01-18 17:47:17,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:47:17,573 INFO L470 AbstractCegarLoop]: Abstraction has 3341 states and 12036 transitions. [2022-01-18 17:47:17,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:17,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 12036 transitions. [2022-01-18 17:47:17,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:47:17,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:47:17,578 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] [2022-01-18 17:47:17,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-01-18 17:47:17,778 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 [2022-01-18 17:47:17,779 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:47:17,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:47:17,779 INFO L85 PathProgramCache]: Analyzing trace with hash 796347224, now seen corresponding path program 43 times [2022-01-18 17:47:17,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:47:17,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095262633] [2022-01-18 17:47:17,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:47:17,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:47:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:17,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:47:17,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095262633] [2022-01-18 17:47:17,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095262633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:47:17,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731758138] [2022-01-18 17:47:17,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:47:17,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:47:17,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:47:17,922 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) [2022-01-18 17:47:17,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 17:47:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:17,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:47:17,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:18,177 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-01-18 17:47:18,178 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 64 [2022-01-18 17:47:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:18,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:18,434 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:47:18,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:47:18,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:18,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:18,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:18,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:47:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:18,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731758138] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:47:18,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:47:18,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:47:18,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783842246] [2022-01-18 17:47:18,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:47:18,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:47:18,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:47:18,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:47:18,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:47:18,826 INFO L87 Difference]: Start difference. First operand 3341 states and 12036 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:47:21,063 INFO L93 Difference]: Finished difference Result 5825 states and 19778 transitions. [2022-01-18 17:47:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 17:47:21,063 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:47:21,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:47:21,075 INFO L225 Difference]: With dead ends: 5825 [2022-01-18 17:47:21,075 INFO L226 Difference]: Without dead ends: 5787 [2022-01-18 17:47:21,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=759, Invalid=4071, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 17:47:21,076 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 298 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:47:21,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 449 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:47:21,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5787 states. [2022-01-18 17:47:21,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5787 to 3342. [2022-01-18 17:47:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3342 states, 3341 states have (on average 3.6025142173002096) internal successors, (12036), 3341 states have internal predecessors, (12036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:21,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3342 states to 3342 states and 12036 transitions. [2022-01-18 17:47:21,149 INFO L78 Accepts]: Start accepts. Automaton has 3342 states and 12036 transitions. Word has length 26 [2022-01-18 17:47:21,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:47:21,149 INFO L470 AbstractCegarLoop]: Abstraction has 3342 states and 12036 transitions. [2022-01-18 17:47:21,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3342 states and 12036 transitions. [2022-01-18 17:47:21,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:47:21,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:47:21,154 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] [2022-01-18 17:47:21,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 17:47:21,355 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 [2022-01-18 17:47:21,355 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:47:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:47:21,355 INFO L85 PathProgramCache]: Analyzing trace with hash -326643600, now seen corresponding path program 44 times [2022-01-18 17:47:21,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:47:21,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377514043] [2022-01-18 17:47:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:47:21,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:47:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:21,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:47:21,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377514043] [2022-01-18 17:47:21,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377514043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:47:21,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103290781] [2022-01-18 17:47:21,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:47:21,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:47:21,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:47:21,507 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) [2022-01-18 17:47:21,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 17:47:21,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:47:21,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:47:21,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:47:21,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:21,775 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-01-18 17:47:21,775 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 63 [2022-01-18 17:47:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:21,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:22,038 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:47:22,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:47:22,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:22,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:22,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:22,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:47:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:22,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103290781] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:47:22,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:47:22,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:47:22,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157612219] [2022-01-18 17:47:22,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:47:22,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:47:22,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:47:22,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:47:22,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:47:22,487 INFO L87 Difference]: Start difference. First operand 3342 states and 12036 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2022-01-18 17:47:24,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:47:24,204 INFO L93 Difference]: Finished difference Result 5761 states and 19513 transitions. [2022-01-18 17:47:24,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:47:24,205 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:47:24,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:47:24,216 INFO L225 Difference]: With dead ends: 5761 [2022-01-18 17:47:24,216 INFO L226 Difference]: Without dead ends: 5681 [2022-01-18 17:47:24,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=641, Invalid=3265, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 17:47:24,217 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 310 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:47:24,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 301 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:47:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5681 states. [2022-01-18 17:47:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5681 to 3325. [2022-01-18 17:47:24,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3325 states, 3324 states have (on average 3.6028880866425994) internal successors, (11976), 3324 states have internal predecessors, (11976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3325 states to 3325 states and 11976 transitions. [2022-01-18 17:47:24,289 INFO L78 Accepts]: Start accepts. Automaton has 3325 states and 11976 transitions. Word has length 26 [2022-01-18 17:47:24,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:47:24,289 INFO L470 AbstractCegarLoop]: Abstraction has 3325 states and 11976 transitions. [2022-01-18 17:47:24,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2022-01-18 17:47:24,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3325 states and 11976 transitions. [2022-01-18 17:47:24,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:47:24,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:47:24,294 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] [2022-01-18 17:47:24,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-18 17:47:24,494 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 [2022-01-18 17:47:24,495 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:47:24,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:47:24,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1944965776, now seen corresponding path program 45 times [2022-01-18 17:47:24,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:47:24,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728722617] [2022-01-18 17:47:24,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:47:24,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:47:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:24,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:47:24,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728722617] [2022-01-18 17:47:24,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728722617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:47:24,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968302933] [2022-01-18 17:47:24,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:47:24,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:47:24,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:47:24,658 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) [2022-01-18 17:47:24,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 17:47:24,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:47:24,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:47:24,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:47:24,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:25,050 INFO L353 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-01-18 17:47:25,051 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 50 [2022-01-18 17:47:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:25,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:25,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:25,250 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 38 treesize of output 71 [2022-01-18 17:47:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:26,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968302933] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:47:26,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:47:26,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-01-18 17:47:26,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571513763] [2022-01-18 17:47:26,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:47:26,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:47:26,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:47:26,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:47:26,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:47:26,102 INFO L87 Difference]: Start difference. First operand 3325 states and 11976 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 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) [2022-01-18 17:47:27,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:47:27,767 INFO L93 Difference]: Finished difference Result 5329 states and 17858 transitions. [2022-01-18 17:47:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:47:27,768 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:47:27,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:47:27,778 INFO L225 Difference]: With dead ends: 5329 [2022-01-18 17:47:27,778 INFO L226 Difference]: Without dead ends: 5240 [2022-01-18 17:47:27,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=434, Invalid=2428, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 17:47:27,779 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 229 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:47:27,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 421 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1213 Invalid, 0 Unknown, 153 Unchecked, 0.6s Time] [2022-01-18 17:47:27,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5240 states. [2022-01-18 17:47:27,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5240 to 3399. [2022-01-18 17:47:27,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 3398 states have (on average 3.5991759858740435) internal successors, (12230), 3398 states have internal predecessors, (12230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 12230 transitions. [2022-01-18 17:47:27,859 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 12230 transitions. Word has length 26 [2022-01-18 17:47:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:47:27,860 INFO L470 AbstractCegarLoop]: Abstraction has 3399 states and 12230 transitions. [2022-01-18 17:47:27,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 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) [2022-01-18 17:47:27,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 12230 transitions. [2022-01-18 17:47:27,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:47:27,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:47:27,865 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] [2022-01-18 17:47:27,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-01-18 17:47:28,065 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 [2022-01-18 17:47:28,066 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:47:28,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:47:28,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1836189860, now seen corresponding path program 46 times [2022-01-18 17:47:28,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:47:28,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330352747] [2022-01-18 17:47:28,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:47:28,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:47:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:28,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:47:28,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330352747] [2022-01-18 17:47:28,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330352747] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:47:28,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844881073] [2022-01-18 17:47:28,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:47:28,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:47:28,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:47:28,210 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) [2022-01-18 17:47:28,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 17:47:28,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:47:28,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:47:28,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:47:28,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:28,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:47:28,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:28,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 17:47:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:28,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:28,775 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:28,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 71 [2022-01-18 17:47:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:29,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844881073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:47:29,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:47:29,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 17:47:29,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532971933] [2022-01-18 17:47:29,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:47:29,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:47:29,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:47:29,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:47:29,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:47:29,647 INFO L87 Difference]: Start difference. First operand 3399 states and 12230 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:31,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:47:31,234 INFO L93 Difference]: Finished difference Result 5187 states and 17669 transitions. [2022-01-18 17:47:31,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 17:47:31,234 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:47:31,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:47:31,244 INFO L225 Difference]: With dead ends: 5187 [2022-01-18 17:47:31,245 INFO L226 Difference]: Without dead ends: 5157 [2022-01-18 17:47:31,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=479, Invalid=2071, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 17:47:31,245 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 241 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:47:31,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 225 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 711 Invalid, 0 Unknown, 365 Unchecked, 0.3s Time] [2022-01-18 17:47:31,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5157 states. [2022-01-18 17:47:31,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5157 to 3468. [2022-01-18 17:47:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3468 states, 3467 states have (on average 3.5950389385635995) internal successors, (12464), 3467 states have internal predecessors, (12464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 12464 transitions. [2022-01-18 17:47:31,309 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 12464 transitions. Word has length 26 [2022-01-18 17:47:31,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:47:31,309 INFO L470 AbstractCegarLoop]: Abstraction has 3468 states and 12464 transitions. [2022-01-18 17:47:31,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:31,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 12464 transitions. [2022-01-18 17:47:31,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:47:31,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:47:31,314 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] [2022-01-18 17:47:31,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-01-18 17:47:31,515 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 [2022-01-18 17:47:31,515 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:47:31,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:47:31,515 INFO L85 PathProgramCache]: Analyzing trace with hash -2003998952, now seen corresponding path program 47 times [2022-01-18 17:47:31,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:47:31,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788987027] [2022-01-18 17:47:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:47:31,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:47:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:31,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:47:31,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788987027] [2022-01-18 17:47:31,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788987027] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:47:31,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692623540] [2022-01-18 17:47:31,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:47:31,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:47:31,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:47:31,661 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) [2022-01-18 17:47:31,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 17:47:31,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:47:31,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:47:31,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 17:47:31,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:31,959 INFO L353 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-01-18 17:47:31,960 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 55 [2022-01-18 17:47:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:31,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:32,156 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:47:32,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:47:32,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:32,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:32,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:32,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:47:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:32,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692623540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:47:32,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:47:32,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:47:32,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078107841] [2022-01-18 17:47:32,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:47:32,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:47:32,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:47:32,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:47:32,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:47:32,545 INFO L87 Difference]: Start difference. First operand 3468 states and 12464 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:35,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:47:35,253 INFO L93 Difference]: Finished difference Result 6444 states and 21715 transitions. [2022-01-18 17:47:35,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 17:47:35,254 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:47:35,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:47:35,267 INFO L225 Difference]: With dead ends: 6444 [2022-01-18 17:47:35,267 INFO L226 Difference]: Without dead ends: 6414 [2022-01-18 17:47:35,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=723, Invalid=4247, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 17:47:35,268 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 270 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1999 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:47:35,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 446 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1999 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:47:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6414 states. [2022-01-18 17:47:35,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6414 to 3448. [2022-01-18 17:47:35,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 3447 states have (on average 3.6011024078909197) internal successors, (12413), 3447 states have internal predecessors, (12413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 12413 transitions. [2022-01-18 17:47:35,346 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 12413 transitions. Word has length 26 [2022-01-18 17:47:35,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:47:35,346 INFO L470 AbstractCegarLoop]: Abstraction has 3448 states and 12413 transitions. [2022-01-18 17:47:35,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:35,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 12413 transitions. [2022-01-18 17:47:35,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:47:35,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:47:35,351 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] [2022-01-18 17:47:35,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-18 17:47:35,551 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 [2022-01-18 17:47:35,552 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:47:35,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:47:35,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1705225504, now seen corresponding path program 48 times [2022-01-18 17:47:35,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:47:35,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760664022] [2022-01-18 17:47:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:47:35,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:47:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:35,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:47:35,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760664022] [2022-01-18 17:47:35,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760664022] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:47:35,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570741486] [2022-01-18 17:47:35,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:47:35,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:47:35,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:47:35,693 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) [2022-01-18 17:47:35,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 17:47:35,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:47:35,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:47:35,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 17:47:35,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:35,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:47:35,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:35,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-01-18 17:47:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:36,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:36,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:36,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:36,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 55 [2022-01-18 17:47:36,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:36,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:36,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:36,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:47:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:36,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570741486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:47:36,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:47:36,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:47:36,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148429453] [2022-01-18 17:47:36,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:47:36,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:47:36,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:47:36,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:47:36,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:47:36,649 INFO L87 Difference]: Start difference. First operand 3448 states and 12413 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:38,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:47:38,071 INFO L93 Difference]: Finished difference Result 5237 states and 17842 transitions. [2022-01-18 17:47:38,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:47:38,071 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:47:38,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:47:38,081 INFO L225 Difference]: With dead ends: 5237 [2022-01-18 17:47:38,081 INFO L226 Difference]: Without dead ends: 5161 [2022-01-18 17:47:38,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=477, Invalid=1973, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 17:47:38,082 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 204 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:47:38,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 280 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 918 Invalid, 0 Unknown, 195 Unchecked, 0.4s Time] [2022-01-18 17:47:38,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2022-01-18 17:47:38,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 3474. [2022-01-18 17:47:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3474 states, 3473 states have (on average 3.593435070544198) internal successors, (12480), 3473 states have internal predecessors, (12480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:38,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3474 states to 3474 states and 12480 transitions. [2022-01-18 17:47:38,148 INFO L78 Accepts]: Start accepts. Automaton has 3474 states and 12480 transitions. Word has length 26 [2022-01-18 17:47:38,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:47:38,148 INFO L470 AbstractCegarLoop]: Abstraction has 3474 states and 12480 transitions. [2022-01-18 17:47:38,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:38,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3474 states and 12480 transitions. [2022-01-18 17:47:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:47:38,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:47:38,154 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] [2022-01-18 17:47:38,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 17:47:38,354 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 [2022-01-18 17:47:38,354 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:47:38,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:47:38,355 INFO L85 PathProgramCache]: Analyzing trace with hash 639330528, now seen corresponding path program 49 times [2022-01-18 17:47:38,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:47:38,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725547319] [2022-01-18 17:47:38,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:47:38,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:47:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:38,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:47:38,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725547319] [2022-01-18 17:47:38,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725547319] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:47:38,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101184322] [2022-01-18 17:47:38,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:47:38,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:47:38,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:47:38,515 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) [2022-01-18 17:47:38,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 17:47:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:38,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:47:38,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:38,814 INFO L353 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-01-18 17:47:38,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 58 [2022-01-18 17:47:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:38,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:39,019 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:47:39,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:47:39,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:39,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:39,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:39,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:47:39,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:39,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101184322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:47:39,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:47:39,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:47:39,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690554709] [2022-01-18 17:47:39,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:47:39,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:47:39,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:47:39,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:47:39,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:47:39,390 INFO L87 Difference]: Start difference. First operand 3474 states and 12480 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:47:40,345 INFO L93 Difference]: Finished difference Result 5553 states and 18988 transitions. [2022-01-18 17:47:40,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 17:47:40,346 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:47:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:47:40,357 INFO L225 Difference]: With dead ends: 5553 [2022-01-18 17:47:40,357 INFO L226 Difference]: Without dead ends: 5523 [2022-01-18 17:47:40,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=1665, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 17:47:40,357 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 165 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:47:40,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 290 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 913 Invalid, 0 Unknown, 228 Unchecked, 0.4s Time] [2022-01-18 17:47:40,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2022-01-18 17:47:40,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 3501. [2022-01-18 17:47:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3501 states, 3500 states have (on average 3.592285714285714) internal successors, (12573), 3500 states have internal predecessors, (12573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3501 states to 3501 states and 12573 transitions. [2022-01-18 17:47:40,426 INFO L78 Accepts]: Start accepts. Automaton has 3501 states and 12573 transitions. Word has length 26 [2022-01-18 17:47:40,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:47:40,426 INFO L470 AbstractCegarLoop]: Abstraction has 3501 states and 12573 transitions. [2022-01-18 17:47:40,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:40,426 INFO L276 IsEmpty]: Start isEmpty. Operand 3501 states and 12573 transitions. [2022-01-18 17:47:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:47:40,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:47:40,431 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] [2022-01-18 17:47:40,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-01-18 17:47:40,632 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 [2022-01-18 17:47:40,632 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:47:40,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:47:40,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1438671812, now seen corresponding path program 50 times [2022-01-18 17:47:40,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:47:40,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819309481] [2022-01-18 17:47:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:47:40,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:47:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:40,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:47:40,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819309481] [2022-01-18 17:47:40,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819309481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:47:40,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683527608] [2022-01-18 17:47:40,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:47:40,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:47:40,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:47:40,785 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) [2022-01-18 17:47:40,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 17:47:40,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:47:40,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:47:40,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:47:40,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:41,073 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-01-18 17:47:41,074 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 63 [2022-01-18 17:47:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:41,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:41,301 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:47:41,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:47:41,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:41,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:41,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:41,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:47:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:41,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683527608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:47:41,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:47:41,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:47:41,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893890264] [2022-01-18 17:47:41,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:47:41,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:47:41,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:47:41,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:47:41,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:47:41,706 INFO L87 Difference]: Start difference. First operand 3501 states and 12573 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:43,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:47:43,898 INFO L93 Difference]: Finished difference Result 5636 states and 19278 transitions. [2022-01-18 17:47:43,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 17:47:43,899 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:47:43,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:47:43,910 INFO L225 Difference]: With dead ends: 5636 [2022-01-18 17:47:43,910 INFO L226 Difference]: Without dead ends: 5621 [2022-01-18 17:47:43,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=573, Invalid=3587, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:47:43,911 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 223 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 2105 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 2149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:47:43,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 464 Invalid, 2149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2105 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:47:43,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5621 states. [2022-01-18 17:47:43,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5621 to 3519. [2022-01-18 17:47:43,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3519 states, 3518 states have (on average 3.590108015918135) internal successors, (12630), 3518 states have internal predecessors, (12630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:43,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3519 states to 3519 states and 12630 transitions. [2022-01-18 17:47:43,981 INFO L78 Accepts]: Start accepts. Automaton has 3519 states and 12630 transitions. Word has length 26 [2022-01-18 17:47:43,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:47:43,981 INFO L470 AbstractCegarLoop]: Abstraction has 3519 states and 12630 transitions. [2022-01-18 17:47:43,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:43,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3519 states and 12630 transitions. [2022-01-18 17:47:43,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:47:43,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:47:43,986 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] [2022-01-18 17:47:44,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-01-18 17:47:44,186 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 [2022-01-18 17:47:44,187 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:47:44,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:47:44,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1868803872, now seen corresponding path program 51 times [2022-01-18 17:47:44,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:47:44,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354429760] [2022-01-18 17:47:44,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:47:44,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:47:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:44,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:47:44,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354429760] [2022-01-18 17:47:44,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354429760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:47:44,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467626068] [2022-01-18 17:47:44,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:47:44,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:47:44,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:47:44,352 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) [2022-01-18 17:47:44,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 17:47:44,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:47:44,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:47:44,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:47:44,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:44,680 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 17:47:44,681 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 65 [2022-01-18 17:47:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:44,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:44,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:44,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 70 [2022-01-18 17:47:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:46,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467626068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:47:46,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:47:46,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:47:46,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274515487] [2022-01-18 17:47:46,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:47:46,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:47:46,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:47:46,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:47:46,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:47:46,004 INFO L87 Difference]: Start difference. First operand 3519 states and 12630 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:47,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:47:47,342 INFO L93 Difference]: Finished difference Result 5158 states and 17645 transitions. [2022-01-18 17:47:47,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 17:47:47,342 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:47:47,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:47:47,351 INFO L225 Difference]: With dead ends: 5158 [2022-01-18 17:47:47,351 INFO L226 Difference]: Without dead ends: 5082 [2022-01-18 17:47:47,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=420, Invalid=1650, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 17:47:47,352 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 216 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:47:47,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 249 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 449 Invalid, 0 Unknown, 472 Unchecked, 0.2s Time] [2022-01-18 17:47:47,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2022-01-18 17:47:47,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 3543. [2022-01-18 17:47:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 3.5928853754940713) internal successors, (12726), 3542 states have internal predecessors, (12726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:47,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 12726 transitions. [2022-01-18 17:47:47,408 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 12726 transitions. Word has length 26 [2022-01-18 17:47:47,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:47:47,408 INFO L470 AbstractCegarLoop]: Abstraction has 3543 states and 12726 transitions. [2022-01-18 17:47:47,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:47,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 12726 transitions. [2022-01-18 17:47:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:47:47,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:47:47,413 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] [2022-01-18 17:47:47,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-18 17:47:47,613 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 [2022-01-18 17:47:47,613 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:47:47,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:47:47,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1742870530, now seen corresponding path program 52 times [2022-01-18 17:47:47,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:47:47,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751171791] [2022-01-18 17:47:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:47:47,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:47:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:47,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:47:47,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751171791] [2022-01-18 17:47:47,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751171791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:47:47,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978651496] [2022-01-18 17:47:47,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:47:47,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:47:47,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:47:47,746 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) [2022-01-18 17:47:47,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 17:47:47,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:47:47,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:47:47,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:47:47,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:48,052 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 17:47:48,053 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 65 [2022-01-18 17:47:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:48,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:48,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:48,341 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 37 treesize of output 70 [2022-01-18 17:47:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:49,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978651496] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:47:49,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:47:49,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:47:49,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093985593] [2022-01-18 17:47:49,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:47:49,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:47:49,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:47:49,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:47:49,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:47:49,193 INFO L87 Difference]: Start difference. First operand 3543 states and 12726 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2022-01-18 17:47:50,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:47:50,596 INFO L93 Difference]: Finished difference Result 5144 states and 17580 transitions. [2022-01-18 17:47:50,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 17:47:50,597 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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 [2022-01-18 17:47:50,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:47:50,607 INFO L225 Difference]: With dead ends: 5144 [2022-01-18 17:47:50,607 INFO L226 Difference]: Without dead ends: 5068 [2022-01-18 17:47:50,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=440, Invalid=1722, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 17:47:50,608 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 171 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 409 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:47:50,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 249 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 427 Invalid, 0 Unknown, 409 Unchecked, 0.2s Time] [2022-01-18 17:47:50,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5068 states. [2022-01-18 17:47:50,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5068 to 3537. [2022-01-18 17:47:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3537 states, 3536 states have (on average 3.5924773755656108) internal successors, (12703), 3536 states have internal predecessors, (12703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3537 states to 3537 states and 12703 transitions. [2022-01-18 17:47:50,674 INFO L78 Accepts]: Start accepts. Automaton has 3537 states and 12703 transitions. Word has length 26 [2022-01-18 17:47:50,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:47:50,674 INFO L470 AbstractCegarLoop]: Abstraction has 3537 states and 12703 transitions. [2022-01-18 17:47:50,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2022-01-18 17:47:50,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3537 states and 12703 transitions. [2022-01-18 17:47:50,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:47:50,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:47:50,679 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] [2022-01-18 17:47:50,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-01-18 17:47:50,880 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 [2022-01-18 17:47:50,880 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:47:50,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:47:50,880 INFO L85 PathProgramCache]: Analyzing trace with hash 615736860, now seen corresponding path program 53 times [2022-01-18 17:47:50,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:47:50,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634929963] [2022-01-18 17:47:50,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:47:50,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:47:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:51,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:47:51,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634929963] [2022-01-18 17:47:51,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634929963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:47:51,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714102794] [2022-01-18 17:47:51,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:47:51,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:47:51,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:47:51,030 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) [2022-01-18 17:47:51,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 17:47:51,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:47:51,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:47:51,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:47:51,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:51,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:47:51,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:51,303 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 28 treesize of output 36 [2022-01-18 17:47:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:51,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:51,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:51,612 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 37 treesize of output 70 [2022-01-18 17:47:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:52,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714102794] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:47:52,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:47:52,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:47:52,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215673850] [2022-01-18 17:47:52,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:47:52,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:47:52,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:47:52,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:47:52,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:47:52,335 INFO L87 Difference]: Start difference. First operand 3537 states and 12703 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 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) [2022-01-18 17:47:54,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:47:54,056 INFO L93 Difference]: Finished difference Result 4499 states and 15523 transitions. [2022-01-18 17:47:54,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:47:54,057 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 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 26 [2022-01-18 17:47:54,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:47:54,065 INFO L225 Difference]: With dead ends: 4499 [2022-01-18 17:47:54,066 INFO L226 Difference]: Without dead ends: 4439 [2022-01-18 17:47:54,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=609, Invalid=3173, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:47:54,066 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 201 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:47:54,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 217 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 389 Invalid, 0 Unknown, 635 Unchecked, 0.2s Time] [2022-01-18 17:47:54,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4439 states. [2022-01-18 17:47:54,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4439 to 3602. [2022-01-18 17:47:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3602 states, 3601 states have (on average 3.5945570674812553) internal successors, (12944), 3601 states have internal predecessors, (12944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3602 states to 3602 states and 12944 transitions. [2022-01-18 17:47:54,128 INFO L78 Accepts]: Start accepts. Automaton has 3602 states and 12944 transitions. Word has length 26 [2022-01-18 17:47:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:47:54,128 INFO L470 AbstractCegarLoop]: Abstraction has 3602 states and 12944 transitions. [2022-01-18 17:47:54,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 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) [2022-01-18 17:47:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3602 states and 12944 transitions. [2022-01-18 17:47:54,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:47:54,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:47:54,134 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] [2022-01-18 17:47:54,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-18 17:47:54,334 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 [2022-01-18 17:47:54,334 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:47:54,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:47:54,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1041593588, now seen corresponding path program 54 times [2022-01-18 17:47:54,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:47:54,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113925922] [2022-01-18 17:47:54,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:47:54,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:47:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:54,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:47:54,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113925922] [2022-01-18 17:47:54,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113925922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:47:54,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048887974] [2022-01-18 17:47:54,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:47:54,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:47:54,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:47:54,483 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) [2022-01-18 17:47:54,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 17:47:54,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 17:47:54,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:47:54,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:47:54,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:54,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:47:54,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:54,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:54,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-01-18 17:47:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:54,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:55,032 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:47:55,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:47:55,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:55,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:47:55,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:55,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:47:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:55,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048887974] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:47:55,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:47:55,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:47:55,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789571174] [2022-01-18 17:47:55,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:47:55,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:47:55,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:47:55,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:47:55,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:47:55,453 INFO L87 Difference]: Start difference. First operand 3602 states and 12944 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:47:58,208 INFO L93 Difference]: Finished difference Result 6706 states and 22509 transitions. [2022-01-18 17:47:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 17:47:58,208 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:47:58,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:47:58,221 INFO L225 Difference]: With dead ends: 6706 [2022-01-18 17:47:58,222 INFO L226 Difference]: Without dead ends: 6604 [2022-01-18 17:47:58,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=925, Invalid=5237, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 17:47:58,222 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 322 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:47:58,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 510 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2112 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:47:58,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6604 states. [2022-01-18 17:47:58,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6604 to 3627. [2022-01-18 17:47:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 3.5948703805846662) internal successors, (13035), 3626 states have internal predecessors, (13035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 13035 transitions. [2022-01-18 17:47:58,297 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 13035 transitions. Word has length 26 [2022-01-18 17:47:58,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:47:58,298 INFO L470 AbstractCegarLoop]: Abstraction has 3627 states and 13035 transitions. [2022-01-18 17:47:58,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:58,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 13035 transitions. [2022-01-18 17:47:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:47:58,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:47:58,303 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] [2022-01-18 17:47:58,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-18 17:47:58,503 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 [2022-01-18 17:47:58,504 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:47:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:47:58,504 INFO L85 PathProgramCache]: Analyzing trace with hash 370220598, now seen corresponding path program 55 times [2022-01-18 17:47:58,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:47:58,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768279286] [2022-01-18 17:47:58,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:47:58,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:47:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:58,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:47:58,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768279286] [2022-01-18 17:47:58,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768279286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:47:58,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380085876] [2022-01-18 17:47:58,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:47:58,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:47:58,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:47:58,640 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) [2022-01-18 17:47:58,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 17:47:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:58,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:47:58,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:58,939 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 17:47:58,940 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 60 [2022-01-18 17:47:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:59,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:59,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:47:59,238 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 37 treesize of output 70 [2022-01-18 17:48:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:00,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380085876] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:00,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:00,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:48:00,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158207626] [2022-01-18 17:48:00,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:00,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:48:00,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:00,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:48:00,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:48:00,080 INFO L87 Difference]: Start difference. First operand 3627 states and 13035 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:48:01,375 INFO L93 Difference]: Finished difference Result 5475 states and 18680 transitions. [2022-01-18 17:48:01,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 17:48:01,375 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:48:01,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:48:01,385 INFO L225 Difference]: With dead ends: 5475 [2022-01-18 17:48:01,385 INFO L226 Difference]: Without dead ends: 5399 [2022-01-18 17:48:01,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 17:48:01,386 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 262 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 386 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:48:01,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 179 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 406 Invalid, 0 Unknown, 386 Unchecked, 0.2s Time] [2022-01-18 17:48:01,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5399 states. [2022-01-18 17:48:01,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5399 to 3633. [2022-01-18 17:48:01,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3633 states, 3632 states have (on average 3.592786343612335) internal successors, (13049), 3632 states have internal predecessors, (13049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:01,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 13049 transitions. [2022-01-18 17:48:01,447 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 13049 transitions. Word has length 26 [2022-01-18 17:48:01,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:48:01,447 INFO L470 AbstractCegarLoop]: Abstraction has 3633 states and 13049 transitions. [2022-01-18 17:48:01,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:01,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 13049 transitions. [2022-01-18 17:48:01,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:48:01,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:48:01,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:48:01,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-01-18 17:48:01,653 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 [2022-01-18 17:48:01,653 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:48:01,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:48:01,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1124130446, now seen corresponding path program 47 times [2022-01-18 17:48:01,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:48:01,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081313432] [2022-01-18 17:48:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:48:01,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:48:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:01,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:48:01,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081313432] [2022-01-18 17:48:01,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081313432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:48:01,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826150246] [2022-01-18 17:48:01,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:48:01,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:01,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:48:01,911 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) [2022-01-18 17:48:01,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 17:48:01,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:48:01,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:48:01,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:48:01,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:48:02,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:02,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:02,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:02,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-01-18 17:48:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:02,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:48:02,309 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:48:02,309 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 47 [2022-01-18 17:48:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:02,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826150246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:02,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:02,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 17:48:02,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736837527] [2022-01-18 17:48:02,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:02,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:48:02,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:02,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:48:02,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:48:02,436 INFO L87 Difference]: Start difference. First operand 3633 states and 13049 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 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) [2022-01-18 17:48:03,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:48:03,220 INFO L93 Difference]: Finished difference Result 5078 states and 17638 transitions. [2022-01-18 17:48:03,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 17:48:03,220 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 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 26 [2022-01-18 17:48:03,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:48:03,230 INFO L225 Difference]: With dead ends: 5078 [2022-01-18 17:48:03,230 INFO L226 Difference]: Without dead ends: 5030 [2022-01-18 17:48:03,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=318, Invalid=1662, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 17:48:03,230 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 167 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:48:03,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 233 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:48:03,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5030 states. [2022-01-18 17:48:03,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5030 to 3623. [2022-01-18 17:48:03,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 3.5919381557150745) internal successors, (13010), 3622 states have internal predecessors, (13010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:03,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 13010 transitions. [2022-01-18 17:48:03,294 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 13010 transitions. Word has length 26 [2022-01-18 17:48:03,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:48:03,294 INFO L470 AbstractCegarLoop]: Abstraction has 3623 states and 13010 transitions. [2022-01-18 17:48:03,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 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) [2022-01-18 17:48:03,294 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 13010 transitions. [2022-01-18 17:48:03,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:48:03,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:48:03,299 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:48:03,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-18 17:48:03,500 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 [2022-01-18 17:48:03,500 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:48:03,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:48:03,500 INFO L85 PathProgramCache]: Analyzing trace with hash 281045340, now seen corresponding path program 48 times [2022-01-18 17:48:03,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:48:03,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163178900] [2022-01-18 17:48:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:48:03,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:48:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:03,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:48:03,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163178900] [2022-01-18 17:48:03,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163178900] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:48:03,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141172889] [2022-01-18 17:48:03,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:48:03,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:03,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:48:03,667 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) [2022-01-18 17:48:03,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 17:48:03,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:48:03,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:48:03,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:48:03,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:48:04,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:04,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:48:04,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2022-01-18 17:48:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:04,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:48:04,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:04,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:04,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:48:04,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:48:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:04,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141172889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:04,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:04,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 17:48:04,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574520800] [2022-01-18 17:48:04,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:04,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 17:48:04,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:04,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 17:48:04,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:48:04,477 INFO L87 Difference]: Start difference. First operand 3623 states and 13010 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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) [2022-01-18 17:48:06,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:48:06,076 INFO L93 Difference]: Finished difference Result 5098 states and 17401 transitions. [2022-01-18 17:48:06,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 17:48:06,077 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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 26 [2022-01-18 17:48:06,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:48:06,086 INFO L225 Difference]: With dead ends: 5098 [2022-01-18 17:48:06,086 INFO L226 Difference]: Without dead ends: 5053 [2022-01-18 17:48:06,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=699, Invalid=4413, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 17:48:06,087 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 275 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 463 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:48:06,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 445 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 808 Invalid, 0 Unknown, 463 Unchecked, 0.4s Time] [2022-01-18 17:48:06,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5053 states. [2022-01-18 17:48:06,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5053 to 3665. [2022-01-18 17:48:06,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 3664 states have (on average 3.586517467248908) internal successors, (13141), 3664 states have internal predecessors, (13141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 13141 transitions. [2022-01-18 17:48:06,154 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 13141 transitions. Word has length 26 [2022-01-18 17:48:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:48:06,154 INFO L470 AbstractCegarLoop]: Abstraction has 3665 states and 13141 transitions. [2022-01-18 17:48:06,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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) [2022-01-18 17:48:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 13141 transitions. [2022-01-18 17:48:06,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:48:06,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:48:06,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:48:06,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-01-18 17:48:06,360 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 [2022-01-18 17:48:06,361 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:48:06,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:48:06,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1348919904, now seen corresponding path program 49 times [2022-01-18 17:48:06,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:48:06,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482907015] [2022-01-18 17:48:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:48:06,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:48:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:06,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:48:06,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482907015] [2022-01-18 17:48:06,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482907015] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:48:06,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674033864] [2022-01-18 17:48:06,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:48:06,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:06,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:48:06,567 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) [2022-01-18 17:48:06,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 17:48:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:06,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:48:06,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:48:06,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:06,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:06,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:06,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:06,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 21 [2022-01-18 17:48:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:06,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:48:06,947 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:48:06,948 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 47 [2022-01-18 17:48:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:07,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674033864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:07,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:07,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-01-18 17:48:07,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530124265] [2022-01-18 17:48:07,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:07,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:48:07,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:07,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:48:07,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:48:07,347 INFO L87 Difference]: Start difference. First operand 3665 states and 13141 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) 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) [2022-01-18 17:48:08,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:48:08,519 INFO L93 Difference]: Finished difference Result 4946 states and 17235 transitions. [2022-01-18 17:48:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 17:48:08,519 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) 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 26 [2022-01-18 17:48:08,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:48:08,529 INFO L225 Difference]: With dead ends: 4946 [2022-01-18 17:48:08,529 INFO L226 Difference]: Without dead ends: 4860 [2022-01-18 17:48:08,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=390, Invalid=2060, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 17:48:08,529 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 160 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 369 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:48:08,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 403 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1316 Invalid, 0 Unknown, 369 Unchecked, 0.5s Time] [2022-01-18 17:48:08,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4860 states. [2022-01-18 17:48:08,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4860 to 3679. [2022-01-18 17:48:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3679 states, 3678 states have (on average 3.5807504078303425) internal successors, (13170), 3678 states have internal predecessors, (13170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:08,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3679 states to 3679 states and 13170 transitions. [2022-01-18 17:48:08,591 INFO L78 Accepts]: Start accepts. Automaton has 3679 states and 13170 transitions. Word has length 26 [2022-01-18 17:48:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:48:08,591 INFO L470 AbstractCegarLoop]: Abstraction has 3679 states and 13170 transitions. [2022-01-18 17:48:08,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) 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) [2022-01-18 17:48:08,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3679 states and 13170 transitions. [2022-01-18 17:48:08,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:48:08,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:48:08,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:48:08,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-18 17:48:08,797 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 [2022-01-18 17:48:08,797 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:48:08,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:48:08,798 INFO L85 PathProgramCache]: Analyzing trace with hash 65573818, now seen corresponding path program 50 times [2022-01-18 17:48:08,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:48:08,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582151167] [2022-01-18 17:48:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:48:08,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:48:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:08,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:48:08,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582151167] [2022-01-18 17:48:08,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582151167] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:48:08,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822322288] [2022-01-18 17:48:08,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:48:08,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:08,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:48:08,994 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) [2022-01-18 17:48:08,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 17:48:09,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:48:09,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:48:09,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:48:09,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:48:09,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:09,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:09,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:09,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:09,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-01-18 17:48:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:09,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:48:09,422 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:48:09,422 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 47 [2022-01-18 17:48:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:09,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822322288] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:09,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:09,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 17:48:09,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430191508] [2022-01-18 17:48:09,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:09,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:48:09,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:09,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:48:09,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:48:09,585 INFO L87 Difference]: Start difference. First operand 3679 states and 13170 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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) [2022-01-18 17:48:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:48:10,455 INFO L93 Difference]: Finished difference Result 4996 states and 17400 transitions. [2022-01-18 17:48:10,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 17:48:10,455 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:48:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:48:10,465 INFO L225 Difference]: With dead ends: 4996 [2022-01-18 17:48:10,465 INFO L226 Difference]: Without dead ends: 4966 [2022-01-18 17:48:10,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=361, Invalid=1991, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 17:48:10,466 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 149 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:48:10,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 267 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:48:10,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4966 states. [2022-01-18 17:48:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4966 to 3665. [2022-01-18 17:48:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 3664 states have (on average 3.5848799126637556) internal successors, (13135), 3664 states have internal predecessors, (13135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:10,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 13135 transitions. [2022-01-18 17:48:10,530 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 13135 transitions. Word has length 26 [2022-01-18 17:48:10,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:48:10,531 INFO L470 AbstractCegarLoop]: Abstraction has 3665 states and 13135 transitions. [2022-01-18 17:48:10,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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) [2022-01-18 17:48:10,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 13135 transitions. [2022-01-18 17:48:10,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:48:10,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:48:10,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:48:10,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-01-18 17:48:10,736 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 [2022-01-18 17:48:10,737 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:48:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:48:10,737 INFO L85 PathProgramCache]: Analyzing trace with hash -308346528, now seen corresponding path program 51 times [2022-01-18 17:48:10,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:48:10,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721224882] [2022-01-18 17:48:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:48:10,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:48:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:10,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:48:10,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721224882] [2022-01-18 17:48:10,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721224882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:48:10,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072555112] [2022-01-18 17:48:10,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:48:10,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:10,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:48:10,940 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) [2022-01-18 17:48:10,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 17:48:10,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:48:10,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:48:10,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:48:10,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:48:11,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:11,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:11,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:11,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:48:11,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 48 [2022-01-18 17:48:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:11,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:48:11,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:11,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:11,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:11,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:48:11,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-18 17:48:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:11,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072555112] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:11,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:11,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 17:48:11,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822379395] [2022-01-18 17:48:11,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:11,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:48:11,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:11,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:48:11,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:48:11,528 INFO L87 Difference]: Start difference. First operand 3665 states and 13135 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:12,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:48:12,773 INFO L93 Difference]: Finished difference Result 4946 states and 17322 transitions. [2022-01-18 17:48:12,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:48:12,773 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:48:12,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:48:12,783 INFO L225 Difference]: With dead ends: 4946 [2022-01-18 17:48:12,783 INFO L226 Difference]: Without dead ends: 4916 [2022-01-18 17:48:12,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=540, Invalid=2652, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 17:48:12,784 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 184 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:48:12,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 242 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1133 Invalid, 0 Unknown, 33 Unchecked, 0.5s Time] [2022-01-18 17:48:12,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4916 states. [2022-01-18 17:48:12,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4916 to 3772. [2022-01-18 17:48:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3772 states, 3771 states have (on average 3.592150623176876) internal successors, (13546), 3771 states have internal predecessors, (13546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:12,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3772 states to 3772 states and 13546 transitions. [2022-01-18 17:48:12,853 INFO L78 Accepts]: Start accepts. Automaton has 3772 states and 13546 transitions. Word has length 26 [2022-01-18 17:48:12,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:48:12,854 INFO L470 AbstractCegarLoop]: Abstraction has 3772 states and 13546 transitions. [2022-01-18 17:48:12,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:12,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3772 states and 13546 transitions. [2022-01-18 17:48:12,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:48:12,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:48:12,859 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:48:12,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-01-18 17:48:13,060 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 [2022-01-18 17:48:13,060 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:48:13,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:48:13,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1165871128, now seen corresponding path program 52 times [2022-01-18 17:48:13,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:48:13,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881354422] [2022-01-18 17:48:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:48:13,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:48:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:13,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:48:13,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881354422] [2022-01-18 17:48:13,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881354422] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:48:13,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807378616] [2022-01-18 17:48:13,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:48:13,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:13,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:48:13,288 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) [2022-01-18 17:48:13,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 17:48:13,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:48:13,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:48:13,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:48:13,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:48:13,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:13,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:13,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:13,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:13,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-01-18 17:48:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:13,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:48:13,757 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:48:13,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 47 [2022-01-18 17:48:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:13,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807378616] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:13,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:13,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-01-18 17:48:13,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860235189] [2022-01-18 17:48:13,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:13,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:48:13,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:13,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:48:13,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:48:13,907 INFO L87 Difference]: Start difference. First operand 3772 states and 13546 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) 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) [2022-01-18 17:48:14,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:48:14,317 INFO L93 Difference]: Finished difference Result 4582 states and 16225 transitions. [2022-01-18 17:48:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 17:48:14,318 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) 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 26 [2022-01-18 17:48:14,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:48:14,327 INFO L225 Difference]: With dead ends: 4582 [2022-01-18 17:48:14,327 INFO L226 Difference]: Without dead ends: 4567 [2022-01-18 17:48:14,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:48:14,328 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 109 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:48:14,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 221 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 375 Invalid, 0 Unknown, 351 Unchecked, 0.2s Time] [2022-01-18 17:48:14,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4567 states. [2022-01-18 17:48:14,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4567 to 3782. [2022-01-18 17:48:14,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3782 states, 3781 states have (on average 3.5919069029357313) internal successors, (13581), 3781 states have internal predecessors, (13581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3782 states to 3782 states and 13581 transitions. [2022-01-18 17:48:14,390 INFO L78 Accepts]: Start accepts. Automaton has 3782 states and 13581 transitions. Word has length 26 [2022-01-18 17:48:14,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:48:14,390 INFO L470 AbstractCegarLoop]: Abstraction has 3782 states and 13581 transitions. [2022-01-18 17:48:14,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) 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) [2022-01-18 17:48:14,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3782 states and 13581 transitions. [2022-01-18 17:48:14,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:48:14,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:48:14,396 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] [2022-01-18 17:48:14,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-01-18 17:48:14,596 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 [2022-01-18 17:48:14,596 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:48:14,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:48:14,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1961622048, now seen corresponding path program 56 times [2022-01-18 17:48:14,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:48:14,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105211337] [2022-01-18 17:48:14,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:48:14,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:48:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:14,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:48:14,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105211337] [2022-01-18 17:48:14,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105211337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:48:14,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077694512] [2022-01-18 17:48:14,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:48:14,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:14,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:48:14,784 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) [2022-01-18 17:48:14,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 17:48:14,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:48:14,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:48:14,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:48:14,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:48:15,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:15,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:48:15,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-01-18 17:48:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:15,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:48:15,293 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:48:15,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:48:15,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:15,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:15,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:48:15,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:48:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:15,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077694512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:15,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:15,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:48:15,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230840843] [2022-01-18 17:48:15,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:15,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:48:15,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:15,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:48:15,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:48:15,670 INFO L87 Difference]: Start difference. First operand 3782 states and 13581 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:19,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:48:19,566 INFO L93 Difference]: Finished difference Result 7327 states and 24308 transitions. [2022-01-18 17:48:19,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 17:48:19,567 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:48:19,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:48:19,585 INFO L225 Difference]: With dead ends: 7327 [2022-01-18 17:48:19,585 INFO L226 Difference]: Without dead ends: 7297 [2022-01-18 17:48:19,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2338 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1078, Invalid=6062, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 17:48:19,586 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 445 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 2549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:48:19,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 608 Invalid, 2549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 17:48:19,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7297 states. [2022-01-18 17:48:19,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7297 to 3823. [2022-01-18 17:48:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3822 states have (on average 3.5907901622187337) internal successors, (13724), 3822 states have internal predecessors, (13724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 13724 transitions. [2022-01-18 17:48:19,720 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 13724 transitions. Word has length 26 [2022-01-18 17:48:19,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:48:19,721 INFO L470 AbstractCegarLoop]: Abstraction has 3823 states and 13724 transitions. [2022-01-18 17:48:19,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:19,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 13724 transitions. [2022-01-18 17:48:19,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:48:19,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:48:19,729 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:48:19,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-01-18 17:48:19,935 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 [2022-01-18 17:48:19,935 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:48:19,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:48:19,936 INFO L85 PathProgramCache]: Analyzing trace with hash -411240484, now seen corresponding path program 53 times [2022-01-18 17:48:19,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:48:19,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887611419] [2022-01-18 17:48:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:48:19,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:48:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:20,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:48:20,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887611419] [2022-01-18 17:48:20,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887611419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:48:20,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141725344] [2022-01-18 17:48:20,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:48:20,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:20,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:48:20,069 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) [2022-01-18 17:48:20,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 17:48:20,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:48:20,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:48:20,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:48:20,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:48:20,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:20,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:20,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:20,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-01-18 17:48:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:20,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:48:20,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:20,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:20,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:20,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:48:20,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-18 17:48:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:20,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141725344] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:20,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:20,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 17:48:20,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695040774] [2022-01-18 17:48:20,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:20,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:48:20,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:20,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:48:20,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:48:20,597 INFO L87 Difference]: Start difference. First operand 3823 states and 13724 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 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) [2022-01-18 17:48:21,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:48:21,874 INFO L93 Difference]: Finished difference Result 5770 states and 19224 transitions. [2022-01-18 17:48:21,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 17:48:21,874 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:48:21,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:48:21,886 INFO L225 Difference]: With dead ends: 5770 [2022-01-18 17:48:21,886 INFO L226 Difference]: Without dead ends: 5710 [2022-01-18 17:48:21,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=641, Invalid=2781, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 17:48:21,887 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 441 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:48:21,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 319 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:48:21,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5710 states. [2022-01-18 17:48:21,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5710 to 3968. [2022-01-18 17:48:21,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 3.596672548525334) internal successors, (14268), 3967 states have internal predecessors, (14268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:22,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 14268 transitions. [2022-01-18 17:48:22,000 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 14268 transitions. Word has length 26 [2022-01-18 17:48:22,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:48:22,001 INFO L470 AbstractCegarLoop]: Abstraction has 3968 states and 14268 transitions. [2022-01-18 17:48:22,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 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) [2022-01-18 17:48:22,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 14268 transitions. [2022-01-18 17:48:22,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:48:22,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:48:22,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:48:22,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-01-18 17:48:22,207 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 [2022-01-18 17:48:22,207 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:48:22,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:48:22,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1423144386, now seen corresponding path program 54 times [2022-01-18 17:48:22,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:48:22,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114890776] [2022-01-18 17:48:22,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:48:22,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:48:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:22,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:48:22,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114890776] [2022-01-18 17:48:22,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114890776] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:48:22,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222432302] [2022-01-18 17:48:22,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:48:22,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:22,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:48:22,346 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) [2022-01-18 17:48:22,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 17:48:22,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:48:22,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:48:22,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:48:22,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:48:22,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:22,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:22,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:22,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-01-18 17:48:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:22,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:48:22,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:22,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:22,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:22,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:22,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 17:48:22,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:22,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-18 17:48:22,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:22,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-18 17:48:22,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:22,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-18 17:48:22,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:22,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-18 17:48:23,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:23,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-18 17:48:23,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:23,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-18 17:48:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:48:23,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222432302] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:23,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:23,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 27 [2022-01-18 17:48:23,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022875242] [2022-01-18 17:48:23,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:23,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:48:23,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:23,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:48:23,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:48:23,053 INFO L87 Difference]: Start difference. First operand 3968 states and 14268 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:48:25,815 INFO L93 Difference]: Finished difference Result 9552 states and 31345 transitions. [2022-01-18 17:48:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 17:48:25,815 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:48:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:48:25,833 INFO L225 Difference]: With dead ends: 9552 [2022-01-18 17:48:25,834 INFO L226 Difference]: Without dead ends: 9467 [2022-01-18 17:48:25,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1560, Invalid=7182, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 17:48:25,834 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 455 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:48:25,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 546 Invalid, 2047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1672 Invalid, 0 Unknown, 288 Unchecked, 0.8s Time] [2022-01-18 17:48:25,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9467 states. [2022-01-18 17:48:25,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9467 to 4484. [2022-01-18 17:48:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4484 states, 4483 states have (on average 3.6165514164621904) internal successors, (16213), 4483 states have internal predecessors, (16213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4484 states to 4484 states and 16213 transitions. [2022-01-18 17:48:25,948 INFO L78 Accepts]: Start accepts. Automaton has 4484 states and 16213 transitions. Word has length 26 [2022-01-18 17:48:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:48:25,948 INFO L470 AbstractCegarLoop]: Abstraction has 4484 states and 16213 transitions. [2022-01-18 17:48:25,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 4484 states and 16213 transitions. [2022-01-18 17:48:25,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:48:25,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:48:25,955 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:48:25,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-18 17:48:26,155 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 [2022-01-18 17:48:26,155 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:48:26,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:48:26,156 INFO L85 PathProgramCache]: Analyzing trace with hash -579049576, now seen corresponding path program 55 times [2022-01-18 17:48:26,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:48:26,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724216816] [2022-01-18 17:48:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:48:26,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:48:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:26,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:48:26,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724216816] [2022-01-18 17:48:26,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724216816] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:48:26,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198136134] [2022-01-18 17:48:26,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:48:26,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:26,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:48:26,296 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) [2022-01-18 17:48:26,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 17:48:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:26,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:48:26,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:48:26,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:26,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:26,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:26,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:26,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-01-18 17:48:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:26,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:48:26,744 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:48:26,744 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 47 [2022-01-18 17:48:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:26,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198136134] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:26,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:26,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-01-18 17:48:26,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014714016] [2022-01-18 17:48:26,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:26,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:48:26,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:26,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:48:26,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:48:26,900 INFO L87 Difference]: Start difference. First operand 4484 states and 16213 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:31,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:48:31,978 INFO L93 Difference]: Finished difference Result 9683 states and 32510 transitions. [2022-01-18 17:48:31,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-18 17:48:31,978 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:48:31,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:48:31,998 INFO L225 Difference]: With dead ends: 9683 [2022-01-18 17:48:31,998 INFO L226 Difference]: Without dead ends: 9592 [2022-01-18 17:48:31,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5303 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2221, Invalid=12541, Unknown=0, NotChecked=0, Total=14762 [2022-01-18 17:48:31,999 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 448 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 2496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:48:31,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 696 Invalid, 2496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 17:48:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9592 states. [2022-01-18 17:48:32,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9592 to 4636. [2022-01-18 17:48:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 3.6306364617044227) internal successors, (16828), 4635 states have internal predecessors, (16828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 16828 transitions. [2022-01-18 17:48:32,117 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 16828 transitions. Word has length 26 [2022-01-18 17:48:32,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:48:32,117 INFO L470 AbstractCegarLoop]: Abstraction has 4636 states and 16828 transitions. [2022-01-18 17:48:32,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:32,118 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 16828 transitions. [2022-01-18 17:48:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:48:32,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:48:32,125 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] [2022-01-18 17:48:32,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-01-18 17:48:32,325 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 [2022-01-18 17:48:32,325 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:48:32,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:48:32,326 INFO L85 PathProgramCache]: Analyzing trace with hash -796062908, now seen corresponding path program 57 times [2022-01-18 17:48:32,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:48:32,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616517313] [2022-01-18 17:48:32,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:48:32,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:48:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:32,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:48:32,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616517313] [2022-01-18 17:48:32,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616517313] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:48:32,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897836137] [2022-01-18 17:48:32,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:48:32,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:32,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:48:32,498 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) [2022-01-18 17:48:32,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 17:48:32,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:48:32,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:48:32,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:48:32,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:48:32,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:48:32,834 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 33 treesize of output 49 [2022-01-18 17:48:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:33,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:48:33,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:48:33,398 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 38 treesize of output 71 [2022-01-18 17:48:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:34,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897836137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:34,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:34,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-01-18 17:48:34,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256620035] [2022-01-18 17:48:34,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:34,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:48:34,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:34,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:48:34,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:48:34,312 INFO L87 Difference]: Start difference. First operand 4636 states and 16828 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:36,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:48:36,449 INFO L93 Difference]: Finished difference Result 8331 states and 28855 transitions. [2022-01-18 17:48:36,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 17:48:36,450 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:48:36,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:48:36,471 INFO L225 Difference]: With dead ends: 8331 [2022-01-18 17:48:36,471 INFO L226 Difference]: Without dead ends: 8301 [2022-01-18 17:48:36,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=585, Invalid=3837, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 17:48:36,471 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 254 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 960 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:48:36,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 626 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 996 Invalid, 0 Unknown, 960 Unchecked, 0.5s Time] [2022-01-18 17:48:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2022-01-18 17:48:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 4655. [2022-01-18 17:48:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 3.6304254404813063) internal successors, (16896), 4654 states have internal predecessors, (16896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:36,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 16896 transitions. [2022-01-18 17:48:36,590 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 16896 transitions. Word has length 26 [2022-01-18 17:48:36,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:48:36,590 INFO L470 AbstractCegarLoop]: Abstraction has 4655 states and 16896 transitions. [2022-01-18 17:48:36,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:36,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 16896 transitions. [2022-01-18 17:48:36,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:48:36,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:48:36,598 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] [2022-01-18 17:48:36,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-01-18 17:48:36,798 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 [2022-01-18 17:48:36,798 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:48:36,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:48:36,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2004996666, now seen corresponding path program 58 times [2022-01-18 17:48:36,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:48:36,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485737777] [2022-01-18 17:48:36,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:48:36,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:48:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:36,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:48:36,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485737777] [2022-01-18 17:48:36,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485737777] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:48:36,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607015665] [2022-01-18 17:48:36,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:48:36,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:36,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:48:36,965 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) [2022-01-18 17:48:36,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 17:48:36,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:48:36,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:48:36,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:48:36,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:48:37,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:37,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:37,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-18 17:48:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:37,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:48:37,552 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:48:37,552 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 38 treesize of output 71 [2022-01-18 17:48:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:38,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607015665] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:38,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:38,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:48:38,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793949705] [2022-01-18 17:48:38,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:38,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:48:38,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:38,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:48:38,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:48:38,407 INFO L87 Difference]: Start difference. First operand 4655 states and 16896 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:40,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:48:40,488 INFO L93 Difference]: Finished difference Result 8027 states and 27505 transitions. [2022-01-18 17:48:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:48:40,488 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:48:40,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:48:40,505 INFO L225 Difference]: With dead ends: 8027 [2022-01-18 17:48:40,505 INFO L226 Difference]: Without dead ends: 8000 [2022-01-18 17:48:40,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=720, Invalid=3312, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:48:40,506 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 340 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 548 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:48:40,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 359 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 869 Invalid, 0 Unknown, 548 Unchecked, 0.4s Time] [2022-01-18 17:48:40,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8000 states. [2022-01-18 17:48:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8000 to 4709. [2022-01-18 17:48:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4709 states, 4708 states have (on average 3.6319031435853866) internal successors, (17099), 4708 states have internal predecessors, (17099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:40,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 17099 transitions. [2022-01-18 17:48:40,609 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 17099 transitions. Word has length 26 [2022-01-18 17:48:40,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:48:40,609 INFO L470 AbstractCegarLoop]: Abstraction has 4709 states and 17099 transitions. [2022-01-18 17:48:40,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:40,610 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 17099 transitions. [2022-01-18 17:48:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:48:40,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:48:40,617 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] [2022-01-18 17:48:40,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-01-18 17:48:40,817 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 [2022-01-18 17:48:40,817 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:48:40,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:48:40,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1881371608, now seen corresponding path program 59 times [2022-01-18 17:48:40,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:48:40,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089936039] [2022-01-18 17:48:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:48:40,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:48:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:40,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:48:40,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089936039] [2022-01-18 17:48:40,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089936039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:48:40,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012753682] [2022-01-18 17:48:40,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:48:40,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:40,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:48:40,972 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) [2022-01-18 17:48:40,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 17:48:40,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:48:40,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:48:41,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 17:48:41,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:48:41,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:41,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:48:41,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 17:48:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:41,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:48:41,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:41,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:48:41,462 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 21 treesize of output 56 [2022-01-18 17:48:41,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:41,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:41,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:48:41,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:48:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:41,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012753682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:41,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:41,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:48:41,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627389640] [2022-01-18 17:48:41,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:41,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:48:41,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:41,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:48:41,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:48:41,850 INFO L87 Difference]: Start difference. First operand 4709 states and 17099 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-01-18 17:48:45,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:48:45,753 INFO L93 Difference]: Finished difference Result 9704 states and 33509 transitions. [2022-01-18 17:48:45,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 17:48:45,753 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 [2022-01-18 17:48:45,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:48:45,775 INFO L225 Difference]: With dead ends: 9704 [2022-01-18 17:48:45,775 INFO L226 Difference]: Without dead ends: 9674 [2022-01-18 17:48:45,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3541 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1437, Invalid=7683, Unknown=0, NotChecked=0, Total=9120 [2022-01-18 17:48:45,776 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 369 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 2292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 956 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:48:45,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 536 Invalid, 2292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1270 Invalid, 0 Unknown, 956 Unchecked, 0.7s Time] [2022-01-18 17:48:45,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9674 states. [2022-01-18 17:48:45,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9674 to 4733. [2022-01-18 17:48:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4733 states, 4732 states have (on average 3.6377852916314453) internal successors, (17214), 4732 states have internal predecessors, (17214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4733 states to 4733 states and 17214 transitions. [2022-01-18 17:48:45,893 INFO L78 Accepts]: Start accepts. Automaton has 4733 states and 17214 transitions. Word has length 26 [2022-01-18 17:48:45,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:48:45,893 INFO L470 AbstractCegarLoop]: Abstraction has 4733 states and 17214 transitions. [2022-01-18 17:48:45,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-01-18 17:48:45,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4733 states and 17214 transitions. [2022-01-18 17:48:45,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:48:45,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:48:45,901 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] [2022-01-18 17:48:45,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-01-18 17:48:46,101 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 [2022-01-18 17:48:46,101 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:48:46,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:48:46,102 INFO L85 PathProgramCache]: Analyzing trace with hash -366047686, now seen corresponding path program 60 times [2022-01-18 17:48:46,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:48:46,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912459574] [2022-01-18 17:48:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:48:46,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:48:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:46,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:48:46,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912459574] [2022-01-18 17:48:46,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912459574] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:48:46,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687154073] [2022-01-18 17:48:46,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:48:46,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:46,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:48:46,292 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) [2022-01-18 17:48:46,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 17:48:46,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:48:46,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:48:46,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:48:46,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:48:46,632 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 17:48:46,632 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 68 [2022-01-18 17:48:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:46,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:48:47,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:48:47,047 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 38 treesize of output 71 [2022-01-18 17:48:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:47,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687154073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:47,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:47,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-01-18 17:48:47,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455282024] [2022-01-18 17:48:47,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:47,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:48:47,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:47,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:48:47,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:48:47,993 INFO L87 Difference]: Start difference. First operand 4733 states and 17214 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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) [2022-01-18 17:48:51,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:48:51,628 INFO L93 Difference]: Finished difference Result 9076 states and 30926 transitions. [2022-01-18 17:48:51,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 17:48:51,628 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 26 [2022-01-18 17:48:51,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:48:51,647 INFO L225 Difference]: With dead ends: 9076 [2022-01-18 17:48:51,647 INFO L226 Difference]: Without dead ends: 9040 [2022-01-18 17:48:51,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=960, Invalid=5046, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 17:48:51,648 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 419 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1850 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 434 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:48:51,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 572 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1850 Invalid, 0 Unknown, 434 Unchecked, 0.9s Time] [2022-01-18 17:48:51,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9040 states. [2022-01-18 17:48:51,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9040 to 4724. [2022-01-18 17:48:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4724 states, 4723 states have (on average 3.6351894982002966) internal successors, (17169), 4723 states have internal predecessors, (17169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:51,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 17169 transitions. [2022-01-18 17:48:51,760 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 17169 transitions. Word has length 26 [2022-01-18 17:48:51,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:48:51,760 INFO L470 AbstractCegarLoop]: Abstraction has 4724 states and 17169 transitions. [2022-01-18 17:48:51,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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) [2022-01-18 17:48:51,761 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 17169 transitions. [2022-01-18 17:48:51,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:48:51,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:48:51,768 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] [2022-01-18 17:48:51,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-01-18 17:48:51,968 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 [2022-01-18 17:48:51,968 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:48:51,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:48:51,969 INFO L85 PathProgramCache]: Analyzing trace with hash 191428704, now seen corresponding path program 61 times [2022-01-18 17:48:51,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:48:51,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969329773] [2022-01-18 17:48:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:48:51,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:48:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:52,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:48:52,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969329773] [2022-01-18 17:48:52,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969329773] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:48:52,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301537850] [2022-01-18 17:48:52,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:48:52,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:52,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:48:52,164 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) [2022-01-18 17:48:52,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 17:48:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:52,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:48:52,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:48:52,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:52,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:48:52,426 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 22 treesize of output 30 [2022-01-18 17:48:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:52,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:48:52,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:48:52,744 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 37 treesize of output 70 [2022-01-18 17:48:53,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:53,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301537850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:53,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:53,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-18 17:48:53,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559607438] [2022-01-18 17:48:53,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:53,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:48:53,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:53,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:48:53,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:48:53,723 INFO L87 Difference]: Start difference. First operand 4724 states and 17169 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:56,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:48:56,593 INFO L93 Difference]: Finished difference Result 8456 states and 28732 transitions. [2022-01-18 17:48:56,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:48:56,593 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:48:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:48:56,611 INFO L225 Difference]: With dead ends: 8456 [2022-01-18 17:48:56,611 INFO L226 Difference]: Without dead ends: 8380 [2022-01-18 17:48:56,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=876, Invalid=3816, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:48:56,612 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 356 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:48:56,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 389 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 893 Invalid, 0 Unknown, 393 Unchecked, 0.5s Time] [2022-01-18 17:48:56,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8380 states. [2022-01-18 17:48:56,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8380 to 4717. [2022-01-18 17:48:56,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4717 states, 4716 states have (on average 3.639100932994063) internal successors, (17162), 4716 states have internal predecessors, (17162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4717 states to 4717 states and 17162 transitions. [2022-01-18 17:48:56,717 INFO L78 Accepts]: Start accepts. Automaton has 4717 states and 17162 transitions. Word has length 26 [2022-01-18 17:48:56,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:48:56,717 INFO L470 AbstractCegarLoop]: Abstraction has 4717 states and 17162 transitions. [2022-01-18 17:48:56,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:56,717 INFO L276 IsEmpty]: Start isEmpty. Operand 4717 states and 17162 transitions. [2022-01-18 17:48:56,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:48:56,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:48:56,724 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:48:56,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-01-18 17:48:56,924 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 [2022-01-18 17:48:56,925 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:48:56,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:48:56,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1205769994, now seen corresponding path program 56 times [2022-01-18 17:48:56,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:48:56,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110899548] [2022-01-18 17:48:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:48:56,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:48:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:57,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:48:57,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110899548] [2022-01-18 17:48:57,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110899548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:48:57,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514066653] [2022-01-18 17:48:57,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:48:57,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:57,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:48:57,074 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) [2022-01-18 17:48:57,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 17:48:57,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:48:57,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:48:57,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:48:57,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:48:57,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:57,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:57,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:48:57,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:48:57,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-01-18 17:48:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:57,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:48:57,578 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:48:57,578 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 47 [2022-01-18 17:48:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:48:57,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514066653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:57,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:57,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-01-18 17:48:57,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408679800] [2022-01-18 17:48:57,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:57,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:48:57,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:57,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:48:57,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:48:57,735 INFO L87 Difference]: Start difference. First operand 4717 states and 17162 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:00,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:49:00,561 INFO L93 Difference]: Finished difference Result 7064 states and 24569 transitions. [2022-01-18 17:49:00,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 17:49:00,562 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:49:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:49:00,577 INFO L225 Difference]: With dead ends: 7064 [2022-01-18 17:49:00,577 INFO L226 Difference]: Without dead ends: 7006 [2022-01-18 17:49:00,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2200 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1100, Invalid=5872, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 17:49:00,578 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 253 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 2037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:49:00,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 538 Invalid, 2037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:49:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7006 states. [2022-01-18 17:49:00,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7006 to 4725. [2022-01-18 17:49:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4725 states, 4724 states have (on average 3.63653683319221) internal successors, (17179), 4724 states have internal predecessors, (17179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4725 states to 4725 states and 17179 transitions. [2022-01-18 17:49:00,696 INFO L78 Accepts]: Start accepts. Automaton has 4725 states and 17179 transitions. Word has length 26 [2022-01-18 17:49:00,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:49:00,696 INFO L470 AbstractCegarLoop]: Abstraction has 4725 states and 17179 transitions. [2022-01-18 17:49:00,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:00,696 INFO L276 IsEmpty]: Start isEmpty. Operand 4725 states and 17179 transitions. [2022-01-18 17:49:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:49:00,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:49:00,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:49:00,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-01-18 17:49:00,904 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 [2022-01-18 17:49:00,904 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:49:00,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:49:00,905 INFO L85 PathProgramCache]: Analyzing trace with hash -280276128, now seen corresponding path program 57 times [2022-01-18 17:49:00,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:49:00,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646373320] [2022-01-18 17:49:00,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:49:00,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:49:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:01,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:49:01,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646373320] [2022-01-18 17:49:01,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646373320] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:49:01,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670046838] [2022-01-18 17:49:01,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:49:01,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:49:01,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:49:01,068 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) [2022-01-18 17:49:01,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 17:49:01,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:49:01,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:49:01,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:49:01,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:49:01,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:49:01,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:49:01,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:01,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2022-01-18 17:49:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:01,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:49:01,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:01,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:01,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:01,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:01,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-18 17:49:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:01,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670046838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:49:01,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:49:01,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 17:49:01,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167340920] [2022-01-18 17:49:01,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:49:01,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:49:01,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:49:01,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:49:01,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:49:01,583 INFO L87 Difference]: Start difference. First operand 4725 states and 17179 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:02,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:49:02,280 INFO L93 Difference]: Finished difference Result 6033 states and 21472 transitions. [2022-01-18 17:49:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 17:49:02,280 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:49:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:49:02,293 INFO L225 Difference]: With dead ends: 6033 [2022-01-18 17:49:02,293 INFO L226 Difference]: Without dead ends: 5981 [2022-01-18 17:49:02,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 17:49:02,294 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 182 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:49:02,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 457 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 496 Invalid, 0 Unknown, 153 Unchecked, 0.2s Time] [2022-01-18 17:49:02,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5981 states. [2022-01-18 17:49:02,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5981 to 4778. [2022-01-18 17:49:02,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4778 states, 4777 states have (on average 3.633661293698974) internal successors, (17358), 4777 states have internal predecessors, (17358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:02,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4778 states to 4778 states and 17358 transitions. [2022-01-18 17:49:02,376 INFO L78 Accepts]: Start accepts. Automaton has 4778 states and 17358 transitions. Word has length 26 [2022-01-18 17:49:02,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:49:02,376 INFO L470 AbstractCegarLoop]: Abstraction has 4778 states and 17358 transitions. [2022-01-18 17:49:02,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:02,377 INFO L276 IsEmpty]: Start isEmpty. Operand 4778 states and 17358 transitions. [2022-01-18 17:49:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:49:02,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:49:02,384 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:49:02,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-01-18 17:49:02,584 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 [2022-01-18 17:49:02,585 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:49:02,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:49:02,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1193941528, now seen corresponding path program 58 times [2022-01-18 17:49:02,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:49:02,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884207693] [2022-01-18 17:49:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:49:02,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:49:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:02,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:49:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884207693] [2022-01-18 17:49:02,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884207693] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:49:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035155945] [2022-01-18 17:49:02,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:49:02,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:49:02,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:49:02,746 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) [2022-01-18 17:49:02,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 17:49:02,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:49:02,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:49:02,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:49:02,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:49:03,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:49:03,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:03,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:03,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 21 [2022-01-18 17:49:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:03,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:49:03,250 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:49:03,250 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 47 [2022-01-18 17:49:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:03,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035155945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:49:03,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:49:03,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-01-18 17:49:03,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263411638] [2022-01-18 17:49:03,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:49:03,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:49:03,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:49:03,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:49:03,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:49:03,430 INFO L87 Difference]: Start difference. First operand 4778 states and 17358 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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) [2022-01-18 17:49:07,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:49:07,808 INFO L93 Difference]: Finished difference Result 8015 states and 27403 transitions. [2022-01-18 17:49:07,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 17:49:07,809 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:49:07,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:49:07,825 INFO L225 Difference]: With dead ends: 8015 [2022-01-18 17:49:07,825 INFO L226 Difference]: Without dead ends: 7890 [2022-01-18 17:49:07,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4229 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1865, Invalid=10345, Unknown=0, NotChecked=0, Total=12210 [2022-01-18 17:49:07,826 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 294 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 2450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:49:07,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 529 Invalid, 2450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2268 Invalid, 0 Unknown, 104 Unchecked, 1.0s Time] [2022-01-18 17:49:07,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7890 states. [2022-01-18 17:49:07,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7890 to 4841. [2022-01-18 17:49:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4841 states, 4840 states have (on average 3.628512396694215) internal successors, (17562), 4840 states have internal predecessors, (17562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:07,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4841 states to 4841 states and 17562 transitions. [2022-01-18 17:49:07,928 INFO L78 Accepts]: Start accepts. Automaton has 4841 states and 17562 transitions. Word has length 26 [2022-01-18 17:49:07,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:49:07,928 INFO L470 AbstractCegarLoop]: Abstraction has 4841 states and 17562 transitions. [2022-01-18 17:49:07,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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) [2022-01-18 17:49:07,928 INFO L276 IsEmpty]: Start isEmpty. Operand 4841 states and 17562 transitions. [2022-01-18 17:49:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:49:07,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:49:07,936 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:49:07,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-01-18 17:49:08,137 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 [2022-01-18 17:49:08,138 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:49:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:49:08,138 INFO L85 PathProgramCache]: Analyzing trace with hash 375467984, now seen corresponding path program 59 times [2022-01-18 17:49:08,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:49:08,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416420582] [2022-01-18 17:49:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:49:08,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:49:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:08,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:49:08,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416420582] [2022-01-18 17:49:08,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416420582] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:49:08,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810716263] [2022-01-18 17:49:08,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:49:08,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:49:08,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:49:08,295 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) [2022-01-18 17:49:08,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 17:49:08,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:49:08,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:49:08,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:49:08,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:49:08,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:49:08,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:49:08,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:08,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2022-01-18 17:49:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:08,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:49:08,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:08,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:08,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:08,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:08,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-18 17:49:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:08,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810716263] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:49:08,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:49:08,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 17:49:08,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295219067] [2022-01-18 17:49:08,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:49:08,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:49:08,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:49:08,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:49:08,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:49:08,825 INFO L87 Difference]: Start difference. First operand 4841 states and 17562 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:10,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:49:10,663 INFO L93 Difference]: Finished difference Result 7445 states and 25744 transitions. [2022-01-18 17:49:10,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:49:10,663 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:49:10,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:49:10,679 INFO L225 Difference]: With dead ends: 7445 [2022-01-18 17:49:10,679 INFO L226 Difference]: Without dead ends: 7389 [2022-01-18 17:49:10,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=830, Invalid=3202, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:49:10,680 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 385 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:49:10,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 385 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1127 Invalid, 0 Unknown, 125 Unchecked, 0.5s Time] [2022-01-18 17:49:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7389 states. [2022-01-18 17:49:10,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7389 to 4897. [2022-01-18 17:49:10,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4897 states, 4896 states have (on average 3.631331699346405) internal successors, (17779), 4896 states have internal predecessors, (17779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4897 states to 4897 states and 17779 transitions. [2022-01-18 17:49:10,783 INFO L78 Accepts]: Start accepts. Automaton has 4897 states and 17779 transitions. Word has length 26 [2022-01-18 17:49:10,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:49:10,784 INFO L470 AbstractCegarLoop]: Abstraction has 4897 states and 17779 transitions. [2022-01-18 17:49:10,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:10,784 INFO L276 IsEmpty]: Start isEmpty. Operand 4897 states and 17779 transitions. [2022-01-18 17:49:10,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:49:10,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:49:10,791 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] [2022-01-18 17:49:10,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-01-18 17:49:10,992 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 [2022-01-18 17:49:10,992 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:49:10,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:49:10,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1074760440, now seen corresponding path program 62 times [2022-01-18 17:49:10,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:49:10,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614090651] [2022-01-18 17:49:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:49:10,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:49:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:11,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:49:11,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614090651] [2022-01-18 17:49:11,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614090651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:49:11,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328701700] [2022-01-18 17:49:11,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:49:11,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:49:11,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:49:11,134 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) [2022-01-18 17:49:11,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 17:49:11,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:49:11,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:49:11,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:49:11,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:49:11,410 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-01-18 17:49:11,410 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2022-01-18 17:49:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:11,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:49:11,658 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:49:11,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-01-18 17:49:11,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:11,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:11,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:11,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:49:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:12,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328701700] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:49:12,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:49:12,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-18 17:49:12,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906651085] [2022-01-18 17:49:12,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:49:12,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:49:12,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:49:12,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:49:12,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:49:12,009 INFO L87 Difference]: Start difference. First operand 4897 states and 17779 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:14,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:49:14,713 INFO L93 Difference]: Finished difference Result 8749 states and 29823 transitions. [2022-01-18 17:49:14,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:49:14,713 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:49:14,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:49:14,732 INFO L225 Difference]: With dead ends: 8749 [2022-01-18 17:49:14,732 INFO L226 Difference]: Without dead ends: 8719 [2022-01-18 17:49:14,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=728, Invalid=4822, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 17:49:14,733 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 320 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:49:14,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 429 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1962 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:49:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8719 states. [2022-01-18 17:49:14,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8719 to 4931. [2022-01-18 17:49:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 4930 states have (on average 3.6253549695740364) internal successors, (17873), 4930 states have internal predecessors, (17873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:14,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 17873 transitions. [2022-01-18 17:49:14,860 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 17873 transitions. Word has length 26 [2022-01-18 17:49:14,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:49:14,861 INFO L470 AbstractCegarLoop]: Abstraction has 4931 states and 17873 transitions. [2022-01-18 17:49:14,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:14,861 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 17873 transitions. [2022-01-18 17:49:14,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:49:14,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:49:14,868 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] [2022-01-18 17:49:14,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-01-18 17:49:15,069 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 [2022-01-18 17:49:15,069 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:49:15,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:49:15,070 INFO L85 PathProgramCache]: Analyzing trace with hash -87268828, now seen corresponding path program 63 times [2022-01-18 17:49:15,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:49:15,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405012918] [2022-01-18 17:49:15,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:49:15,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:49:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:15,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:49:15,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405012918] [2022-01-18 17:49:15,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405012918] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:49:15,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682993003] [2022-01-18 17:49:15,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:49:15,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:49:15,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:49:15,208 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) [2022-01-18 17:49:15,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 17:49:15,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:49:15,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:49:15,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:49:15,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:49:15,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:49:15,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:15,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-01-18 17:49:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:15,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:49:15,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:15,812 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 37 treesize of output 70 [2022-01-18 17:49:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:16,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682993003] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:49:16,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:49:16,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:49:16,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442329192] [2022-01-18 17:49:16,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:49:16,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:49:16,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:49:16,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:49:16,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:49:16,806 INFO L87 Difference]: Start difference. First operand 4931 states and 17873 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:19,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:49:19,117 INFO L93 Difference]: Finished difference Result 8474 states and 28894 transitions. [2022-01-18 17:49:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:49:19,117 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:49:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:49:19,134 INFO L225 Difference]: With dead ends: 8474 [2022-01-18 17:49:19,135 INFO L226 Difference]: Without dead ends: 8409 [2022-01-18 17:49:19,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=622, Invalid=3160, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:49:19,135 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 265 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:49:19,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 288 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 585 Invalid, 0 Unknown, 519 Unchecked, 0.3s Time] [2022-01-18 17:49:19,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8409 states. [2022-01-18 17:49:19,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8409 to 4961. [2022-01-18 17:49:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4961 states, 4960 states have (on average 3.627016129032258) internal successors, (17990), 4960 states have internal predecessors, (17990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4961 states to 4961 states and 17990 transitions. [2022-01-18 17:49:19,241 INFO L78 Accepts]: Start accepts. Automaton has 4961 states and 17990 transitions. Word has length 26 [2022-01-18 17:49:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:49:19,241 INFO L470 AbstractCegarLoop]: Abstraction has 4961 states and 17990 transitions. [2022-01-18 17:49:19,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:19,242 INFO L276 IsEmpty]: Start isEmpty. Operand 4961 states and 17990 transitions. [2022-01-18 17:49:19,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:49:19,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:49:19,249 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] [2022-01-18 17:49:19,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-01-18 17:49:19,449 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 [2022-01-18 17:49:19,450 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:49:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:49:19,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1872123044, now seen corresponding path program 64 times [2022-01-18 17:49:19,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:49:19,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257851763] [2022-01-18 17:49:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:49:19,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:49:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:19,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:49:19,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257851763] [2022-01-18 17:49:19,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257851763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:49:19,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482523842] [2022-01-18 17:49:19,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:49:19,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:49:19,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:49:19,574 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) [2022-01-18 17:49:19,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 17:49:19,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:49:19,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:49:19,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:49:19,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:49:19,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:49:19,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:19,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-01-18 17:49:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:19,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:49:20,065 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:49:20,065 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 20 treesize of output 55 [2022-01-18 17:49:20,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:20,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:20,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:20,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:49:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:20,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482523842] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:49:20,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:49:20,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 17:49:20,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63860146] [2022-01-18 17:49:20,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:49:20,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:49:20,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:49:20,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:49:20,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:49:20,424 INFO L87 Difference]: Start difference. First operand 4961 states and 17990 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:21,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:49:21,222 INFO L93 Difference]: Finished difference Result 7140 states and 24665 transitions. [2022-01-18 17:49:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 17:49:21,223 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:49:21,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:49:21,238 INFO L225 Difference]: With dead ends: 7140 [2022-01-18 17:49:21,238 INFO L226 Difference]: Without dead ends: 7125 [2022-01-18 17:49:21,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 17:49:21,238 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 157 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:49:21,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 328 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 744 Invalid, 0 Unknown, 38 Unchecked, 0.3s Time] [2022-01-18 17:49:21,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7125 states. [2022-01-18 17:49:21,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7125 to 4993. [2022-01-18 17:49:21,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4993 states, 4992 states have (on average 3.6235977564102564) internal successors, (18089), 4992 states have internal predecessors, (18089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4993 states to 4993 states and 18089 transitions. [2022-01-18 17:49:21,337 INFO L78 Accepts]: Start accepts. Automaton has 4993 states and 18089 transitions. Word has length 26 [2022-01-18 17:49:21,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:49:21,338 INFO L470 AbstractCegarLoop]: Abstraction has 4993 states and 18089 transitions. [2022-01-18 17:49:21,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:21,338 INFO L276 IsEmpty]: Start isEmpty. Operand 4993 states and 18089 transitions. [2022-01-18 17:49:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:49:21,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:49:21,346 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] [2022-01-18 17:49:21,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-01-18 17:49:21,546 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 [2022-01-18 17:49:21,546 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:49:21,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:49:21,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1446158772, now seen corresponding path program 65 times [2022-01-18 17:49:21,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:49:21,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619376800] [2022-01-18 17:49:21,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:49:21,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:49:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:21,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:49:21,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619376800] [2022-01-18 17:49:21,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619376800] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:49:21,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755473043] [2022-01-18 17:49:21,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:49:21,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:49:21,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:49:21,717 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) [2022-01-18 17:49:21,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 17:49:21,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:49:21,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:49:21,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 17:49:21,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:49:22,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:49:22,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:22,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-18 17:49:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:22,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:49:22,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:22,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:22,321 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 20 treesize of output 55 [2022-01-18 17:49:22,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:22,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:22,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:22,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:49:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:22,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755473043] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:49:22,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:49:22,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-01-18 17:49:22,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366023463] [2022-01-18 17:49:22,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:49:22,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:49:22,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:49:22,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:49:22,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:49:22,751 INFO L87 Difference]: Start difference. First operand 4993 states and 18089 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-01-18 17:49:28,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:49:28,423 INFO L93 Difference]: Finished difference Result 16309 states and 54529 transitions. [2022-01-18 17:49:28,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-18 17:49:28,423 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:49:28,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:49:28,503 INFO L225 Difference]: With dead ends: 16309 [2022-01-18 17:49:28,504 INFO L226 Difference]: Without dead ends: 16252 [2022-01-18 17:49:28,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 39 SyntacticMatches, 17 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5007 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2099, Invalid=10333, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 17:49:28,504 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 399 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 746 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:49:28,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 551 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 960 Invalid, 0 Unknown, 746 Unchecked, 0.6s Time] [2022-01-18 17:49:28,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16252 states. [2022-01-18 17:49:28,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16252 to 5011. [2022-01-18 17:49:28,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5011 states, 5010 states have (on average 3.625748502994012) internal successors, (18165), 5010 states have internal predecessors, (18165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5011 states to 5011 states and 18165 transitions. [2022-01-18 17:49:28,669 INFO L78 Accepts]: Start accepts. Automaton has 5011 states and 18165 transitions. Word has length 26 [2022-01-18 17:49:28,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:49:28,669 INFO L470 AbstractCegarLoop]: Abstraction has 5011 states and 18165 transitions. [2022-01-18 17:49:28,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-01-18 17:49:28,669 INFO L276 IsEmpty]: Start isEmpty. Operand 5011 states and 18165 transitions. [2022-01-18 17:49:28,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:49:28,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:49:28,677 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] [2022-01-18 17:49:28,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-01-18 17:49:28,877 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 [2022-01-18 17:49:28,878 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:49:28,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:49:28,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1897695392, now seen corresponding path program 66 times [2022-01-18 17:49:28,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:49:28,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648349387] [2022-01-18 17:49:28,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:49:28,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:49:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:29,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:49:29,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648349387] [2022-01-18 17:49:29,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648349387] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:49:29,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494456506] [2022-01-18 17:49:29,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:49:29,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:49:29,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:49:29,059 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) [2022-01-18 17:49:29,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 17:49:29,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:49:29,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:49:29,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:49:29,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:49:29,341 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 17:49:29,341 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 62 [2022-01-18 17:49:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:29,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:49:30,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:30,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:30,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:30,178 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 38 treesize of output 55 [2022-01-18 17:49:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:30,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494456506] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:49:30,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:49:30,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 17:49:30,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411205301] [2022-01-18 17:49:30,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:49:30,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:49:30,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:49:30,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:49:30,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:49:30,505 INFO L87 Difference]: Start difference. First operand 5011 states and 18165 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:49:36,852 INFO L93 Difference]: Finished difference Result 9967 states and 34044 transitions. [2022-01-18 17:49:36,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-18 17:49:36,852 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:49:36,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:49:36,904 INFO L225 Difference]: With dead ends: 9967 [2022-01-18 17:49:36,904 INFO L226 Difference]: Without dead ends: 9952 [2022-01-18 17:49:36,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 42 SyntacticMatches, 15 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7109 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2176, Invalid=14854, Unknown=0, NotChecked=0, Total=17030 [2022-01-18 17:49:36,905 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 479 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1303 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:49:36,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 528 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1157 Invalid, 0 Unknown, 1303 Unchecked, 0.6s Time] [2022-01-18 17:49:36,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9952 states. [2022-01-18 17:49:36,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9952 to 5037. [2022-01-18 17:49:37,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5037 states, 5036 states have (on average 3.631254964257347) internal successors, (18287), 5036 states have internal predecessors, (18287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5037 states to 5037 states and 18287 transitions. [2022-01-18 17:49:37,014 INFO L78 Accepts]: Start accepts. Automaton has 5037 states and 18287 transitions. Word has length 26 [2022-01-18 17:49:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:49:37,015 INFO L470 AbstractCegarLoop]: Abstraction has 5037 states and 18287 transitions. [2022-01-18 17:49:37,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:37,015 INFO L276 IsEmpty]: Start isEmpty. Operand 5037 states and 18287 transitions. [2022-01-18 17:49:37,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:49:37,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:49:37,023 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] [2022-01-18 17:49:37,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-01-18 17:49:37,224 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 [2022-01-18 17:49:37,224 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:49:37,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:49:37,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1713979010, now seen corresponding path program 67 times [2022-01-18 17:49:37,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:49:37,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895495382] [2022-01-18 17:49:37,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:49:37,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:49:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:37,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:49:37,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895495382] [2022-01-18 17:49:37,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895495382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:49:37,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490361515] [2022-01-18 17:49:37,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:49:37,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:49:37,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:49:37,395 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) [2022-01-18 17:49:37,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 17:49:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:37,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 17:49:37,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:49:37,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:49:37,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:37,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 17:49:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:37,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:49:37,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:37,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:37,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 55 [2022-01-18 17:49:38,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:38,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:38,077 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:38,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-18 17:49:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:38,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490361515] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:49:38,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:49:38,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:49:38,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112344380] [2022-01-18 17:49:38,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:49:38,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:49:38,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:49:38,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:49:38,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:49:38,327 INFO L87 Difference]: Start difference. First operand 5037 states and 18287 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:40,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:49:40,724 INFO L93 Difference]: Finished difference Result 8705 states and 29599 transitions. [2022-01-18 17:49:40,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:49:40,724 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:49:40,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:49:40,743 INFO L225 Difference]: With dead ends: 8705 [2022-01-18 17:49:40,743 INFO L226 Difference]: Without dead ends: 8645 [2022-01-18 17:49:40,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=585, Invalid=2721, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 17:49:40,744 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 275 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 450 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:49:40,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 458 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1560 Invalid, 0 Unknown, 450 Unchecked, 0.7s Time] [2022-01-18 17:49:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8645 states. [2022-01-18 17:49:40,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8645 to 5078. [2022-01-18 17:49:40,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5078 states, 5077 states have (on average 3.629899546976561) internal successors, (18429), 5077 states have internal predecessors, (18429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5078 states to 5078 states and 18429 transitions. [2022-01-18 17:49:40,859 INFO L78 Accepts]: Start accepts. Automaton has 5078 states and 18429 transitions. Word has length 26 [2022-01-18 17:49:40,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:49:40,859 INFO L470 AbstractCegarLoop]: Abstraction has 5078 states and 18429 transitions. [2022-01-18 17:49:40,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:40,859 INFO L276 IsEmpty]: Start isEmpty. Operand 5078 states and 18429 transitions. [2022-01-18 17:49:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:49:40,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:49:40,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:49:40,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-01-18 17:49:41,069 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 [2022-01-18 17:49:41,069 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:49:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:49:41,069 INFO L85 PathProgramCache]: Analyzing trace with hash -756469736, now seen corresponding path program 60 times [2022-01-18 17:49:41,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:49:41,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953530284] [2022-01-18 17:49:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:49:41,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:49:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:41,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:49:41,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953530284] [2022-01-18 17:49:41,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953530284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:49:41,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786755828] [2022-01-18 17:49:41,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:49:41,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:49:41,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:49:41,294 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) [2022-01-18 17:49:41,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 17:49:41,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:49:41,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:49:41,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:49:41,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:49:41,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:49:41,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:49:41,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:49:41,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:41,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 48 [2022-01-18 17:49:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:41,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:49:41,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:41,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:41,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:41,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:41,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-18 17:49:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:41,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786755828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:49:41,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:49:41,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 17:49:41,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613084965] [2022-01-18 17:49:41,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:49:41,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:49:41,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:49:41,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:49:41,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:49:41,906 INFO L87 Difference]: Start difference. First operand 5078 states and 18429 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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) [2022-01-18 17:49:42,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:49:42,663 INFO L93 Difference]: Finished difference Result 5510 states and 19667 transitions. [2022-01-18 17:49:42,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:49:42,664 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:49:42,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:49:42,675 INFO L225 Difference]: With dead ends: 5510 [2022-01-18 17:49:42,675 INFO L226 Difference]: Without dead ends: 5480 [2022-01-18 17:49:42,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=460, Invalid=2402, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 17:49:42,676 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 151 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:49:42,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 312 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 307 Invalid, 0 Unknown, 236 Unchecked, 0.2s Time] [2022-01-18 17:49:42,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5480 states. [2022-01-18 17:49:42,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5480 to 5104. [2022-01-18 17:49:42,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5104 states, 5103 states have (on average 3.6304134822653342) internal successors, (18526), 5103 states have internal predecessors, (18526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:42,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5104 states to 5104 states and 18526 transitions. [2022-01-18 17:49:42,758 INFO L78 Accepts]: Start accepts. Automaton has 5104 states and 18526 transitions. Word has length 26 [2022-01-18 17:49:42,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:49:42,758 INFO L470 AbstractCegarLoop]: Abstraction has 5104 states and 18526 transitions. [2022-01-18 17:49:42,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 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) [2022-01-18 17:49:42,758 INFO L276 IsEmpty]: Start isEmpty. Operand 5104 states and 18526 transitions. [2022-01-18 17:49:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:49:42,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:49:42,766 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:49:42,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-01-18 17:49:42,968 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 [2022-01-18 17:49:42,968 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:49:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:49:42,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1678171876, now seen corresponding path program 61 times [2022-01-18 17:49:42,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:49:42,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490087811] [2022-01-18 17:49:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:49:42,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:49:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:43,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:49:43,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490087811] [2022-01-18 17:49:43,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490087811] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:49:43,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278456863] [2022-01-18 17:49:43,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:49:43,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:49:43,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:49:43,171 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) [2022-01-18 17:49:43,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 17:49:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:43,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:49:43,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:49:43,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:49:43,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:49:43,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:43,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:43,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2022-01-18 17:49:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:43,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:49:43,616 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:49:43,616 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 47 [2022-01-18 17:49:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:43,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278456863] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:49:43,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:49:43,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-01-18 17:49:43,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587348835] [2022-01-18 17:49:43,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:49:43,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:49:43,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:49:43,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:49:43,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:49:43,949 INFO L87 Difference]: Start difference. First operand 5104 states and 18526 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:49:45,096 INFO L93 Difference]: Finished difference Result 6841 states and 24155 transitions. [2022-01-18 17:49:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 17:49:45,096 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:49:45,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:49:45,111 INFO L225 Difference]: With dead ends: 6841 [2022-01-18 17:49:45,111 INFO L226 Difference]: Without dead ends: 6811 [2022-01-18 17:49:45,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=389, Invalid=2367, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 17:49:45,111 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 144 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:49:45,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 441 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 982 Invalid, 0 Unknown, 218 Unchecked, 0.4s Time] [2022-01-18 17:49:45,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6811 states. [2022-01-18 17:49:45,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6811 to 5092. [2022-01-18 17:49:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5092 states, 5091 states have (on average 3.6311137301119625) internal successors, (18486), 5091 states have internal predecessors, (18486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:45,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5092 states to 5092 states and 18486 transitions. [2022-01-18 17:49:45,205 INFO L78 Accepts]: Start accepts. Automaton has 5092 states and 18486 transitions. Word has length 26 [2022-01-18 17:49:45,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:49:45,205 INFO L470 AbstractCegarLoop]: Abstraction has 5092 states and 18486 transitions. [2022-01-18 17:49:45,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:45,205 INFO L276 IsEmpty]: Start isEmpty. Operand 5092 states and 18486 transitions. [2022-01-18 17:49:45,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:49:45,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:49:45,213 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] [2022-01-18 17:49:45,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-01-18 17:49:45,414 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 [2022-01-18 17:49:45,414 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:49:45,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:49:45,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1326090780, now seen corresponding path program 62 times [2022-01-18 17:49:45,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:49:45,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472241939] [2022-01-18 17:49:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:49:45,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:49:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:45,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:49:45,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472241939] [2022-01-18 17:49:45,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472241939] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:49:45,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867745041] [2022-01-18 17:49:45,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:49:45,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:49:45,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:49:45,580 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) [2022-01-18 17:49:45,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 17:49:45,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:49:45,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:49:45,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:49:45,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:49:45,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:45,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:49:45,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:49:45,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:49:45,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-01-18 17:49:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:45,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:49:46,042 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:49:46,043 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 47 [2022-01-18 17:49:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:46,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867745041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:49:46,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:49:46,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-01-18 17:49:46,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169847171] [2022-01-18 17:49:46,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:49:46,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:49:46,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:49:46,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:49:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:49:46,440 INFO L87 Difference]: Start difference. First operand 5092 states and 18486 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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) [2022-01-18 17:49:48,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:49:48,669 INFO L93 Difference]: Finished difference Result 7334 states and 25843 transitions. [2022-01-18 17:49:48,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 17:49:48,669 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:49:48,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:49:48,685 INFO L225 Difference]: With dead ends: 7334 [2022-01-18 17:49:48,685 INFO L226 Difference]: Without dead ends: 7319 [2022-01-18 17:49:48,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=650, Invalid=3010, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:49:48,686 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 221 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:49:48,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 389 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1144 Invalid, 0 Unknown, 392 Unchecked, 0.5s Time] [2022-01-18 17:49:48,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7319 states. [2022-01-18 17:49:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7319 to 5037. [2022-01-18 17:49:48,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5037 states, 5036 states have (on average 3.6280778395552025) internal successors, (18271), 5036 states have internal predecessors, (18271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5037 states to 5037 states and 18271 transitions. [2022-01-18 17:49:48,784 INFO L78 Accepts]: Start accepts. Automaton has 5037 states and 18271 transitions. Word has length 26 [2022-01-18 17:49:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:49:48,784 INFO L470 AbstractCegarLoop]: Abstraction has 5037 states and 18271 transitions. [2022-01-18 17:49:48,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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) [2022-01-18 17:49:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 5037 states and 18271 transitions. [2022-01-18 17:49:48,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:49:48,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:49:48,792 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] [2022-01-18 17:49:48,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-01-18 17:49:48,992 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 [2022-01-18 17:49:48,992 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:49:48,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:49:48,992 INFO L85 PathProgramCache]: Analyzing trace with hash 856703750, now seen corresponding path program 68 times [2022-01-18 17:49:48,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:49:48,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982885276] [2022-01-18 17:49:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:49:48,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:49:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:49,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:49:49,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982885276] [2022-01-18 17:49:49,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982885276] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:49:49,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595588453] [2022-01-18 17:49:49,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:49:49,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:49:49,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:49:49,154 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) [2022-01-18 17:49:49,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 17:49:49,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:49:49,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:49:49,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:49:49,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:49:49,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:49:49,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:49,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2022-01-18 17:49:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:49,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:49:49,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:49:49,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 70 [2022-01-18 17:49:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:50,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595588453] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:49:50,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:49:50,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-18 17:49:50,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444843416] [2022-01-18 17:49:50,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:49:50,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:49:50,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:49:50,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:49:50,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:49:50,661 INFO L87 Difference]: Start difference. First operand 5037 states and 18271 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:54,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:49:54,076 INFO L93 Difference]: Finished difference Result 11364 states and 38156 transitions. [2022-01-18 17:49:54,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 17:49:54,076 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:49:54,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:49:54,100 INFO L225 Difference]: With dead ends: 11364 [2022-01-18 17:49:54,100 INFO L226 Difference]: Without dead ends: 11271 [2022-01-18 17:49:54,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1888 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=835, Invalid=4715, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 17:49:54,101 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 266 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:49:54,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 434 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 711 Invalid, 0 Unknown, 528 Unchecked, 0.4s Time] [2022-01-18 17:49:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11271 states. [2022-01-18 17:49:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11271 to 5009. [2022-01-18 17:49:54,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5009 states, 5008 states have (on average 3.626597444089457) internal successors, (18162), 5008 states have internal predecessors, (18162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:54,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5009 states to 5009 states and 18162 transitions. [2022-01-18 17:49:54,236 INFO L78 Accepts]: Start accepts. Automaton has 5009 states and 18162 transitions. Word has length 26 [2022-01-18 17:49:54,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:49:54,236 INFO L470 AbstractCegarLoop]: Abstraction has 5009 states and 18162 transitions. [2022-01-18 17:49:54,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 5009 states and 18162 transitions. [2022-01-18 17:49:54,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:49:54,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:49:54,244 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] [2022-01-18 17:49:54,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-01-18 17:49:54,444 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 [2022-01-18 17:49:54,444 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:49:54,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:49:54,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1754023866, now seen corresponding path program 69 times [2022-01-18 17:49:54,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:49:54,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789196223] [2022-01-18 17:49:54,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:49:54,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:49:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:54,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:49:54,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789196223] [2022-01-18 17:49:54,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789196223] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:49:54,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418672440] [2022-01-18 17:49:54,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:49:54,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:49:54,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:49:54,489 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) [2022-01-18 17:49:54,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 17:49:54,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:49:54,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:49:54,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:49:54,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:49:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:54,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:49:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:54,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418672440] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:49:54,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:49:54,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 17:49:54,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751512015] [2022-01-18 17:49:54,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:49:54,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:49:54,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:49:54,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:49:54,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:49:54,761 INFO L87 Difference]: Start difference. First operand 5009 states and 18162 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) [2022-01-18 17:49:57,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:49:57,541 INFO L93 Difference]: Finished difference Result 12590 states and 40846 transitions. [2022-01-18 17:49:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-01-18 17:49:57,541 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 28 [2022-01-18 17:49:57,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:49:57,570 INFO L225 Difference]: With dead ends: 12590 [2022-01-18 17:49:57,570 INFO L226 Difference]: Without dead ends: 12590 [2022-01-18 17:49:57,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11198 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4782, Invalid=21300, Unknown=0, NotChecked=0, Total=26082 [2022-01-18 17:49:57,573 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 718 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:49:57,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 673 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:49:57,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12590 states. [2022-01-18 17:49:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12590 to 5439. [2022-01-18 17:49:57,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5439 states, 5438 states have (on average 3.690327326222876) internal successors, (20068), 5438 states have internal predecessors, (20068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:57,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5439 states to 5439 states and 20068 transitions. [2022-01-18 17:49:57,758 INFO L78 Accepts]: Start accepts. Automaton has 5439 states and 20068 transitions. Word has length 28 [2022-01-18 17:49:57,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:49:57,758 INFO L470 AbstractCegarLoop]: Abstraction has 5439 states and 20068 transitions. [2022-01-18 17:49:57,758 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) [2022-01-18 17:49:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 5439 states and 20068 transitions. [2022-01-18 17:49:57,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:49:57,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:49:57,766 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] [2022-01-18 17:49:57,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-01-18 17:49:57,967 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 [2022-01-18 17:49:57,967 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:49:57,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:49:57,967 INFO L85 PathProgramCache]: Analyzing trace with hash 777705022, now seen corresponding path program 70 times [2022-01-18 17:49:57,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:49:57,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129474434] [2022-01-18 17:49:57,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:49:57,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:49:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:58,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:49:58,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129474434] [2022-01-18 17:49:58,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129474434] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:49:58,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447470961] [2022-01-18 17:49:58,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:49:58,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:49:58,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:49:58,012 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) [2022-01-18 17:49:58,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 17:49:58,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:49:58,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:49:58,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:49:58,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:49:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:58,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:49:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:49:58,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447470961] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:49:58,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:49:58,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 17:49:58,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613417722] [2022-01-18 17:49:58,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:49:58,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:49:58,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:49:58,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:49:58,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:49:58,289 INFO L87 Difference]: Start difference. First operand 5439 states and 20068 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) [2022-01-18 17:50:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:04,074 INFO L93 Difference]: Finished difference Result 16901 states and 54084 transitions. [2022-01-18 17:50:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2022-01-18 17:50:04,075 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 28 [2022-01-18 17:50:04,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:04,113 INFO L225 Difference]: With dead ends: 16901 [2022-01-18 17:50:04,113 INFO L226 Difference]: Without dead ends: 16901 [2022-01-18 17:50:04,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33756 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=12551, Invalid=62251, Unknown=0, NotChecked=0, Total=74802 [2022-01-18 17:50:04,117 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 965 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 2617 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 2822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 2617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:04,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [965 Valid, 886 Invalid, 2822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 2617 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 17:50:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16901 states. [2022-01-18 17:50:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16901 to 5488. [2022-01-18 17:50:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5488 states, 5487 states have (on average 3.7020229633679604) internal successors, (20313), 5487 states have internal predecessors, (20313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:04,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5488 states to 5488 states and 20313 transitions. [2022-01-18 17:50:04,392 INFO L78 Accepts]: Start accepts. Automaton has 5488 states and 20313 transitions. Word has length 28 [2022-01-18 17:50:04,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:04,392 INFO L470 AbstractCegarLoop]: Abstraction has 5488 states and 20313 transitions. [2022-01-18 17:50:04,392 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) [2022-01-18 17:50:04,393 INFO L276 IsEmpty]: Start isEmpty. Operand 5488 states and 20313 transitions. [2022-01-18 17:50:04,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:04,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:04,401 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] [2022-01-18 17:50:04,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-01-18 17:50:04,601 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 [2022-01-18 17:50:04,602 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:04,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:04,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1344657102, now seen corresponding path program 71 times [2022-01-18 17:50:04,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:04,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244101890] [2022-01-18 17:50:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:04,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:04,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:04,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244101890] [2022-01-18 17:50:04,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244101890] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:04,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921287792] [2022-01-18 17:50:04,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:50:04,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:04,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:04,648 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) [2022-01-18 17:50:04,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 17:50:04,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:50:04,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:04,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:50:04,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:04,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:04,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921287792] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:04,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:04,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 17:50:04,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923284377] [2022-01-18 17:50:04,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:04,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:50:04,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:04,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:50:04,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:50:04,925 INFO L87 Difference]: Start difference. First operand 5488 states and 20313 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) [2022-01-18 17:50:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:08,750 INFO L93 Difference]: Finished difference Result 15449 states and 49832 transitions. [2022-01-18 17:50:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-01-18 17:50:08,751 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 28 [2022-01-18 17:50:08,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:08,785 INFO L225 Difference]: With dead ends: 15449 [2022-01-18 17:50:08,785 INFO L226 Difference]: Without dead ends: 15449 [2022-01-18 17:50:08,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16369 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6947, Invalid=30495, Unknown=0, NotChecked=0, Total=37442 [2022-01-18 17:50:08,788 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 862 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:08,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 817 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2318 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 17:50:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15449 states. [2022-01-18 17:50:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15449 to 5354. [2022-01-18 17:50:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5354 states, 5353 states have (on average 3.6775639828133757) internal successors, (19686), 5353 states have internal predecessors, (19686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:08,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5354 states to 5354 states and 19686 transitions. [2022-01-18 17:50:08,971 INFO L78 Accepts]: Start accepts. Automaton has 5354 states and 19686 transitions. Word has length 28 [2022-01-18 17:50:08,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:08,971 INFO L470 AbstractCegarLoop]: Abstraction has 5354 states and 19686 transitions. [2022-01-18 17:50:08,971 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) [2022-01-18 17:50:08,971 INFO L276 IsEmpty]: Start isEmpty. Operand 5354 states and 19686 transitions. [2022-01-18 17:50:08,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:08,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:08,979 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] [2022-01-18 17:50:08,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-01-18 17:50:09,180 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 [2022-01-18 17:50:09,180 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:09,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:09,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1768281872, now seen corresponding path program 72 times [2022-01-18 17:50:09,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:09,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542056981] [2022-01-18 17:50:09,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:09,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:09,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:09,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542056981] [2022-01-18 17:50:09,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542056981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:09,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051139883] [2022-01-18 17:50:09,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:50:09,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:09,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:09,225 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) [2022-01-18 17:50:09,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 17:50:09,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:50:09,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:09,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:50:09,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:09,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:09,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051139883] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:09,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:09,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 17:50:09,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405451306] [2022-01-18 17:50:09,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:09,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:50:09,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:09,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:50:09,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:50:09,508 INFO L87 Difference]: Start difference. First operand 5354 states and 19686 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) [2022-01-18 17:50:12,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:12,279 INFO L93 Difference]: Finished difference Result 12555 states and 40750 transitions. [2022-01-18 17:50:12,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-18 17:50:12,279 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 28 [2022-01-18 17:50:12,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:12,345 INFO L225 Difference]: With dead ends: 12555 [2022-01-18 17:50:12,345 INFO L226 Difference]: Without dead ends: 12555 [2022-01-18 17:50:12,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10124 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4362, Invalid=20444, Unknown=0, NotChecked=0, Total=24806 [2022-01-18 17:50:12,346 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 648 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 2006 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:12,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 694 Invalid, 2148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2006 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:50:12,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12555 states. [2022-01-18 17:50:12,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12555 to 5328. [2022-01-18 17:50:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5328 states, 5327 states have (on average 3.672423502909705) internal successors, (19563), 5327 states have internal predecessors, (19563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5328 states to 5328 states and 19563 transitions. [2022-01-18 17:50:12,496 INFO L78 Accepts]: Start accepts. Automaton has 5328 states and 19563 transitions. Word has length 28 [2022-01-18 17:50:12,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:12,496 INFO L470 AbstractCegarLoop]: Abstraction has 5328 states and 19563 transitions. [2022-01-18 17:50:12,496 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) [2022-01-18 17:50:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 5328 states and 19563 transitions. [2022-01-18 17:50:12,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:12,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:12,505 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] [2022-01-18 17:50:12,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-01-18 17:50:12,705 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 [2022-01-18 17:50:12,705 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:12,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:12,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1317055158, now seen corresponding path program 63 times [2022-01-18 17:50:12,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:12,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671218821] [2022-01-18 17:50:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:12,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:12,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:12,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671218821] [2022-01-18 17:50:12,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671218821] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:12,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867636483] [2022-01-18 17:50:12,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:50:12,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:12,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:12,750 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) [2022-01-18 17:50:12,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 17:50:12,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:50:12,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:12,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:50:12,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:12,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:12,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867636483] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:12,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:12,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 17:50:12,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24109561] [2022-01-18 17:50:12,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:12,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:50:12,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:12,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:50:12,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:50:12,974 INFO L87 Difference]: Start difference. First operand 5328 states and 19563 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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) [2022-01-18 17:50:14,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:14,467 INFO L93 Difference]: Finished difference Result 11126 states and 36778 transitions. [2022-01-18 17:50:14,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 17:50:14,468 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 28 [2022-01-18 17:50:14,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:14,491 INFO L225 Difference]: With dead ends: 11126 [2022-01-18 17:50:14,491 INFO L226 Difference]: Without dead ends: 11126 [2022-01-18 17:50:14,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1577, Invalid=6795, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 17:50:14,491 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 490 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:14,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 517 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:50:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11126 states. [2022-01-18 17:50:14,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11126 to 5378. [2022-01-18 17:50:14,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5378 states, 5377 states have (on average 3.6656127952389808) internal successors, (19710), 5377 states have internal predecessors, (19710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5378 states to 5378 states and 19710 transitions. [2022-01-18 17:50:14,632 INFO L78 Accepts]: Start accepts. Automaton has 5378 states and 19710 transitions. Word has length 28 [2022-01-18 17:50:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:14,632 INFO L470 AbstractCegarLoop]: Abstraction has 5378 states and 19710 transitions. [2022-01-18 17:50:14,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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) [2022-01-18 17:50:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 5378 states and 19710 transitions. [2022-01-18 17:50:14,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:14,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:14,641 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] [2022-01-18 17:50:14,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-01-18 17:50:14,841 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 [2022-01-18 17:50:14,841 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:14,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:14,841 INFO L85 PathProgramCache]: Analyzing trace with hash 738717818, now seen corresponding path program 73 times [2022-01-18 17:50:14,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:14,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121598647] [2022-01-18 17:50:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:14,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:14,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:14,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121598647] [2022-01-18 17:50:14,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121598647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:14,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526228468] [2022-01-18 17:50:14,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:50:14,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:14,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:14,878 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) [2022-01-18 17:50:14,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 17:50:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:14,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:50:14,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:14,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:15,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526228468] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:15,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:15,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 17:50:15,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017139877] [2022-01-18 17:50:15,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:15,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:50:15,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:15,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:50:15,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:50:15,087 INFO L87 Difference]: Start difference. First operand 5378 states and 19710 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:16,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:16,770 INFO L93 Difference]: Finished difference Result 12267 states and 41359 transitions. [2022-01-18 17:50:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-18 17:50:16,771 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:50:16,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:16,800 INFO L225 Difference]: With dead ends: 12267 [2022-01-18 17:50:16,800 INFO L226 Difference]: Without dead ends: 12203 [2022-01-18 17:50:16,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4599 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2755, Invalid=8801, Unknown=0, NotChecked=0, Total=11556 [2022-01-18 17:50:16,801 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 660 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:16,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 270 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:50:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12203 states. [2022-01-18 17:50:16,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12203 to 6423. [2022-01-18 17:50:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6423 states, 6422 states have (on average 3.7877608221737775) internal successors, (24325), 6422 states have internal predecessors, (24325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:17,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6423 states to 6423 states and 24325 transitions. [2022-01-18 17:50:17,010 INFO L78 Accepts]: Start accepts. Automaton has 6423 states and 24325 transitions. Word has length 28 [2022-01-18 17:50:17,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:17,010 INFO L470 AbstractCegarLoop]: Abstraction has 6423 states and 24325 transitions. [2022-01-18 17:50:17,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:17,010 INFO L276 IsEmpty]: Start isEmpty. Operand 6423 states and 24325 transitions. [2022-01-18 17:50:17,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:17,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:17,022 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] [2022-01-18 17:50:17,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-01-18 17:50:17,222 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 [2022-01-18 17:50:17,222 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:17,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:17,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1738509770, now seen corresponding path program 74 times [2022-01-18 17:50:17,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:17,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718203388] [2022-01-18 17:50:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:17,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:17,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:17,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718203388] [2022-01-18 17:50:17,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718203388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:17,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094147610] [2022-01-18 17:50:17,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:50:17,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:17,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:17,254 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) [2022-01-18 17:50:17,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 17:50:17,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:50:17,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:17,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:50:17,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:17,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:17,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094147610] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:17,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:17,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 17:50:17,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388144505] [2022-01-18 17:50:17,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:17,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:50:17,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:17,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:50:17,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:50:17,427 INFO L87 Difference]: Start difference. First operand 6423 states and 24325 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:17,672 INFO L93 Difference]: Finished difference Result 8764 states and 31163 transitions. [2022-01-18 17:50:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 17:50:17,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:50:17,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:17,691 INFO L225 Difference]: With dead ends: 8764 [2022-01-18 17:50:17,691 INFO L226 Difference]: Without dead ends: 8669 [2022-01-18 17:50:17,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:50:17,692 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 205 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:17,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 75 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:50:17,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8669 states. [2022-01-18 17:50:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8669 to 6429. [2022-01-18 17:50:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6429 states, 6428 states have (on average 3.7762912258867454) internal successors, (24274), 6428 states have internal predecessors, (24274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6429 states to 6429 states and 24274 transitions. [2022-01-18 17:50:17,878 INFO L78 Accepts]: Start accepts. Automaton has 6429 states and 24274 transitions. Word has length 28 [2022-01-18 17:50:17,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:17,878 INFO L470 AbstractCegarLoop]: Abstraction has 6429 states and 24274 transitions. [2022-01-18 17:50:17,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:17,878 INFO L276 IsEmpty]: Start isEmpty. Operand 6429 states and 24274 transitions. [2022-01-18 17:50:17,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:17,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:17,889 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] [2022-01-18 17:50:17,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-01-18 17:50:18,090 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 [2022-01-18 17:50:18,090 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:18,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:18,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1718584438, now seen corresponding path program 64 times [2022-01-18 17:50:18,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:18,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941963784] [2022-01-18 17:50:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:18,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:18,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:18,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941963784] [2022-01-18 17:50:18,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941963784] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:18,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847103059] [2022-01-18 17:50:18,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:50:18,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:18,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:18,133 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) [2022-01-18 17:50:18,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 17:50:18,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:50:18,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:18,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:50:18,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:18,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:18,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847103059] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:18,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:18,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 17:50:18,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325243233] [2022-01-18 17:50:18,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:18,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:50:18,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:18,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:50:18,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:50:18,326 INFO L87 Difference]: Start difference. First operand 6429 states and 24274 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-01-18 17:50:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:18,960 INFO L93 Difference]: Finished difference Result 10862 states and 39021 transitions. [2022-01-18 17:50:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:50:18,961 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 28 [2022-01-18 17:50:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:18,985 INFO L225 Difference]: With dead ends: 10862 [2022-01-18 17:50:18,985 INFO L226 Difference]: Without dead ends: 10728 [2022-01-18 17:50:18,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 17:50:18,986 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 376 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:18,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 210 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:50:18,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10728 states. [2022-01-18 17:50:19,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10728 to 7624. [2022-01-18 17:50:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7624 states, 7623 states have (on average 3.8049324412960774) internal successors, (29005), 7623 states have internal predecessors, (29005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:19,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7624 states to 7624 states and 29005 transitions. [2022-01-18 17:50:19,165 INFO L78 Accepts]: Start accepts. Automaton has 7624 states and 29005 transitions. Word has length 28 [2022-01-18 17:50:19,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:19,166 INFO L470 AbstractCegarLoop]: Abstraction has 7624 states and 29005 transitions. [2022-01-18 17:50:19,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-01-18 17:50:19,166 INFO L276 IsEmpty]: Start isEmpty. Operand 7624 states and 29005 transitions. [2022-01-18 17:50:19,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:19,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:19,179 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] [2022-01-18 17:50:19,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-01-18 17:50:19,379 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 [2022-01-18 17:50:19,379 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:19,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:19,379 INFO L85 PathProgramCache]: Analyzing trace with hash -2020160002, now seen corresponding path program 75 times [2022-01-18 17:50:19,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:19,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272892236] [2022-01-18 17:50:19,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:19,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:19,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:19,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272892236] [2022-01-18 17:50:19,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272892236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:19,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477444223] [2022-01-18 17:50:19,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:50:19,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:19,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:19,417 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) [2022-01-18 17:50:19,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 17:50:19,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:50:19,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:19,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:50:19,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:19,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:19,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477444223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:19,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:19,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 17:50:19,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69805375] [2022-01-18 17:50:19,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:19,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:50:19,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:19,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:50:19,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:50:19,653 INFO L87 Difference]: Start difference. First operand 7624 states and 29005 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:21,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:21,333 INFO L93 Difference]: Finished difference Result 13035 states and 44313 transitions. [2022-01-18 17:50:21,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-18 17:50:21,333 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:50:21,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:21,364 INFO L225 Difference]: With dead ends: 13035 [2022-01-18 17:50:21,364 INFO L226 Difference]: Without dead ends: 12994 [2022-01-18 17:50:21,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3972 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2636, Invalid=7870, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 17:50:21,365 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 802 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:21,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 300 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:50:21,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12994 states. [2022-01-18 17:50:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12994 to 7678. [2022-01-18 17:50:21,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7678 states, 7677 states have (on average 3.8047414354565587) internal successors, (29209), 7677 states have internal predecessors, (29209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7678 states to 7678 states and 29209 transitions. [2022-01-18 17:50:21,591 INFO L78 Accepts]: Start accepts. Automaton has 7678 states and 29209 transitions. Word has length 28 [2022-01-18 17:50:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:21,592 INFO L470 AbstractCegarLoop]: Abstraction has 7678 states and 29209 transitions. [2022-01-18 17:50:21,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:21,592 INFO L276 IsEmpty]: Start isEmpty. Operand 7678 states and 29209 transitions. [2022-01-18 17:50:21,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:21,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:21,605 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] [2022-01-18 17:50:21,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-01-18 17:50:21,805 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 [2022-01-18 17:50:21,805 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:21,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:21,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1347747220, now seen corresponding path program 76 times [2022-01-18 17:50:21,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:21,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456127402] [2022-01-18 17:50:21,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:21,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:21,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:21,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456127402] [2022-01-18 17:50:21,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456127402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:21,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131797151] [2022-01-18 17:50:21,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:50:21,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:21,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:21,843 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) [2022-01-18 17:50:21,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 17:50:21,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:50:21,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:21,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:50:21,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:21,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:22,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131797151] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:22,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:22,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 17:50:22,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036359481] [2022-01-18 17:50:22,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:22,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:50:22,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:22,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:50:22,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:50:22,077 INFO L87 Difference]: Start difference. First operand 7678 states and 29209 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:23,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:23,387 INFO L93 Difference]: Finished difference Result 11800 states and 40768 transitions. [2022-01-18 17:50:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 17:50:23,387 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:50:23,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:23,414 INFO L225 Difference]: With dead ends: 11800 [2022-01-18 17:50:23,414 INFO L226 Difference]: Without dead ends: 11751 [2022-01-18 17:50:23,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2669 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2030, Invalid=5110, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 17:50:23,415 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 536 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:23,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 245 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:50:23,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11751 states. [2022-01-18 17:50:23,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11751 to 7653. [2022-01-18 17:50:23,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7653 states, 7652 states have (on average 3.8080240460010453) internal successors, (29139), 7652 states have internal predecessors, (29139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7653 states to 7653 states and 29139 transitions. [2022-01-18 17:50:23,623 INFO L78 Accepts]: Start accepts. Automaton has 7653 states and 29139 transitions. Word has length 28 [2022-01-18 17:50:23,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:23,623 INFO L470 AbstractCegarLoop]: Abstraction has 7653 states and 29139 transitions. [2022-01-18 17:50:23,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:23,623 INFO L276 IsEmpty]: Start isEmpty. Operand 7653 states and 29139 transitions. [2022-01-18 17:50:23,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:23,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:23,636 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] [2022-01-18 17:50:23,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-01-18 17:50:23,836 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 [2022-01-18 17:50:23,837 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:23,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:23,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1898421154, now seen corresponding path program 77 times [2022-01-18 17:50:23,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:23,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314117306] [2022-01-18 17:50:23,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:23,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:23,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:23,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314117306] [2022-01-18 17:50:23,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314117306] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:23,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029308143] [2022-01-18 17:50:23,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:50:23,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:23,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:23,885 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) [2022-01-18 17:50:23,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 17:50:23,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:50:23,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:23,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:50:23,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:23,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:24,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029308143] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:24,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:24,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 17:50:24,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443523515] [2022-01-18 17:50:24,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:24,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:50:24,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:24,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:50:24,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:50:24,072 INFO L87 Difference]: Start difference. First operand 7653 states and 29139 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:25,451 INFO L93 Difference]: Finished difference Result 17070 states and 57452 transitions. [2022-01-18 17:50:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 17:50:25,452 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:50:25,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:25,497 INFO L225 Difference]: With dead ends: 17070 [2022-01-18 17:50:25,497 INFO L226 Difference]: Without dead ends: 16937 [2022-01-18 17:50:25,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2824 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1663, Invalid=5647, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 17:50:25,498 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 555 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:25,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 240 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:50:25,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16937 states. [2022-01-18 17:50:25,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16937 to 7913. [2022-01-18 17:50:25,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7913 states, 7912 states have (on average 3.8351870576339735) internal successors, (30344), 7912 states have internal predecessors, (30344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7913 states to 7913 states and 30344 transitions. [2022-01-18 17:50:25,769 INFO L78 Accepts]: Start accepts. Automaton has 7913 states and 30344 transitions. Word has length 28 [2022-01-18 17:50:25,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:25,769 INFO L470 AbstractCegarLoop]: Abstraction has 7913 states and 30344 transitions. [2022-01-18 17:50:25,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:25,769 INFO L276 IsEmpty]: Start isEmpty. Operand 7913 states and 30344 transitions. [2022-01-18 17:50:25,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:25,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:25,782 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] [2022-01-18 17:50:25,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-01-18 17:50:25,983 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 [2022-01-18 17:50:25,983 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:25,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:25,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1701976484, now seen corresponding path program 78 times [2022-01-18 17:50:25,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:25,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372828017] [2022-01-18 17:50:25,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:25,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:50:26,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:26,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372828017] [2022-01-18 17:50:26,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372828017] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:26,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443827413] [2022-01-18 17:50:26,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:50:26,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:26,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:26,010 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) [2022-01-18 17:50:26,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 17:50:26,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:50:26,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:26,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:50:26,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:50:26,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:50:26,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443827413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:26,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:26,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2022-01-18 17:50:26,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921425726] [2022-01-18 17:50:26,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:26,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:50:26,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:26,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:50:26,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:50:26,194 INFO L87 Difference]: Start difference. First operand 7913 states and 30344 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 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) [2022-01-18 17:50:26,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:26,617 INFO L93 Difference]: Finished difference Result 13951 states and 48563 transitions. [2022-01-18 17:50:26,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 17:50:26,618 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 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 28 [2022-01-18 17:50:26,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:26,650 INFO L225 Difference]: With dead ends: 13951 [2022-01-18 17:50:26,650 INFO L226 Difference]: Without dead ends: 13951 [2022-01-18 17:50:26,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=464, Invalid=868, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:50:26,651 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 389 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:26,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 95 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:50:26,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13951 states. [2022-01-18 17:50:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13951 to 7621. [2022-01-18 17:50:26,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7621 states, 7620 states have (on average 3.812729658792651) internal successors, (29053), 7620 states have internal predecessors, (29053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:26,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7621 states to 7621 states and 29053 transitions. [2022-01-18 17:50:26,875 INFO L78 Accepts]: Start accepts. Automaton has 7621 states and 29053 transitions. Word has length 28 [2022-01-18 17:50:26,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:26,875 INFO L470 AbstractCegarLoop]: Abstraction has 7621 states and 29053 transitions. [2022-01-18 17:50:26,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 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) [2022-01-18 17:50:26,875 INFO L276 IsEmpty]: Start isEmpty. Operand 7621 states and 29053 transitions. [2022-01-18 17:50:26,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:26,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:26,888 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] [2022-01-18 17:50:26,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-01-18 17:50:27,088 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 [2022-01-18 17:50:27,089 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:27,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:27,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1659448956, now seen corresponding path program 79 times [2022-01-18 17:50:27,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:27,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341570401] [2022-01-18 17:50:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:27,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:27,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:27,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341570401] [2022-01-18 17:50:27,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341570401] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:27,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210584217] [2022-01-18 17:50:27,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:50:27,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:27,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:27,128 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:50:27,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 17:50:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:27,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:50:27,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:27,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:27,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210584217] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:27,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:27,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-01-18 17:50:27,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061985398] [2022-01-18 17:50:27,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:27,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:50:27,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:27,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:50:27,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:50:27,329 INFO L87 Difference]: Start difference. First operand 7621 states and 29053 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:28,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:28,636 INFO L93 Difference]: Finished difference Result 16836 states and 57663 transitions. [2022-01-18 17:50:28,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 17:50:28,637 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:50:28,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:28,679 INFO L225 Difference]: With dead ends: 16836 [2022-01-18 17:50:28,679 INFO L226 Difference]: Without dead ends: 16836 [2022-01-18 17:50:28,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3066 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1779, Invalid=6231, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 17:50:28,681 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 450 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:28,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 373 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:50:28,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16836 states. [2022-01-18 17:50:28,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16836 to 7737. [2022-01-18 17:50:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7737 states, 7736 states have (on average 3.8187693898655635) internal successors, (29542), 7736 states have internal predecessors, (29542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:28,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7737 states to 7737 states and 29542 transitions. [2022-01-18 17:50:28,995 INFO L78 Accepts]: Start accepts. Automaton has 7737 states and 29542 transitions. Word has length 28 [2022-01-18 17:50:28,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:28,995 INFO L470 AbstractCegarLoop]: Abstraction has 7737 states and 29542 transitions. [2022-01-18 17:50:28,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:28,995 INFO L276 IsEmpty]: Start isEmpty. Operand 7737 states and 29542 transitions. [2022-01-18 17:50:29,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:29,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:29,009 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] [2022-01-18 17:50:29,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-01-18 17:50:29,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-01-18 17:50:29,209 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:29,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:29,209 INFO L85 PathProgramCache]: Analyzing trace with hash -874534862, now seen corresponding path program 80 times [2022-01-18 17:50:29,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:29,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103018764] [2022-01-18 17:50:29,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:29,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:29,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:29,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103018764] [2022-01-18 17:50:29,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103018764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:29,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183576113] [2022-01-18 17:50:29,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:50:29,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:29,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:29,249 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:50:29,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 17:50:29,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:50:29,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:29,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:50:29,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:29,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:29,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183576113] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:29,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:29,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-01-18 17:50:29,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239618779] [2022-01-18 17:50:29,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:29,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:50:29,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:29,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:50:29,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:50:29,453 INFO L87 Difference]: Start difference. First operand 7737 states and 29542 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:30,745 INFO L93 Difference]: Finished difference Result 16876 states and 58103 transitions. [2022-01-18 17:50:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 17:50:30,745 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:50:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:30,787 INFO L225 Difference]: With dead ends: 16876 [2022-01-18 17:50:30,787 INFO L226 Difference]: Without dead ends: 16876 [2022-01-18 17:50:30,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1581, Invalid=5901, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 17:50:30,788 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 431 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:30,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 421 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:50:30,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16876 states. [2022-01-18 17:50:31,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16876 to 7869. [2022-01-18 17:50:31,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7869 states, 7868 states have (on average 3.8093543467208946) internal successors, (29972), 7868 states have internal predecessors, (29972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:31,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7869 states to 7869 states and 29972 transitions. [2022-01-18 17:50:31,157 INFO L78 Accepts]: Start accepts. Automaton has 7869 states and 29972 transitions. Word has length 28 [2022-01-18 17:50:31,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:31,157 INFO L470 AbstractCegarLoop]: Abstraction has 7869 states and 29972 transitions. [2022-01-18 17:50:31,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:31,158 INFO L276 IsEmpty]: Start isEmpty. Operand 7869 states and 29972 transitions. [2022-01-18 17:50:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:31,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:31,173 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] [2022-01-18 17:50:31,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-01-18 17:50:31,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-01-18 17:50:31,373 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:31,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:31,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1957557518, now seen corresponding path program 81 times [2022-01-18 17:50:31,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:31,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195307248] [2022-01-18 17:50:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:31,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:31,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:31,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195307248] [2022-01-18 17:50:31,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195307248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:31,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853086694] [2022-01-18 17:50:31,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:50:31,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:31,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:31,412 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:50:31,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 17:50:31,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:50:31,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:31,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:50:31,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:31,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:31,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853086694] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:31,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:31,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 17:50:31,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606731526] [2022-01-18 17:50:31,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:31,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:50:31,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:31,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:50:31,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:50:31,593 INFO L87 Difference]: Start difference. First operand 7869 states and 29972 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:32,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:32,935 INFO L93 Difference]: Finished difference Result 19414 states and 65266 transitions. [2022-01-18 17:50:32,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 17:50:32,935 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:50:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:32,986 INFO L225 Difference]: With dead ends: 19414 [2022-01-18 17:50:32,986 INFO L226 Difference]: Without dead ends: 19369 [2022-01-18 17:50:32,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3061 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1800, Invalid=5856, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 17:50:32,987 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 631 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:32,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 246 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:50:33,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19369 states. [2022-01-18 17:50:33,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19369 to 9274. [2022-01-18 17:50:33,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9274 states, 9273 states have (on average 3.850749487760164) internal successors, (35708), 9273 states have internal predecessors, (35708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:33,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 35708 transitions. [2022-01-18 17:50:33,429 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 35708 transitions. Word has length 28 [2022-01-18 17:50:33,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:33,429 INFO L470 AbstractCegarLoop]: Abstraction has 9274 states and 35708 transitions. [2022-01-18 17:50:33,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:33,429 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 35708 transitions. [2022-01-18 17:50:33,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:33,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:33,447 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] [2022-01-18 17:50:33,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-01-18 17:50:33,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:33,647 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:33,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:33,648 INFO L85 PathProgramCache]: Analyzing trace with hash -486479400, now seen corresponding path program 82 times [2022-01-18 17:50:33,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:33,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75889726] [2022-01-18 17:50:33,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:33,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:33,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:33,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75889726] [2022-01-18 17:50:33,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75889726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:33,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752830056] [2022-01-18 17:50:33,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:50:33,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:33,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:33,698 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:50:33,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 17:50:33,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:50:33,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:33,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:50:33,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:33,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:33,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752830056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:33,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:33,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 17:50:33,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375482426] [2022-01-18 17:50:33,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:33,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:50:33,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:33,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:50:33,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:50:33,945 INFO L87 Difference]: Start difference. First operand 9274 states and 35708 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:35,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:35,416 INFO L93 Difference]: Finished difference Result 19985 states and 66983 transitions. [2022-01-18 17:50:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 17:50:35,416 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:50:35,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:35,466 INFO L225 Difference]: With dead ends: 19985 [2022-01-18 17:50:35,467 INFO L226 Difference]: Without dead ends: 19985 [2022-01-18 17:50:35,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3005 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1800, Invalid=5856, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 17:50:35,468 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 635 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:35,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 285 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:50:35,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19985 states. [2022-01-18 17:50:35,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19985 to 9062. [2022-01-18 17:50:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9062 states, 9061 states have (on average 3.8345657212228232) internal successors, (34745), 9061 states have internal predecessors, (34745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9062 states to 9062 states and 34745 transitions. [2022-01-18 17:50:35,807 INFO L78 Accepts]: Start accepts. Automaton has 9062 states and 34745 transitions. Word has length 28 [2022-01-18 17:50:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:35,807 INFO L470 AbstractCegarLoop]: Abstraction has 9062 states and 34745 transitions. [2022-01-18 17:50:35,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:35,808 INFO L276 IsEmpty]: Start isEmpty. Operand 9062 states and 34745 transitions. [2022-01-18 17:50:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:35,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:35,823 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] [2022-01-18 17:50:35,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-01-18 17:50:36,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-01-18 17:50:36,023 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:36,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash -919356004, now seen corresponding path program 83 times [2022-01-18 17:50:36,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:36,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746887383] [2022-01-18 17:50:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:36,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:36,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:36,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746887383] [2022-01-18 17:50:36,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746887383] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:36,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567128038] [2022-01-18 17:50:36,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:50:36,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:36,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:36,065 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:50:36,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 17:50:36,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 17:50:36,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:36,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:50:36,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:36,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:36,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567128038] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:36,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:36,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-01-18 17:50:36,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931674814] [2022-01-18 17:50:36,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:36,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:50:36,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:36,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:50:36,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:50:36,266 INFO L87 Difference]: Start difference. First operand 9062 states and 34745 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:37,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:37,505 INFO L93 Difference]: Finished difference Result 17840 states and 62687 transitions. [2022-01-18 17:50:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 17:50:37,505 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:50:37,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:37,562 INFO L225 Difference]: With dead ends: 17840 [2022-01-18 17:50:37,562 INFO L226 Difference]: Without dead ends: 17836 [2022-01-18 17:50:37,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1477, Invalid=5003, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 17:50:37,563 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 599 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:37,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 268 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:50:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17836 states. [2022-01-18 17:50:37,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17836 to 8772. [2022-01-18 17:50:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8772 states, 8771 states have (on average 3.851100216622962) internal successors, (33778), 8771 states have internal predecessors, (33778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8772 states to 8772 states and 33778 transitions. [2022-01-18 17:50:37,883 INFO L78 Accepts]: Start accepts. Automaton has 8772 states and 33778 transitions. Word has length 28 [2022-01-18 17:50:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:37,883 INFO L470 AbstractCegarLoop]: Abstraction has 8772 states and 33778 transitions. [2022-01-18 17:50:37,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 8772 states and 33778 transitions. [2022-01-18 17:50:37,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:37,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:37,899 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] [2022-01-18 17:50:37,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-01-18 17:50:38,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-01-18 17:50:38,099 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:38,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:38,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1191365194, now seen corresponding path program 84 times [2022-01-18 17:50:38,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:38,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264964662] [2022-01-18 17:50:38,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:38,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:38,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:38,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264964662] [2022-01-18 17:50:38,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264964662] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:38,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204466809] [2022-01-18 17:50:38,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:50:38,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:38,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:38,147 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:50:38,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 17:50:38,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:50:38,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:38,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:50:38,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:38,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:38,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204466809] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:38,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:38,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-01-18 17:50:38,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971662915] [2022-01-18 17:50:38,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:38,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:50:38,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:38,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:50:38,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:50:38,412 INFO L87 Difference]: Start difference. First operand 8772 states and 33778 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) [2022-01-18 17:50:42,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:42,039 INFO L93 Difference]: Finished difference Result 25466 states and 88615 transitions. [2022-01-18 17:50:42,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-01-18 17:50:42,040 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 28 [2022-01-18 17:50:42,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:42,126 INFO L225 Difference]: With dead ends: 25466 [2022-01-18 17:50:42,127 INFO L226 Difference]: Without dead ends: 25466 [2022-01-18 17:50:42,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20003 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=8056, Invalid=35000, Unknown=0, NotChecked=0, Total=43056 [2022-01-18 17:50:42,131 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1027 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:42,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1027 Valid, 416 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:50:42,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25466 states. [2022-01-18 17:50:42,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25466 to 9231. [2022-01-18 17:50:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9231 states, 9230 states have (on average 3.9005417118093173) internal successors, (36002), 9230 states have internal predecessors, (36002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:42,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9231 states to 9231 states and 36002 transitions. [2022-01-18 17:50:42,559 INFO L78 Accepts]: Start accepts. Automaton has 9231 states and 36002 transitions. Word has length 28 [2022-01-18 17:50:42,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:42,559 INFO L470 AbstractCegarLoop]: Abstraction has 9231 states and 36002 transitions. [2022-01-18 17:50:42,559 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) [2022-01-18 17:50:42,559 INFO L276 IsEmpty]: Start isEmpty. Operand 9231 states and 36002 transitions. [2022-01-18 17:50:42,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:42,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:42,575 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] [2022-01-18 17:50:42,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-01-18 17:50:42,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:42,775 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:42,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:42,775 INFO L85 PathProgramCache]: Analyzing trace with hash -624413114, now seen corresponding path program 85 times [2022-01-18 17:50:42,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:42,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652748421] [2022-01-18 17:50:42,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:42,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:42,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:42,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652748421] [2022-01-18 17:50:42,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652748421] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:42,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858594243] [2022-01-18 17:50:42,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:50:42,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:42,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:42,814 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:50:42,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 17:50:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:42,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:50:42,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:42,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:43,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858594243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:43,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:43,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-01-18 17:50:43,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317462811] [2022-01-18 17:50:43,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:43,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:50:43,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:43,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:50:43,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:50:43,076 INFO L87 Difference]: Start difference. First operand 9231 states and 36002 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) [2022-01-18 17:50:45,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:45,874 INFO L93 Difference]: Finished difference Result 23850 states and 83310 transitions. [2022-01-18 17:50:45,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-01-18 17:50:45,875 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 28 [2022-01-18 17:50:45,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:45,940 INFO L225 Difference]: With dead ends: 23850 [2022-01-18 17:50:45,941 INFO L226 Difference]: Without dead ends: 23850 [2022-01-18 17:50:45,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11791 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5497, Invalid=20263, Unknown=0, NotChecked=0, Total=25760 [2022-01-18 17:50:45,944 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 826 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:45,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 524 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:50:45,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23850 states. [2022-01-18 17:50:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23850 to 9146. [2022-01-18 17:50:46,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9146 states, 9145 states have (on average 3.887916894477857) internal successors, (35555), 9145 states have internal predecessors, (35555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9146 states to 9146 states and 35555 transitions. [2022-01-18 17:50:46,455 INFO L78 Accepts]: Start accepts. Automaton has 9146 states and 35555 transitions. Word has length 28 [2022-01-18 17:50:46,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:46,455 INFO L470 AbstractCegarLoop]: Abstraction has 9146 states and 35555 transitions. [2022-01-18 17:50:46,455 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) [2022-01-18 17:50:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 9146 states and 35555 transitions. [2022-01-18 17:50:46,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:46,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:46,471 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] [2022-01-18 17:50:46,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-01-18 17:50:46,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-01-18 17:50:46,672 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:46,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:46,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1796758972, now seen corresponding path program 86 times [2022-01-18 17:50:46,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:46,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015419229] [2022-01-18 17:50:46,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:46,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:46,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:46,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015419229] [2022-01-18 17:50:46,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015419229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:46,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767526671] [2022-01-18 17:50:46,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:50:46,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:46,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:46,714 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:50:46,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 17:50:46,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:50:46,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:46,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:50:46,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:46,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:46,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767526671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:46,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:46,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 19 [2022-01-18 17:50:46,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79352297] [2022-01-18 17:50:46,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:46,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:50:46,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:46,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:50:46,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:50:46,955 INFO L87 Difference]: Start difference. First operand 9146 states and 35555 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:49,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:49,374 INFO L93 Difference]: Finished difference Result 22084 states and 75856 transitions. [2022-01-18 17:50:49,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-18 17:50:49,375 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:50:49,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:49,432 INFO L225 Difference]: With dead ends: 22084 [2022-01-18 17:50:49,432 INFO L226 Difference]: Without dead ends: 22084 [2022-01-18 17:50:49,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9684 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4569, Invalid=16893, Unknown=0, NotChecked=0, Total=21462 [2022-01-18 17:50:49,435 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 734 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:49,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 423 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:50:49,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22084 states. [2022-01-18 17:50:49,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22084 to 9204. [2022-01-18 17:50:49,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9204 states, 9203 states have (on average 3.8889492556774963) internal successors, (35790), 9203 states have internal predecessors, (35790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9204 states to 9204 states and 35790 transitions. [2022-01-18 17:50:49,830 INFO L78 Accepts]: Start accepts. Automaton has 9204 states and 35790 transitions. Word has length 28 [2022-01-18 17:50:49,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:49,830 INFO L470 AbstractCegarLoop]: Abstraction has 9204 states and 35790 transitions. [2022-01-18 17:50:49,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:49,830 INFO L276 IsEmpty]: Start isEmpty. Operand 9204 states and 35790 transitions. [2022-01-18 17:50:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:49,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:49,845 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] [2022-01-18 17:50:49,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-01-18 17:50:50,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:50,046 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:50,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:50,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1715382884, now seen corresponding path program 87 times [2022-01-18 17:50:50,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:50,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869987500] [2022-01-18 17:50:50,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:50,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:50,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:50,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869987500] [2022-01-18 17:50:50,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869987500] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:50,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142028928] [2022-01-18 17:50:50,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:50:50,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:50,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:50,085 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:50:50,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 17:50:50,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 17:50:50,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:50,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:50:50,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:50,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:50,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:50,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142028928] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:50,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:50,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 19 [2022-01-18 17:50:50,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614818221] [2022-01-18 17:50:50,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:50,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:50:50,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:50,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:50:50,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:50:50,349 INFO L87 Difference]: Start difference. First operand 9204 states and 35790 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:52,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:52,408 INFO L93 Difference]: Finished difference Result 21078 states and 73293 transitions. [2022-01-18 17:50:52,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-18 17:50:52,409 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:50:52,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:52,463 INFO L225 Difference]: With dead ends: 21078 [2022-01-18 17:50:52,463 INFO L226 Difference]: Without dead ends: 21070 [2022-01-18 17:50:52,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7026 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3686, Invalid=13084, Unknown=0, NotChecked=0, Total=16770 [2022-01-18 17:50:52,465 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 852 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:52,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 406 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:50:52,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21070 states. [2022-01-18 17:50:52,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21070 to 9024. [2022-01-18 17:50:52,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9024 states, 9023 states have (on average 3.874321179208689) internal successors, (34958), 9023 states have internal predecessors, (34958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9024 states to 9024 states and 34958 transitions. [2022-01-18 17:50:52,834 INFO L78 Accepts]: Start accepts. Automaton has 9024 states and 34958 transitions. Word has length 28 [2022-01-18 17:50:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:52,834 INFO L470 AbstractCegarLoop]: Abstraction has 9024 states and 34958 transitions. [2022-01-18 17:50:52,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 9024 states and 34958 transitions. [2022-01-18 17:50:52,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:52,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:52,850 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] [2022-01-18 17:50:52,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-01-18 17:50:53,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:53,050 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:53,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:53,050 INFO L85 PathProgramCache]: Analyzing trace with hash -784725668, now seen corresponding path program 88 times [2022-01-18 17:50:53,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:53,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338931540] [2022-01-18 17:50:53,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:53,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:53,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:53,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338931540] [2022-01-18 17:50:53,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338931540] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:53,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498971374] [2022-01-18 17:50:53,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:50:53,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:53,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:53,090 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:50:53,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 17:50:53,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:50:53,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:53,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:50:53,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:53,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:53,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498971374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:53,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:53,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-01-18 17:50:53,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734929437] [2022-01-18 17:50:53,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:53,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:50:53,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:53,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:50:53,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:50:53,341 INFO L87 Difference]: Start difference. First operand 9024 states and 34958 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:55,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:55,981 INFO L93 Difference]: Finished difference Result 20447 states and 70072 transitions. [2022-01-18 17:50:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-18 17:50:55,981 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:50:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:56,032 INFO L225 Difference]: With dead ends: 20447 [2022-01-18 17:50:56,033 INFO L226 Difference]: Without dead ends: 20447 [2022-01-18 17:50:56,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9264 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4648, Invalid=17108, Unknown=0, NotChecked=0, Total=21756 [2022-01-18 17:50:56,034 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 914 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:56,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 525 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1642 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:50:56,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20447 states. [2022-01-18 17:50:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20447 to 9040. [2022-01-18 17:50:56,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9040 states, 9039 states have (on average 3.8745436442084302) internal successors, (35022), 9039 states have internal predecessors, (35022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9040 states to 9040 states and 35022 transitions. [2022-01-18 17:50:56,363 INFO L78 Accepts]: Start accepts. Automaton has 9040 states and 35022 transitions. Word has length 28 [2022-01-18 17:50:56,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:50:56,363 INFO L470 AbstractCegarLoop]: Abstraction has 9040 states and 35022 transitions. [2022-01-18 17:50:56,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:56,363 INFO L276 IsEmpty]: Start isEmpty. Operand 9040 states and 35022 transitions. [2022-01-18 17:50:56,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:50:56,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:50:56,377 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] [2022-01-18 17:50:56,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-01-18 17:50:56,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:56,578 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:50:56,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:50:56,578 INFO L85 PathProgramCache]: Analyzing trace with hash 858313486, now seen corresponding path program 89 times [2022-01-18 17:50:56,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:50:56,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062296088] [2022-01-18 17:50:56,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:50:56,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:50:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:50:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:56,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:50:56,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062296088] [2022-01-18 17:50:56,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062296088] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:50:56,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535686446] [2022-01-18 17:50:56,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:50:56,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:50:56,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:50:56,616 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:50:56,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-18 17:50:56,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 17:50:56,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:50:56,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:50:56,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:50:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:56,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:50:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:50:56,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535686446] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:50:56,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:50:56,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-01-18 17:50:56,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161762503] [2022-01-18 17:50:56,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:50:56,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:50:56,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:50:56,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:50:56,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:50:56,849 INFO L87 Difference]: Start difference. First operand 9040 states and 35022 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:50:59,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:50:59,820 INFO L93 Difference]: Finished difference Result 19748 states and 69189 transitions. [2022-01-18 17:50:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-01-18 17:50:59,821 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:50:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:50:59,872 INFO L225 Difference]: With dead ends: 19748 [2022-01-18 17:50:59,872 INFO L226 Difference]: Without dead ends: 19740 [2022-01-18 17:50:59,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12753 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5782, Invalid=23974, Unknown=0, NotChecked=0, Total=29756 [2022-01-18 17:50:59,874 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 775 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:50:59,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 524 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:50:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19740 states. [2022-01-18 17:51:00,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19740 to 8169. [2022-01-18 17:51:00,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8169 states, 8168 states have (on average 3.803501469147894) internal successors, (31067), 8168 states have internal predecessors, (31067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8169 states to 8169 states and 31067 transitions. [2022-01-18 17:51:00,216 INFO L78 Accepts]: Start accepts. Automaton has 8169 states and 31067 transitions. Word has length 28 [2022-01-18 17:51:00,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:00,216 INFO L470 AbstractCegarLoop]: Abstraction has 8169 states and 31067 transitions. [2022-01-18 17:51:00,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:00,216 INFO L276 IsEmpty]: Start isEmpty. Operand 8169 states and 31067 transitions. [2022-01-18 17:51:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:00,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:00,230 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] [2022-01-18 17:51:00,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-01-18 17:51:00,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:00,430 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:00,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:00,430 INFO L85 PathProgramCache]: Analyzing trace with hash 941717066, now seen corresponding path program 90 times [2022-01-18 17:51:00,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:00,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951485968] [2022-01-18 17:51:00,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:00,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:00,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:00,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951485968] [2022-01-18 17:51:00,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951485968] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:00,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480883903] [2022-01-18 17:51:00,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:51:00,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:00,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:00,470 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:00,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-18 17:51:00,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 17:51:00,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:00,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:51:00,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:00,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:00,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480883903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:00,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:00,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 17:51:00,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261425593] [2022-01-18 17:51:00,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:00,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:51:00,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:00,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:51:00,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:51:00,699 INFO L87 Difference]: Start difference. First operand 8169 states and 31067 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:02,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:02,858 INFO L93 Difference]: Finished difference Result 17387 states and 58830 transitions. [2022-01-18 17:51:02,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-18 17:51:02,858 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:02,901 INFO L225 Difference]: With dead ends: 17387 [2022-01-18 17:51:02,901 INFO L226 Difference]: Without dead ends: 17387 [2022-01-18 17:51:02,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7132 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3292, Invalid=14264, Unknown=0, NotChecked=0, Total=17556 [2022-01-18 17:51:02,903 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 600 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:02,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 498 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:51:02,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17387 states. [2022-01-18 17:51:03,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17387 to 8189. [2022-01-18 17:51:03,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8189 states, 8188 states have (on average 3.802027357107963) internal successors, (31131), 8188 states have internal predecessors, (31131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8189 states to 8189 states and 31131 transitions. [2022-01-18 17:51:03,223 INFO L78 Accepts]: Start accepts. Automaton has 8189 states and 31131 transitions. Word has length 28 [2022-01-18 17:51:03,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:03,223 INFO L470 AbstractCegarLoop]: Abstraction has 8189 states and 31131 transitions. [2022-01-18 17:51:03,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:03,223 INFO L276 IsEmpty]: Start isEmpty. Operand 8189 states and 31131 transitions. [2022-01-18 17:51:03,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:03,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:03,237 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] [2022-01-18 17:51:03,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-01-18 17:51:03,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:03,437 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:03,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:03,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1699890054, now seen corresponding path program 91 times [2022-01-18 17:51:03,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:03,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390517999] [2022-01-18 17:51:03,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:03,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:03,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:03,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390517999] [2022-01-18 17:51:03,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390517999] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:03,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11620085] [2022-01-18 17:51:03,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:51:03,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:03,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:03,477 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:03,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-18 17:51:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:03,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:51:03,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:03,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:03,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11620085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:03,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:03,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-01-18 17:51:03,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532776594] [2022-01-18 17:51:03,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:03,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:51:03,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:03,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:51:03,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:51:03,726 INFO L87 Difference]: Start difference. First operand 8189 states and 31131 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:07,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:07,051 INFO L93 Difference]: Finished difference Result 18253 states and 61191 transitions. [2022-01-18 17:51:07,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-01-18 17:51:07,051 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:07,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:07,095 INFO L225 Difference]: With dead ends: 18253 [2022-01-18 17:51:07,096 INFO L226 Difference]: Without dead ends: 18253 [2022-01-18 17:51:07,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15900 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5934, Invalid=30356, Unknown=0, NotChecked=0, Total=36290 [2022-01-18 17:51:07,100 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 811 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 1853 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:07,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 615 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1853 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:51:07,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18253 states. [2022-01-18 17:51:07,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18253 to 8309. [2022-01-18 17:51:07,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8309 states, 8308 states have (on average 3.7930909966297546) internal successors, (31513), 8308 states have internal predecessors, (31513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:07,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8309 states to 8309 states and 31513 transitions. [2022-01-18 17:51:07,469 INFO L78 Accepts]: Start accepts. Automaton has 8309 states and 31513 transitions. Word has length 28 [2022-01-18 17:51:07,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:07,469 INFO L470 AbstractCegarLoop]: Abstraction has 8309 states and 31513 transitions. [2022-01-18 17:51:07,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:07,469 INFO L276 IsEmpty]: Start isEmpty. Operand 8309 states and 31513 transitions. [2022-01-18 17:51:07,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:07,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:07,484 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] [2022-01-18 17:51:07,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-01-18 17:51:07,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-01-18 17:51:07,685 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:07,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:07,685 INFO L85 PathProgramCache]: Analyzing trace with hash -56850900, now seen corresponding path program 92 times [2022-01-18 17:51:07,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:07,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864968027] [2022-01-18 17:51:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:07,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:07,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:07,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864968027] [2022-01-18 17:51:07,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864968027] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:07,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583267094] [2022-01-18 17:51:07,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:51:07,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:07,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:07,749 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:07,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-18 17:51:07,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:51:07,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:07,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:51:07,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:07,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:08,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583267094] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:08,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:08,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-01-18 17:51:08,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781050064] [2022-01-18 17:51:08,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:08,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:51:08,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:08,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:51:08,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:51:08,002 INFO L87 Difference]: Start difference. First operand 8309 states and 31513 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:10,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:10,639 INFO L93 Difference]: Finished difference Result 16806 states and 57197 transitions. [2022-01-18 17:51:10,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-18 17:51:10,640 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:10,681 INFO L225 Difference]: With dead ends: 16806 [2022-01-18 17:51:10,681 INFO L226 Difference]: Without dead ends: 16798 [2022-01-18 17:51:10,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9327 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4289, Invalid=18361, Unknown=0, NotChecked=0, Total=22650 [2022-01-18 17:51:10,684 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 658 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1881 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:10,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 612 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1881 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:51:10,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16798 states. [2022-01-18 17:51:10,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16798 to 8235. [2022-01-18 17:51:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8235 states, 8234 states have (on average 3.7946320136021376) internal successors, (31245), 8234 states have internal predecessors, (31245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:10,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8235 states to 8235 states and 31245 transitions. [2022-01-18 17:51:10,965 INFO L78 Accepts]: Start accepts. Automaton has 8235 states and 31245 transitions. Word has length 28 [2022-01-18 17:51:10,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:10,965 INFO L470 AbstractCegarLoop]: Abstraction has 8235 states and 31245 transitions. [2022-01-18 17:51:10,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 8235 states and 31245 transitions. [2022-01-18 17:51:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:10,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:10,979 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] [2022-01-18 17:51:10,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-01-18 17:51:11,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-01-18 17:51:11,179 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:11,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:11,180 INFO L85 PathProgramCache]: Analyzing trace with hash 522592324, now seen corresponding path program 65 times [2022-01-18 17:51:11,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:11,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319699325] [2022-01-18 17:51:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:11,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:11,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:11,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319699325] [2022-01-18 17:51:11,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319699325] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:11,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773466074] [2022-01-18 17:51:11,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:51:11,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:11,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:11,236 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:11,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-18 17:51:11,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:51:11,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:11,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:51:11,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:11,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:11,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773466074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:11,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:11,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 17:51:11,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265902595] [2022-01-18 17:51:11,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:11,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:51:11,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:11,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:51:11,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:51:11,426 INFO L87 Difference]: Start difference. First operand 8235 states and 31245 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:12,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:12,564 INFO L93 Difference]: Finished difference Result 16714 states and 58049 transitions. [2022-01-18 17:51:12,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 17:51:12,564 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:12,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:12,605 INFO L225 Difference]: With dead ends: 16714 [2022-01-18 17:51:12,606 INFO L226 Difference]: Without dead ends: 16714 [2022-01-18 17:51:12,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2356 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1332, Invalid=5474, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 17:51:12,607 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 512 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:12,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 316 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:51:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16714 states. [2022-01-18 17:51:12,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16714 to 8257. [2022-01-18 17:51:12,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8257 states, 8256 states have (on average 3.794089147286822) internal successors, (31324), 8256 states have internal predecessors, (31324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8257 states to 8257 states and 31324 transitions. [2022-01-18 17:51:12,879 INFO L78 Accepts]: Start accepts. Automaton has 8257 states and 31324 transitions. Word has length 28 [2022-01-18 17:51:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:12,879 INFO L470 AbstractCegarLoop]: Abstraction has 8257 states and 31324 transitions. [2022-01-18 17:51:12,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 8257 states and 31324 transitions. [2022-01-18 17:51:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:12,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:12,893 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] [2022-01-18 17:51:12,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-01-18 17:51:13,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-01-18 17:51:13,094 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:13,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:13,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1089207438, now seen corresponding path program 66 times [2022-01-18 17:51:13,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:13,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754261580] [2022-01-18 17:51:13,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:13,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:13,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:13,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754261580] [2022-01-18 17:51:13,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754261580] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:13,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707699463] [2022-01-18 17:51:13,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:51:13,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:13,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:13,137 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:13,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-18 17:51:13,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:51:13,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:13,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:51:13,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:13,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:13,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707699463] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:13,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:13,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 17:51:13,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198436823] [2022-01-18 17:51:13,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:13,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:51:13,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:13,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:51:13,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:51:13,327 INFO L87 Difference]: Start difference. First operand 8257 states and 31324 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:14,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:14,770 INFO L93 Difference]: Finished difference Result 17529 states and 60234 transitions. [2022-01-18 17:51:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-18 17:51:14,771 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:14,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:14,825 INFO L225 Difference]: With dead ends: 17529 [2022-01-18 17:51:14,825 INFO L226 Difference]: Without dead ends: 17529 [2022-01-18 17:51:14,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3262 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1763, Invalid=7167, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 17:51:14,827 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 460 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:14,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 458 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:51:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17529 states. [2022-01-18 17:51:15,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17529 to 8325. [2022-01-18 17:51:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8325 states, 8324 states have (on average 3.7873618452666986) internal successors, (31526), 8324 states have internal predecessors, (31526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8325 states to 8325 states and 31526 transitions. [2022-01-18 17:51:15,106 INFO L78 Accepts]: Start accepts. Automaton has 8325 states and 31526 transitions. Word has length 28 [2022-01-18 17:51:15,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:15,106 INFO L470 AbstractCegarLoop]: Abstraction has 8325 states and 31526 transitions. [2022-01-18 17:51:15,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:15,106 INFO L276 IsEmpty]: Start isEmpty. Operand 8325 states and 31526 transitions. [2022-01-18 17:51:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:15,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:15,120 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] [2022-01-18 17:51:15,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-01-18 17:51:15,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:15,321 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:15,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:15,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1320747086, now seen corresponding path program 67 times [2022-01-18 17:51:15,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:15,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540647984] [2022-01-18 17:51:15,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:15,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:15,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:15,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540647984] [2022-01-18 17:51:15,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540647984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:15,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447849147] [2022-01-18 17:51:15,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:51:15,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:15,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:15,367 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:15,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-18 17:51:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:15,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:51:15,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:15,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:15,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447849147] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:15,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:15,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 17:51:15,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579607239] [2022-01-18 17:51:15,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:15,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:51:15,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:15,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:51:15,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:51:15,561 INFO L87 Difference]: Start difference. First operand 8325 states and 31526 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:17,073 INFO L93 Difference]: Finished difference Result 17153 states and 59705 transitions. [2022-01-18 17:51:17,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-18 17:51:17,074 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:17,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:17,117 INFO L225 Difference]: With dead ends: 17153 [2022-01-18 17:51:17,117 INFO L226 Difference]: Without dead ends: 17153 [2022-01-18 17:51:17,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4063 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2029, Invalid=8683, Unknown=0, NotChecked=0, Total=10712 [2022-01-18 17:51:17,119 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 538 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:17,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 338 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:51:17,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17153 states. [2022-01-18 17:51:17,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17153 to 8623. [2022-01-18 17:51:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8623 states, 8622 states have (on average 3.772326606355834) internal successors, (32525), 8622 states have internal predecessors, (32525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8623 states to 8623 states and 32525 transitions. [2022-01-18 17:51:17,423 INFO L78 Accepts]: Start accepts. Automaton has 8623 states and 32525 transitions. Word has length 28 [2022-01-18 17:51:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:17,423 INFO L470 AbstractCegarLoop]: Abstraction has 8623 states and 32525 transitions. [2022-01-18 17:51:17,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 8623 states and 32525 transitions. [2022-01-18 17:51:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:17,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:17,438 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] [2022-01-18 17:51:17,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-01-18 17:51:17,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:17,638 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:17,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:17,639 INFO L85 PathProgramCache]: Analyzing trace with hash -932691624, now seen corresponding path program 68 times [2022-01-18 17:51:17,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:17,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312553598] [2022-01-18 17:51:17,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:17,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:17,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:17,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312553598] [2022-01-18 17:51:17,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312553598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:17,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261526321] [2022-01-18 17:51:17,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:51:17,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:17,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:17,677 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:17,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-18 17:51:17,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:51:17,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:17,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:51:17,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:17,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:17,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261526321] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:17,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:17,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2022-01-18 17:51:17,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231677927] [2022-01-18 17:51:17,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:17,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:51:17,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:17,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:51:17,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:51:17,853 INFO L87 Difference]: Start difference. First operand 8623 states and 32525 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:18,429 INFO L93 Difference]: Finished difference Result 13956 states and 50746 transitions. [2022-01-18 17:51:18,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:51:18,429 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:18,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:18,464 INFO L225 Difference]: With dead ends: 13956 [2022-01-18 17:51:18,464 INFO L226 Difference]: Without dead ends: 13956 [2022-01-18 17:51:18,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=545, Invalid=1347, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:51:18,465 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 331 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:18,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 188 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:51:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13956 states. [2022-01-18 17:51:18,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13956 to 9846. [2022-01-18 17:51:18,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9846 states, 9845 states have (on average 3.8252920264093446) internal successors, (37660), 9845 states have internal predecessors, (37660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:18,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9846 states to 9846 states and 37660 transitions. [2022-01-18 17:51:18,699 INFO L78 Accepts]: Start accepts. Automaton has 9846 states and 37660 transitions. Word has length 28 [2022-01-18 17:51:18,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:18,699 INFO L470 AbstractCegarLoop]: Abstraction has 9846 states and 37660 transitions. [2022-01-18 17:51:18,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:18,699 INFO L276 IsEmpty]: Start isEmpty. Operand 9846 states and 37660 transitions. [2022-01-18 17:51:18,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:18,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:18,716 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] [2022-01-18 17:51:18,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-01-18 17:51:18,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:18,916 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:18,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:18,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1365568228, now seen corresponding path program 69 times [2022-01-18 17:51:18,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:18,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111014805] [2022-01-18 17:51:18,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:18,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:18,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:18,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111014805] [2022-01-18 17:51:18,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111014805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:18,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389283543] [2022-01-18 17:51:18,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:51:18,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:18,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:18,960 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:18,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-18 17:51:18,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 17:51:18,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:18,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:51:18,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:19,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:19,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389283543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:19,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:19,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 17:51:19,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723724785] [2022-01-18 17:51:19,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:19,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:51:19,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:19,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:51:19,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:51:19,144 INFO L87 Difference]: Start difference. First operand 9846 states and 37660 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:20,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:20,425 INFO L93 Difference]: Finished difference Result 18161 states and 64894 transitions. [2022-01-18 17:51:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-18 17:51:20,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:20,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:20,473 INFO L225 Difference]: With dead ends: 18161 [2022-01-18 17:51:20,473 INFO L226 Difference]: Without dead ends: 18157 [2022-01-18 17:51:20,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2883 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1698, Invalid=6492, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 17:51:20,474 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 485 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:20,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 293 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:51:20,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18157 states. [2022-01-18 17:51:20,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18157 to 9598. [2022-01-18 17:51:20,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9598 states, 9597 states have (on average 3.8386995936230073) internal successors, (36840), 9597 states have internal predecessors, (36840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:20,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9598 states to 9598 states and 36840 transitions. [2022-01-18 17:51:20,851 INFO L78 Accepts]: Start accepts. Automaton has 9598 states and 36840 transitions. Word has length 28 [2022-01-18 17:51:20,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:20,851 INFO L470 AbstractCegarLoop]: Abstraction has 9598 states and 36840 transitions. [2022-01-18 17:51:20,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:20,851 INFO L276 IsEmpty]: Start isEmpty. Operand 9598 states and 36840 transitions. [2022-01-18 17:51:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:20,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:20,867 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] [2022-01-18 17:51:20,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-01-18 17:51:21,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:21,068 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:21,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:21,068 INFO L85 PathProgramCache]: Analyzing trace with hash 654689240, now seen corresponding path program 93 times [2022-01-18 17:51:21,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:21,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832355346] [2022-01-18 17:51:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:21,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:21,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:21,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832355346] [2022-01-18 17:51:21,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832355346] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:21,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720654386] [2022-01-18 17:51:21,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:51:21,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:21,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:21,104 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:21,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-18 17:51:21,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:51:21,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:21,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:51:21,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:21,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:21,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720654386] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:21,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:21,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-01-18 17:51:21,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350969124] [2022-01-18 17:51:21,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:21,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:51:21,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:21,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:51:21,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:51:21,317 INFO L87 Difference]: Start difference. First operand 9598 states and 36840 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:22,575 INFO L93 Difference]: Finished difference Result 20165 states and 72760 transitions. [2022-01-18 17:51:22,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 17:51:22,575 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:22,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:22,628 INFO L225 Difference]: With dead ends: 20165 [2022-01-18 17:51:22,628 INFO L226 Difference]: Without dead ends: 20141 [2022-01-18 17:51:22,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1647, Invalid=3903, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 17:51:22,629 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 493 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:22,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 288 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:51:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20141 states. [2022-01-18 17:51:22,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20141 to 11719. [2022-01-18 17:51:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11719 states, 11718 states have (on average 3.9720942140296978) internal successors, (46545), 11718 states have internal predecessors, (46545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:22,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11719 states to 11719 states and 46545 transitions. [2022-01-18 17:51:22,989 INFO L78 Accepts]: Start accepts. Automaton has 11719 states and 46545 transitions. Word has length 28 [2022-01-18 17:51:22,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:22,990 INFO L470 AbstractCegarLoop]: Abstraction has 11719 states and 46545 transitions. [2022-01-18 17:51:22,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:22,990 INFO L276 IsEmpty]: Start isEmpty. Operand 11719 states and 46545 transitions. [2022-01-18 17:51:23,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:23,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:23,010 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] [2022-01-18 17:51:23,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-01-18 17:51:23,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:23,210 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:23,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:23,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1598936656, now seen corresponding path program 94 times [2022-01-18 17:51:23,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:23,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728970987] [2022-01-18 17:51:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:23,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:23,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:23,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728970987] [2022-01-18 17:51:23,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728970987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:23,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265168834] [2022-01-18 17:51:23,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:51:23,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:23,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:23,245 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:23,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-18 17:51:23,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:51:23,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:23,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:51:23,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:23,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:23,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265168834] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:23,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:23,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-01-18 17:51:23,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812116028] [2022-01-18 17:51:23,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:23,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:51:23,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:23,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:51:23,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:51:23,455 INFO L87 Difference]: Start difference. First operand 11719 states and 46545 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:24,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:24,995 INFO L93 Difference]: Finished difference Result 24453 states and 85433 transitions. [2022-01-18 17:51:24,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 17:51:24,995 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:24,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:25,063 INFO L225 Difference]: With dead ends: 24453 [2022-01-18 17:51:25,063 INFO L226 Difference]: Without dead ends: 24453 [2022-01-18 17:51:25,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3233 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2115, Invalid=5717, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 17:51:25,064 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 618 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:25,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 374 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:51:25,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24453 states. [2022-01-18 17:51:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24453 to 11722. [2022-01-18 17:51:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11722 states, 11721 states have (on average 3.9577681085231635) internal successors, (46389), 11721 states have internal predecessors, (46389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11722 states to 11722 states and 46389 transitions. [2022-01-18 17:51:25,572 INFO L78 Accepts]: Start accepts. Automaton has 11722 states and 46389 transitions. Word has length 28 [2022-01-18 17:51:25,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:25,572 INFO L470 AbstractCegarLoop]: Abstraction has 11722 states and 46389 transitions. [2022-01-18 17:51:25,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:25,572 INFO L276 IsEmpty]: Start isEmpty. Operand 11722 states and 46389 transitions. [2022-01-18 17:51:25,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:25,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:25,593 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] [2022-01-18 17:51:25,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-01-18 17:51:25,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:25,794 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:25,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:25,794 INFO L85 PathProgramCache]: Analyzing trace with hash -619472876, now seen corresponding path program 95 times [2022-01-18 17:51:25,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:25,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434569456] [2022-01-18 17:51:25,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:25,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:25,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:25,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434569456] [2022-01-18 17:51:25,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434569456] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:25,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417316258] [2022-01-18 17:51:25,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:51:25,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:25,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:25,832 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:25,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-01-18 17:51:25,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:51:25,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:25,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:51:25,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:25,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:26,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417316258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:26,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:26,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 17:51:26,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073402168] [2022-01-18 17:51:26,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:26,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:51:26,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:26,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:51:26,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:51:26,001 INFO L87 Difference]: Start difference. First operand 11722 states and 46389 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:26,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:26,765 INFO L93 Difference]: Finished difference Result 22330 states and 83311 transitions. [2022-01-18 17:51:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 17:51:26,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:26,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:26,822 INFO L225 Difference]: With dead ends: 22330 [2022-01-18 17:51:26,823 INFO L226 Difference]: Without dead ends: 22070 [2022-01-18 17:51:26,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=652, Invalid=2000, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 17:51:26,823 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 351 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:26,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 193 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:51:26,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22070 states. [2022-01-18 17:51:27,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22070 to 15934. [2022-01-18 17:51:27,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15934 states, 15933 states have (on average 4.017636352224942) internal successors, (64013), 15933 states have internal predecessors, (64013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:27,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15934 states to 15934 states and 64013 transitions. [2022-01-18 17:51:27,239 INFO L78 Accepts]: Start accepts. Automaton has 15934 states and 64013 transitions. Word has length 28 [2022-01-18 17:51:27,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:27,239 INFO L470 AbstractCegarLoop]: Abstraction has 15934 states and 64013 transitions. [2022-01-18 17:51:27,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:27,239 INFO L276 IsEmpty]: Start isEmpty. Operand 15934 states and 64013 transitions. [2022-01-18 17:51:27,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:27,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:27,267 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:51:27,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-01-18 17:51:27,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2022-01-18 17:51:27,467 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:27,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:27,467 INFO L85 PathProgramCache]: Analyzing trace with hash -36116904, now seen corresponding path program 96 times [2022-01-18 17:51:27,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:27,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012330582] [2022-01-18 17:51:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:27,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:51:27,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:27,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012330582] [2022-01-18 17:51:27,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012330582] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:27,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662584621] [2022-01-18 17:51:27,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:51:27,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:27,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:27,498 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:27,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-01-18 17:51:27,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:51:27,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:27,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:51:27,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:51:27,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:51:27,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662584621] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:27,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:27,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 13 [2022-01-18 17:51:27,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291353042] [2022-01-18 17:51:27,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:27,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:51:27,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:27,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:51:27,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:51:27,667 INFO L87 Difference]: Start difference. First operand 15934 states and 64013 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:28,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:28,046 INFO L93 Difference]: Finished difference Result 22929 states and 85346 transitions. [2022-01-18 17:51:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 17:51:28,046 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:28,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:28,111 INFO L225 Difference]: With dead ends: 22929 [2022-01-18 17:51:28,111 INFO L226 Difference]: Without dead ends: 22929 [2022-01-18 17:51:28,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=602, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:51:28,111 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 321 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:28,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 78 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:51:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22929 states. [2022-01-18 17:51:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22929 to 16022. [2022-01-18 17:51:28,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16022 states, 16021 states have (on average 4.00280881343237) internal successors, (64129), 16021 states have internal predecessors, (64129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:28,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16022 states to 16022 states and 64129 transitions. [2022-01-18 17:51:28,603 INFO L78 Accepts]: Start accepts. Automaton has 16022 states and 64129 transitions. Word has length 28 [2022-01-18 17:51:28,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:28,603 INFO L470 AbstractCegarLoop]: Abstraction has 16022 states and 64129 transitions. [2022-01-18 17:51:28,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:28,604 INFO L276 IsEmpty]: Start isEmpty. Operand 16022 states and 64129 transitions. [2022-01-18 17:51:28,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:28,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:28,633 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] [2022-01-18 17:51:28,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-01-18 17:51:28,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-01-18 17:51:28,833 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:28,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:28,834 INFO L85 PathProgramCache]: Analyzing trace with hash -664128222, now seen corresponding path program 97 times [2022-01-18 17:51:28,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:28,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455297100] [2022-01-18 17:51:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:28,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:28,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:28,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455297100] [2022-01-18 17:51:28,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455297100] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:28,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593550194] [2022-01-18 17:51:28,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:51:28,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:28,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:28,886 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:28,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-01-18 17:51:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:28,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:51:28,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:28,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:29,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593550194] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:29,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:29,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-01-18 17:51:29,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068104400] [2022-01-18 17:51:29,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:29,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:51:29,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:29,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:51:29,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:51:29,075 INFO L87 Difference]: Start difference. First operand 16022 states and 64129 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:30,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:30,129 INFO L93 Difference]: Finished difference Result 29125 states and 108582 transitions. [2022-01-18 17:51:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 17:51:30,129 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:30,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:30,224 INFO L225 Difference]: With dead ends: 29125 [2022-01-18 17:51:30,224 INFO L226 Difference]: Without dead ends: 29118 [2022-01-18 17:51:30,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1285, Invalid=4117, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 17:51:30,225 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 392 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:30,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 296 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:51:30,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29118 states. [2022-01-18 17:51:30,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29118 to 16971. [2022-01-18 17:51:30,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16971 states, 16970 states have (on average 3.9985857395403652) internal successors, (67856), 16970 states have internal predecessors, (67856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:30,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16971 states to 16971 states and 67856 transitions. [2022-01-18 17:51:30,799 INFO L78 Accepts]: Start accepts. Automaton has 16971 states and 67856 transitions. Word has length 28 [2022-01-18 17:51:30,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:30,799 INFO L470 AbstractCegarLoop]: Abstraction has 16971 states and 67856 transitions. [2022-01-18 17:51:30,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:30,799 INFO L276 IsEmpty]: Start isEmpty. Operand 16971 states and 67856 transitions. [2022-01-18 17:51:30,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:30,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:30,830 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] [2022-01-18 17:51:30,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-01-18 17:51:31,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-01-18 17:51:31,031 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:31,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:31,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1238551230, now seen corresponding path program 98 times [2022-01-18 17:51:31,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:31,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619688544] [2022-01-18 17:51:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:31,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:31,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:31,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619688544] [2022-01-18 17:51:31,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619688544] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:31,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685169958] [2022-01-18 17:51:31,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:51:31,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:31,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:31,087 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:31,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-01-18 17:51:31,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:51:31,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:31,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:51:31,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:31,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:31,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685169958] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:31,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:31,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 15 [2022-01-18 17:51:31,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224448411] [2022-01-18 17:51:31,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:31,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:51:31,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:31,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:51:31,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:51:31,272 INFO L87 Difference]: Start difference. First operand 16971 states and 67856 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:32,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:32,262 INFO L93 Difference]: Finished difference Result 28443 states and 106828 transitions. [2022-01-18 17:51:32,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 17:51:32,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:32,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:32,352 INFO L225 Difference]: With dead ends: 28443 [2022-01-18 17:51:32,353 INFO L226 Difference]: Without dead ends: 28443 [2022-01-18 17:51:32,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=752, Invalid=2554, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 17:51:32,353 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 360 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:32,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 296 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:51:32,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28443 states. [2022-01-18 17:51:32,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28443 to 17307. [2022-01-18 17:51:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17307 states, 17306 states have (on average 3.983011672252398) internal successors, (68930), 17306 states have internal predecessors, (68930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17307 states to 17307 states and 68930 transitions. [2022-01-18 17:51:32,849 INFO L78 Accepts]: Start accepts. Automaton has 17307 states and 68930 transitions. Word has length 28 [2022-01-18 17:51:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:32,849 INFO L470 AbstractCegarLoop]: Abstraction has 17307 states and 68930 transitions. [2022-01-18 17:51:32,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 17307 states and 68930 transitions. [2022-01-18 17:51:32,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:32,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:32,881 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] [2022-01-18 17:51:32,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-01-18 17:51:33,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-01-18 17:51:33,082 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:33,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:33,082 INFO L85 PathProgramCache]: Analyzing trace with hash 155528574, now seen corresponding path program 99 times [2022-01-18 17:51:33,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:33,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649949051] [2022-01-18 17:51:33,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:33,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:33,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:33,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649949051] [2022-01-18 17:51:33,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649949051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:33,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942614787] [2022-01-18 17:51:33,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:51:33,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:33,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:33,114 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:33,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-01-18 17:51:33,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:51:33,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:33,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:51:33,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:33,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:33,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942614787] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:33,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:33,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:51:33,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129423368] [2022-01-18 17:51:33,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:33,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:51:33,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:33,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:51:33,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:51:33,275 INFO L87 Difference]: Start difference. First operand 17307 states and 68930 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) [2022-01-18 17:51:33,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:33,812 INFO L93 Difference]: Finished difference Result 23169 states and 87572 transitions. [2022-01-18 17:51:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:51:33,812 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 28 [2022-01-18 17:51:33,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:33,880 INFO L225 Difference]: With dead ends: 23169 [2022-01-18 17:51:33,880 INFO L226 Difference]: Without dead ends: 23129 [2022-01-18 17:51:33,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=956, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:51:33,880 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 280 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:33,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 148 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:51:33,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23129 states. [2022-01-18 17:51:34,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23129 to 17987. [2022-01-18 17:51:34,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17987 states, 17986 states have (on average 3.9894362281774716) internal successors, (71754), 17986 states have internal predecessors, (71754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17987 states to 17987 states and 71754 transitions. [2022-01-18 17:51:34,360 INFO L78 Accepts]: Start accepts. Automaton has 17987 states and 71754 transitions. Word has length 28 [2022-01-18 17:51:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:34,360 INFO L470 AbstractCegarLoop]: Abstraction has 17987 states and 71754 transitions. [2022-01-18 17:51:34,360 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) [2022-01-18 17:51:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 17987 states and 71754 transitions. [2022-01-18 17:51:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:34,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:34,392 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] [2022-01-18 17:51:34,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-01-18 17:51:34,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-01-18 17:51:34,593 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:34,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:34,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1626606692, now seen corresponding path program 100 times [2022-01-18 17:51:34,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:34,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034026319] [2022-01-18 17:51:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:34,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:51:34,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:34,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034026319] [2022-01-18 17:51:34,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034026319] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:34,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785499140] [2022-01-18 17:51:34,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:51:34,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:34,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:34,626 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:34,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-01-18 17:51:34,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:51:34,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:34,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:51:34,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:51:34,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:51:34,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785499140] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:34,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:34,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:51:34,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305280250] [2022-01-18 17:51:34,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:34,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:51:34,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:34,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:51:34,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:51:34,787 INFO L87 Difference]: Start difference. First operand 17987 states and 71754 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) [2022-01-18 17:51:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:35,416 INFO L93 Difference]: Finished difference Result 23904 states and 89849 transitions. [2022-01-18 17:51:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:51:35,416 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 28 [2022-01-18 17:51:35,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:35,484 INFO L225 Difference]: With dead ends: 23904 [2022-01-18 17:51:35,485 INFO L226 Difference]: Without dead ends: 23904 [2022-01-18 17:51:35,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=956, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:51:35,485 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 252 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:35,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 180 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:51:35,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23904 states. [2022-01-18 17:51:35,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23904 to 18105. [2022-01-18 17:51:35,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18105 states, 18104 states have (on average 3.985030932390632) internal successors, (72145), 18104 states have internal predecessors, (72145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:35,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18105 states to 18105 states and 72145 transitions. [2022-01-18 17:51:35,977 INFO L78 Accepts]: Start accepts. Automaton has 18105 states and 72145 transitions. Word has length 28 [2022-01-18 17:51:35,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:35,978 INFO L470 AbstractCegarLoop]: Abstraction has 18105 states and 72145 transitions. [2022-01-18 17:51:35,978 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) [2022-01-18 17:51:35,978 INFO L276 IsEmpty]: Start isEmpty. Operand 18105 states and 72145 transitions. [2022-01-18 17:51:36,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:36,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:36,010 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] [2022-01-18 17:51:36,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-01-18 17:51:36,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:36,210 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:36,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:36,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1193730088, now seen corresponding path program 101 times [2022-01-18 17:51:36,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:36,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526366830] [2022-01-18 17:51:36,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:36,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:51:36,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:36,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526366830] [2022-01-18 17:51:36,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526366830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:36,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087274750] [2022-01-18 17:51:36,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:51:36,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:36,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:36,251 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:36,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-01-18 17:51:36,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 17:51:36,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:36,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:51:36,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:51:36,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:51:36,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087274750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:36,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:36,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 15 [2022-01-18 17:51:36,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456952358] [2022-01-18 17:51:36,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:36,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:51:36,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:36,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:51:36,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:51:36,478 INFO L87 Difference]: Start difference. First operand 18105 states and 72145 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:37,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:37,294 INFO L93 Difference]: Finished difference Result 28885 states and 109443 transitions. [2022-01-18 17:51:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:51:37,294 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:37,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:37,387 INFO L225 Difference]: With dead ends: 28885 [2022-01-18 17:51:37,387 INFO L226 Difference]: Without dead ends: 28881 [2022-01-18 17:51:37,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=656, Invalid=2100, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 17:51:37,387 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 436 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:37,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 279 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:51:37,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28881 states. [2022-01-18 17:51:37,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28881 to 17991. [2022-01-18 17:51:37,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17991 states, 17990 states have (on average 3.9883268482490273) internal successors, (71750), 17990 states have internal predecessors, (71750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:37,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17991 states to 17991 states and 71750 transitions. [2022-01-18 17:51:37,928 INFO L78 Accepts]: Start accepts. Automaton has 17991 states and 71750 transitions. Word has length 28 [2022-01-18 17:51:37,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:37,928 INFO L470 AbstractCegarLoop]: Abstraction has 17991 states and 71750 transitions. [2022-01-18 17:51:37,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:37,928 INFO L276 IsEmpty]: Start isEmpty. Operand 17991 states and 71750 transitions. [2022-01-18 17:51:38,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:38,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:38,033 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] [2022-01-18 17:51:38,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-01-18 17:51:38,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:38,233 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:38,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:38,234 INFO L85 PathProgramCache]: Analyzing trace with hash 297909272, now seen corresponding path program 102 times [2022-01-18 17:51:38,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:38,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412315875] [2022-01-18 17:51:38,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:38,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:38,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:38,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412315875] [2022-01-18 17:51:38,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412315875] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:38,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063001897] [2022-01-18 17:51:38,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:51:38,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:38,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:38,272 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:38,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-01-18 17:51:38,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:51:38,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:38,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:51:38,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:38,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:38,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063001897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:38,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:38,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 17:51:38,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556840618] [2022-01-18 17:51:38,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:38,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:51:38,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:38,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:51:38,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:51:38,444 INFO L87 Difference]: Start difference. First operand 17991 states and 71750 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:39,134 INFO L93 Difference]: Finished difference Result 25132 states and 94101 transitions. [2022-01-18 17:51:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 17:51:39,135 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:39,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:39,219 INFO L225 Difference]: With dead ends: 25132 [2022-01-18 17:51:39,219 INFO L226 Difference]: Without dead ends: 25132 [2022-01-18 17:51:39,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=516, Invalid=1290, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:51:39,220 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 273 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:39,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 218 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:51:39,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25132 states. [2022-01-18 17:51:39,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25132 to 18194. [2022-01-18 17:51:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18194 states, 18193 states have (on average 3.9836200736547025) internal successors, (72474), 18193 states have internal predecessors, (72474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:39,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18194 states to 18194 states and 72474 transitions. [2022-01-18 17:51:39,776 INFO L78 Accepts]: Start accepts. Automaton has 18194 states and 72474 transitions. Word has length 28 [2022-01-18 17:51:39,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:39,776 INFO L470 AbstractCegarLoop]: Abstraction has 18194 states and 72474 transitions. [2022-01-18 17:51:39,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:39,776 INFO L276 IsEmpty]: Start isEmpty. Operand 18194 states and 72474 transitions. [2022-01-18 17:51:39,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:39,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:39,808 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] [2022-01-18 17:51:39,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-01-18 17:51:40,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-01-18 17:51:40,009 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:40,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:40,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1791066746, now seen corresponding path program 103 times [2022-01-18 17:51:40,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:40,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782721463] [2022-01-18 17:51:40,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:40,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:40,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:40,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782721463] [2022-01-18 17:51:40,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782721463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:40,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574523621] [2022-01-18 17:51:40,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:51:40,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:40,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:40,053 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:40,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-01-18 17:51:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:40,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:51:40,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:40,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:40,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574523621] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:40,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:40,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-01-18 17:51:40,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767021106] [2022-01-18 17:51:40,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:40,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:51:40,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:40,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:51:40,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:51:40,230 INFO L87 Difference]: Start difference. First operand 18194 states and 72474 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:41,082 INFO L93 Difference]: Finished difference Result 29102 states and 110153 transitions. [2022-01-18 17:51:41,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 17:51:41,083 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:41,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:41,176 INFO L225 Difference]: With dead ends: 29102 [2022-01-18 17:51:41,176 INFO L226 Difference]: Without dead ends: 29090 [2022-01-18 17:51:41,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=755, Invalid=2551, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 17:51:41,177 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 435 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:41,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 283 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:51:41,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29090 states. [2022-01-18 17:51:41,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29090 to 18222. [2022-01-18 17:51:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18222 states, 18221 states have (on average 3.981120684923989) internal successors, (72540), 18221 states have internal predecessors, (72540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:41,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18222 states to 18222 states and 72540 transitions. [2022-01-18 17:51:41,796 INFO L78 Accepts]: Start accepts. Automaton has 18222 states and 72540 transitions. Word has length 28 [2022-01-18 17:51:41,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:41,797 INFO L470 AbstractCegarLoop]: Abstraction has 18222 states and 72540 transitions. [2022-01-18 17:51:41,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:41,797 INFO L276 IsEmpty]: Start isEmpty. Operand 18222 states and 72540 transitions. [2022-01-18 17:51:41,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:41,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:41,829 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] [2022-01-18 17:51:41,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-01-18 17:51:42,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:42,030 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:42,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:42,030 INFO L85 PathProgramCache]: Analyzing trace with hash 22785830, now seen corresponding path program 104 times [2022-01-18 17:51:42,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:42,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527130577] [2022-01-18 17:51:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:42,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:42,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:42,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527130577] [2022-01-18 17:51:42,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527130577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:42,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440463631] [2022-01-18 17:51:42,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:51:42,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:42,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:42,076 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:42,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-01-18 17:51:42,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:51:42,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:42,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:51:42,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:42,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:42,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440463631] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:42,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:42,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-01-18 17:51:42,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818140425] [2022-01-18 17:51:42,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:42,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:51:42,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:42,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:51:42,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:51:42,284 INFO L87 Difference]: Start difference. First operand 18222 states and 72540 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:43,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:43,901 INFO L93 Difference]: Finished difference Result 40859 states and 152607 transitions. [2022-01-18 17:51:43,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-18 17:51:43,901 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:43,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:44,036 INFO L225 Difference]: With dead ends: 40859 [2022-01-18 17:51:44,036 INFO L226 Difference]: Without dead ends: 40859 [2022-01-18 17:51:44,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2043, Invalid=7463, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 17:51:44,037 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 502 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:44,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 383 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:51:44,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40859 states. [2022-01-18 17:51:44,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40859 to 24537. [2022-01-18 17:51:44,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24537 states, 24536 states have (on average 4.01450929246821) internal successors, (98500), 24536 states have internal predecessors, (98500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:44,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24537 states to 24537 states and 98500 transitions. [2022-01-18 17:51:44,975 INFO L78 Accepts]: Start accepts. Automaton has 24537 states and 98500 transitions. Word has length 28 [2022-01-18 17:51:44,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:44,975 INFO L470 AbstractCegarLoop]: Abstraction has 24537 states and 98500 transitions. [2022-01-18 17:51:44,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 24537 states and 98500 transitions. [2022-01-18 17:51:45,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:45,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:45,020 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] [2022-01-18 17:51:45,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-01-18 17:51:45,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:45,220 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:45,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:45,220 INFO L85 PathProgramCache]: Analyzing trace with hash 104161918, now seen corresponding path program 105 times [2022-01-18 17:51:45,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:45,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689132602] [2022-01-18 17:51:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:45,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:45,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:45,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689132602] [2022-01-18 17:51:45,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689132602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:45,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189401403] [2022-01-18 17:51:45,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:51:45,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:45,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:45,264 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:45,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-01-18 17:51:45,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 17:51:45,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:45,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:51:45,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:45,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:45,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189401403] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:45,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:45,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-01-18 17:51:45,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438003036] [2022-01-18 17:51:45,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:45,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:51:45,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:45,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:51:45,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:51:45,463 INFO L87 Difference]: Start difference. First operand 24537 states and 98500 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:46,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:46,838 INFO L93 Difference]: Finished difference Result 39804 states and 149837 transitions. [2022-01-18 17:51:46,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 17:51:46,838 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:46,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:46,973 INFO L225 Difference]: With dead ends: 39804 [2022-01-18 17:51:46,973 INFO L226 Difference]: Without dead ends: 39784 [2022-01-18 17:51:46,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2821 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1761, Invalid=6071, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 17:51:46,974 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 569 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:46,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 329 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:51:47,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39784 states. [2022-01-18 17:51:47,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39784 to 24329. [2022-01-18 17:51:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24329 states, 24328 states have (on average 4.017592897073331) internal successors, (97740), 24328 states have internal predecessors, (97740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24329 states to 24329 states and 97740 transitions. [2022-01-18 17:51:47,981 INFO L78 Accepts]: Start accepts. Automaton has 24329 states and 97740 transitions. Word has length 28 [2022-01-18 17:51:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:47,981 INFO L470 AbstractCegarLoop]: Abstraction has 24329 states and 97740 transitions. [2022-01-18 17:51:47,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 24329 states and 97740 transitions. [2022-01-18 17:51:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:48,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:48,025 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] [2022-01-18 17:51:48,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-01-18 17:51:48,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-01-18 17:51:48,225 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:48,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:48,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1410930054, now seen corresponding path program 106 times [2022-01-18 17:51:48,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:48,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011580723] [2022-01-18 17:51:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:48,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:48,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:48,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011580723] [2022-01-18 17:51:48,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011580723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:48,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824033368] [2022-01-18 17:51:48,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:51:48,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:48,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:48,269 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:48,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-01-18 17:51:48,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:51:48,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:48,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:51:48,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:48,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:48,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824033368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:48,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:48,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-01-18 17:51:48,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874015494] [2022-01-18 17:51:48,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:48,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:51:48,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:48,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:51:48,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:51:48,467 INFO L87 Difference]: Start difference. First operand 24329 states and 97740 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:50,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:50,353 INFO L93 Difference]: Finished difference Result 41258 states and 153613 transitions. [2022-01-18 17:51:50,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-18 17:51:50,353 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:51:50,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:50,490 INFO L225 Difference]: With dead ends: 41258 [2022-01-18 17:51:50,490 INFO L226 Difference]: Without dead ends: 41222 [2022-01-18 17:51:50,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5102 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2733, Invalid=10377, Unknown=0, NotChecked=0, Total=13110 [2022-01-18 17:51:50,492 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 785 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:50,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 392 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:51:50,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41222 states. [2022-01-18 17:51:51,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41222 to 24421. [2022-01-18 17:51:51,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24421 states, 24420 states have (on average 4.016052416052416) internal successors, (98072), 24420 states have internal predecessors, (98072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24421 states to 24421 states and 98072 transitions. [2022-01-18 17:51:51,563 INFO L78 Accepts]: Start accepts. Automaton has 24421 states and 98072 transitions. Word has length 28 [2022-01-18 17:51:51,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:51,563 INFO L470 AbstractCegarLoop]: Abstraction has 24421 states and 98072 transitions. [2022-01-18 17:51:51,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:51,563 INFO L276 IsEmpty]: Start isEmpty. Operand 24421 states and 98072 transitions. [2022-01-18 17:51:51,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:51,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:51,605 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] [2022-01-18 17:51:51,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-01-18 17:51:51,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:51,806 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:51,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:51,806 INFO L85 PathProgramCache]: Analyzing trace with hash 186196662, now seen corresponding path program 107 times [2022-01-18 17:51:51,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:51,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649510287] [2022-01-18 17:51:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:51,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:51,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:51,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649510287] [2022-01-18 17:51:51,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649510287] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:51,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407595379] [2022-01-18 17:51:51,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:51:51,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:51,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:51,851 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:51,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-01-18 17:51:51,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 17:51:51,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:51,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:51:51,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:51,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:52,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407595379] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:52,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:52,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-01-18 17:51:52,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798126296] [2022-01-18 17:51:52,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:52,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:51:52,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:52,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:51:52,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:51:52,105 INFO L87 Difference]: Start difference. First operand 24421 states and 98072 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 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) [2022-01-18 17:51:55,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:51:55,079 INFO L93 Difference]: Finished difference Result 37698 states and 140323 transitions. [2022-01-18 17:51:55,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-01-18 17:51:55,080 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 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 28 [2022-01-18 17:51:55,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:51:55,205 INFO L225 Difference]: With dead ends: 37698 [2022-01-18 17:51:55,206 INFO L226 Difference]: Without dead ends: 37692 [2022-01-18 17:51:55,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11444 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5430, Invalid=21302, Unknown=0, NotChecked=0, Total=26732 [2022-01-18 17:51:55,209 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 916 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:51:55,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 583 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:51:55,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37692 states. [2022-01-18 17:51:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37692 to 24659. [2022-01-18 17:51:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24659 states, 24658 states have (on average 4.009205937221186) internal successors, (98859), 24658 states have internal predecessors, (98859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:51:56,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24659 states to 24659 states and 98859 transitions. [2022-01-18 17:51:56,408 INFO L78 Accepts]: Start accepts. Automaton has 24659 states and 98859 transitions. Word has length 28 [2022-01-18 17:51:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:51:56,409 INFO L470 AbstractCegarLoop]: Abstraction has 24659 states and 98859 transitions. [2022-01-18 17:51:56,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 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) [2022-01-18 17:51:56,409 INFO L276 IsEmpty]: Start isEmpty. Operand 24659 states and 98859 transitions. [2022-01-18 17:51:56,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:51:56,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:51:56,453 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] [2022-01-18 17:51:56,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-01-18 17:51:56,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:56,657 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:51:56,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:51:56,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1829235816, now seen corresponding path program 108 times [2022-01-18 17:51:56,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:51:56,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722289702] [2022-01-18 17:51:56,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:51:56,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:51:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:51:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:56,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:51:56,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722289702] [2022-01-18 17:51:56,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722289702] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:51:56,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426423922] [2022-01-18 17:51:56,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:51:56,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:51:56,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:51:56,702 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:51:56,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-01-18 17:51:56,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 17:51:56,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:51:56,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:51:56,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:51:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:56,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:51:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:51:56,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426423922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:51:56,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:51:56,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-01-18 17:51:56,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772116558] [2022-01-18 17:51:56,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:51:56,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:51:56,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:51:56,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:51:56,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:51:56,948 INFO L87 Difference]: Start difference. First operand 24659 states and 98859 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 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) [2022-01-18 17:52:00,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:52:00,691 INFO L93 Difference]: Finished difference Result 38359 states and 144218 transitions. [2022-01-18 17:52:00,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-01-18 17:52:00,703 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 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 28 [2022-01-18 17:52:00,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:52:00,842 INFO L225 Difference]: With dead ends: 38359 [2022-01-18 17:52:00,842 INFO L226 Difference]: Without dead ends: 38339 [2022-01-18 17:52:00,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16403 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7365, Invalid=32037, Unknown=0, NotChecked=0, Total=39402 [2022-01-18 17:52:00,844 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1089 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:52:00,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1089 Valid, 495 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:52:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38339 states. [2022-01-18 17:52:01,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38339 to 24396. [2022-01-18 17:52:01,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24396 states, 24395 states have (on average 4.013855298216848) internal successors, (97918), 24395 states have internal predecessors, (97918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:01,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24396 states to 24396 states and 97918 transitions. [2022-01-18 17:52:01,898 INFO L78 Accepts]: Start accepts. Automaton has 24396 states and 97918 transitions. Word has length 28 [2022-01-18 17:52:01,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:52:01,898 INFO L470 AbstractCegarLoop]: Abstraction has 24396 states and 97918 transitions. [2022-01-18 17:52:01,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 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) [2022-01-18 17:52:01,899 INFO L276 IsEmpty]: Start isEmpty. Operand 24396 states and 97918 transitions. [2022-01-18 17:52:01,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:52:01,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:52:01,942 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] [2022-01-18 17:52:01,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-01-18 17:52:02,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:02,143 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:52:02,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:52:02,144 INFO L85 PathProgramCache]: Analyzing trace with hash 561778638, now seen corresponding path program 109 times [2022-01-18 17:52:02,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:52:02,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562862521] [2022-01-18 17:52:02,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:52:02,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:52:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:02,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:52:02,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562862521] [2022-01-18 17:52:02,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562862521] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:52:02,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910564502] [2022-01-18 17:52:02,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:52:02,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:02,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:52:02,188 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:52:02,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-01-18 17:52:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:02,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:52:02,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:52:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:02,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:52:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:02,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910564502] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:52:02,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:52:02,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-01-18 17:52:02,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852692713] [2022-01-18 17:52:02,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:52:02,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:52:02,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:52:02,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:52:02,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:52:02,411 INFO L87 Difference]: Start difference. First operand 24396 states and 97918 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:05,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:52:05,341 INFO L93 Difference]: Finished difference Result 37169 states and 140623 transitions. [2022-01-18 17:52:05,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-01-18 17:52:05,341 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:52:05,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:52:05,721 INFO L225 Difference]: With dead ends: 37169 [2022-01-18 17:52:05,721 INFO L226 Difference]: Without dead ends: 37133 [2022-01-18 17:52:05,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10541 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4928, Invalid=21478, Unknown=0, NotChecked=0, Total=26406 [2022-01-18 17:52:05,722 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 722 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:52:05,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 464 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:52:05,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37133 states. [2022-01-18 17:52:06,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37133 to 24412. [2022-01-18 17:52:06,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24412 states, 24411 states have (on average 4.012412437016099) internal successors, (97947), 24411 states have internal predecessors, (97947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:06,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24412 states to 24412 states and 97947 transitions. [2022-01-18 17:52:06,732 INFO L78 Accepts]: Start accepts. Automaton has 24412 states and 97947 transitions. Word has length 28 [2022-01-18 17:52:06,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:52:06,732 INFO L470 AbstractCegarLoop]: Abstraction has 24412 states and 97947 transitions. [2022-01-18 17:52:06,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:06,732 INFO L276 IsEmpty]: Start isEmpty. Operand 24412 states and 97947 transitions. [2022-01-18 17:52:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:52:06,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:52:06,781 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] [2022-01-18 17:52:06,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-01-18 17:52:06,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-01-18 17:52:06,981 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:52:06,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:52:06,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2037892514, now seen corresponding path program 110 times [2022-01-18 17:52:06,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:52:06,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431615150] [2022-01-18 17:52:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:52:06,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:52:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:52:07,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:52:07,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431615150] [2022-01-18 17:52:07,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431615150] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:52:07,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428921221] [2022-01-18 17:52:07,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:52:07,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:07,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:52:07,024 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:52:07,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-01-18 17:52:07,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:52:07,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:52:07,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:52:07,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:52:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:07,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:52:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:52:07,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428921221] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:52:07,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:52:07,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 20 [2022-01-18 17:52:07,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831770284] [2022-01-18 17:52:07,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:52:07,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:52:07,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:52:07,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:52:07,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:52:07,292 INFO L87 Difference]: Start difference. First operand 24412 states and 97947 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 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) [2022-01-18 17:52:10,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:52:10,054 INFO L93 Difference]: Finished difference Result 56538 states and 210546 transitions. [2022-01-18 17:52:10,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-18 17:52:10,054 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 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 28 [2022-01-18 17:52:10,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:52:10,398 INFO L225 Difference]: With dead ends: 56538 [2022-01-18 17:52:10,399 INFO L226 Difference]: Without dead ends: 56538 [2022-01-18 17:52:10,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8271 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3926, Invalid=14980, Unknown=0, NotChecked=0, Total=18906 [2022-01-18 17:52:10,402 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 596 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:52:10,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 535 Invalid, 1931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1848 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:52:10,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56538 states. [2022-01-18 17:52:11,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56538 to 25144. [2022-01-18 17:52:11,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25144 states, 25143 states have (on average 4.031579366026329) internal successors, (101366), 25143 states have internal predecessors, (101366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25144 states to 25144 states and 101366 transitions. [2022-01-18 17:52:11,745 INFO L78 Accepts]: Start accepts. Automaton has 25144 states and 101366 transitions. Word has length 28 [2022-01-18 17:52:11,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:52:11,745 INFO L470 AbstractCegarLoop]: Abstraction has 25144 states and 101366 transitions. [2022-01-18 17:52:11,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 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) [2022-01-18 17:52:11,745 INFO L276 IsEmpty]: Start isEmpty. Operand 25144 states and 101366 transitions. [2022-01-18 17:52:11,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:52:11,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:52:11,790 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] [2022-01-18 17:52:11,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-01-18 17:52:11,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:11,991 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:52:11,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:52:11,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1690122702, now seen corresponding path program 111 times [2022-01-18 17:52:11,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:52:11,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791764284] [2022-01-18 17:52:11,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:52:11,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:52:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:52:12,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:52:12,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791764284] [2022-01-18 17:52:12,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791764284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:52:12,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261085437] [2022-01-18 17:52:12,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:52:12,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:12,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:52:12,030 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:52:12,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-01-18 17:52:12,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:52:12,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:52:12,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:52:12,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:52:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:12,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:52:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:52:12,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261085437] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:52:12,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:52:12,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 20 [2022-01-18 17:52:12,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87006169] [2022-01-18 17:52:12,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:52:12,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:52:12,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:52:12,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:52:12,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:52:12,282 INFO L87 Difference]: Start difference. First operand 25144 states and 101366 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 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) [2022-01-18 17:52:15,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:52:15,263 INFO L93 Difference]: Finished difference Result 60505 states and 225242 transitions. [2022-01-18 17:52:15,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-18 17:52:15,263 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 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 28 [2022-01-18 17:52:15,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:52:15,478 INFO L225 Difference]: With dead ends: 60505 [2022-01-18 17:52:15,478 INFO L226 Difference]: Without dead ends: 60505 [2022-01-18 17:52:15,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11105 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4654, Invalid=20468, Unknown=0, NotChecked=0, Total=25122 [2022-01-18 17:52:15,479 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 737 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:52:15,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 517 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1611 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:52:15,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60505 states. [2022-01-18 17:52:16,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60505 to 25015. [2022-01-18 17:52:16,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25015 states, 25014 states have (on average 4.025185895898297) internal successors, (100686), 25014 states have internal predecessors, (100686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:16,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25015 states to 25015 states and 100686 transitions. [2022-01-18 17:52:16,981 INFO L78 Accepts]: Start accepts. Automaton has 25015 states and 100686 transitions. Word has length 28 [2022-01-18 17:52:16,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:52:16,981 INFO L470 AbstractCegarLoop]: Abstraction has 25015 states and 100686 transitions. [2022-01-18 17:52:16,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 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) [2022-01-18 17:52:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 25015 states and 100686 transitions. [2022-01-18 17:52:17,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:52:17,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:52:17,033 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] [2022-01-18 17:52:17,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-01-18 17:52:17,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:17,234 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:52:17,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:52:17,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1076134064, now seen corresponding path program 112 times [2022-01-18 17:52:17,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:52:17,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611385995] [2022-01-18 17:52:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:52:17,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:52:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:17,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:52:17,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611385995] [2022-01-18 17:52:17,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611385995] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:52:17,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862306333] [2022-01-18 17:52:17,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:52:17,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:17,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:52:17,291 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:52:17,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-01-18 17:52:17,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:52:17,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:52:17,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:52:17,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:52:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:17,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:52:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:17,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862306333] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:52:17,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:52:17,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-01-18 17:52:17,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852542302] [2022-01-18 17:52:17,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:52:17,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:52:17,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:52:17,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:52:17,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:52:17,526 INFO L87 Difference]: Start difference. First operand 25015 states and 100686 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:20,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:52:20,022 INFO L93 Difference]: Finished difference Result 38522 states and 145188 transitions. [2022-01-18 17:52:20,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-18 17:52:20,022 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:52:20,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:52:20,150 INFO L225 Difference]: With dead ends: 38522 [2022-01-18 17:52:20,151 INFO L226 Difference]: Without dead ends: 38522 [2022-01-18 17:52:20,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7691 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3454, Invalid=15178, Unknown=0, NotChecked=0, Total=18632 [2022-01-18 17:52:20,152 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 628 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:52:20,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 525 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1582 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:52:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38522 states. [2022-01-18 17:52:21,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38522 to 25352. [2022-01-18 17:52:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25352 states, 25351 states have (on average 4.021103703995897) internal successors, (101939), 25351 states have internal predecessors, (101939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:21,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25352 states to 25352 states and 101939 transitions. [2022-01-18 17:52:21,140 INFO L78 Accepts]: Start accepts. Automaton has 25352 states and 101939 transitions. Word has length 28 [2022-01-18 17:52:21,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:52:21,140 INFO L470 AbstractCegarLoop]: Abstraction has 25352 states and 101939 transitions. [2022-01-18 17:52:21,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:21,140 INFO L276 IsEmpty]: Start isEmpty. Operand 25352 states and 101939 transitions. [2022-01-18 17:52:21,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:52:21,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:52:21,191 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] [2022-01-18 17:52:21,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-01-18 17:52:21,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-01-18 17:52:21,391 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:52:21,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:52:21,392 INFO L85 PathProgramCache]: Analyzing trace with hash 77566098, now seen corresponding path program 113 times [2022-01-18 17:52:21,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:52:21,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014874026] [2022-01-18 17:52:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:52:21,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:52:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:21,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:52:21,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014874026] [2022-01-18 17:52:21,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014874026] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:52:21,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723575129] [2022-01-18 17:52:21,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:52:21,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:21,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:52:21,433 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:52:21,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-01-18 17:52:21,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 17:52:21,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:52:21,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:52:21,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:52:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:21,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:52:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:21,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723575129] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:52:21,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:52:21,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 17:52:21,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410000575] [2022-01-18 17:52:21,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:52:21,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:52:21,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:52:21,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:52:21,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:52:21,675 INFO L87 Difference]: Start difference. First operand 25352 states and 101939 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:23,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:52:23,650 INFO L93 Difference]: Finished difference Result 36885 states and 140699 transitions. [2022-01-18 17:52:23,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-18 17:52:23,650 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:52:23,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:52:23,774 INFO L225 Difference]: With dead ends: 36885 [2022-01-18 17:52:23,774 INFO L226 Difference]: Without dead ends: 36881 [2022-01-18 17:52:23,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4699 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2523, Invalid=9467, Unknown=0, NotChecked=0, Total=11990 [2022-01-18 17:52:23,775 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 560 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:52:23,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 457 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:52:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36881 states. [2022-01-18 17:52:24,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36881 to 25310. [2022-01-18 17:52:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25310 states, 25309 states have (on average 4.022205539531392) internal successors, (101798), 25309 states have internal predecessors, (101798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:24,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25310 states to 25310 states and 101798 transitions. [2022-01-18 17:52:24,728 INFO L78 Accepts]: Start accepts. Automaton has 25310 states and 101798 transitions. Word has length 28 [2022-01-18 17:52:24,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:52:24,729 INFO L470 AbstractCegarLoop]: Abstraction has 25310 states and 101798 transitions. [2022-01-18 17:52:24,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:24,729 INFO L276 IsEmpty]: Start isEmpty. Operand 25310 states and 101798 transitions. [2022-01-18 17:52:24,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:52:24,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:52:24,774 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] [2022-01-18 17:52:24,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-01-18 17:52:24,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:24,974 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:52:24,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:52:24,974 INFO L85 PathProgramCache]: Analyzing trace with hash -2038513552, now seen corresponding path program 114 times [2022-01-18 17:52:24,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:52:24,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710204930] [2022-01-18 17:52:24,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:52:24,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:52:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:25,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:52:25,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710204930] [2022-01-18 17:52:25,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710204930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:52:25,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721567338] [2022-01-18 17:52:25,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:52:25,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:25,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:52:25,019 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:52:25,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-01-18 17:52:25,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 17:52:25,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:52:25,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:52:25,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:52:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:25,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:52:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:25,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721567338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:52:25,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:52:25,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-01-18 17:52:25,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209376726] [2022-01-18 17:52:25,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:52:25,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:52:25,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:52:25,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:52:25,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:52:25,240 INFO L87 Difference]: Start difference. First operand 25310 states and 101798 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:27,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:52:27,287 INFO L93 Difference]: Finished difference Result 37105 states and 141231 transitions. [2022-01-18 17:52:27,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-18 17:52:27,287 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:52:27,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:52:27,410 INFO L225 Difference]: With dead ends: 37105 [2022-01-18 17:52:27,410 INFO L226 Difference]: Without dead ends: 37093 [2022-01-18 17:52:27,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5383 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2694, Invalid=11112, Unknown=0, NotChecked=0, Total=13806 [2022-01-18 17:52:27,411 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 651 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:52:27,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 503 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:52:27,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37093 states. [2022-01-18 17:52:28,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37093 to 25416. [2022-01-18 17:52:28,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25416 states, 25415 states have (on average 4.018768443832382) internal successors, (102137), 25415 states have internal predecessors, (102137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25416 states to 25416 states and 102137 transitions. [2022-01-18 17:52:28,493 INFO L78 Accepts]: Start accepts. Automaton has 25416 states and 102137 transitions. Word has length 28 [2022-01-18 17:52:28,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:52:28,493 INFO L470 AbstractCegarLoop]: Abstraction has 25416 states and 102137 transitions. [2022-01-18 17:52:28,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:28,493 INFO L276 IsEmpty]: Start isEmpty. Operand 25416 states and 102137 transitions. [2022-01-18 17:52:28,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:52:28,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:52:28,539 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] [2022-01-18 17:52:28,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-01-18 17:52:28,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:28,739 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:52:28,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:52:28,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2061380766, now seen corresponding path program 70 times [2022-01-18 17:52:28,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:52:28,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64901475] [2022-01-18 17:52:28,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:52:28,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:52:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:28,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:52:28,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64901475] [2022-01-18 17:52:28,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64901475] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:52:28,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121896050] [2022-01-18 17:52:28,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:52:28,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:28,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:52:28,784 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:52:28,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-01-18 17:52:28,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:52:28,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:52:28,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:52:28,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:52:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:28,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:52:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:28,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121896050] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:52:28,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:52:28,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-01-18 17:52:28,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210915882] [2022-01-18 17:52:28,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:52:28,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:52:28,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:52:28,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:52:28,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:52:28,952 INFO L87 Difference]: Start difference. First operand 25416 states and 102137 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:29,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:52:29,795 INFO L93 Difference]: Finished difference Result 37614 states and 145573 transitions. [2022-01-18 17:52:29,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 17:52:29,795 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:52:29,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:52:30,106 INFO L225 Difference]: With dead ends: 37614 [2022-01-18 17:52:30,106 INFO L226 Difference]: Without dead ends: 37614 [2022-01-18 17:52:30,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=664, Invalid=2092, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 17:52:30,107 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 266 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:52:30,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 237 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:52:30,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37614 states. [2022-01-18 17:52:30,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37614 to 25510. [2022-01-18 17:52:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25510 states, 25509 states have (on average 4.016856795640754) internal successors, (102466), 25509 states have internal predecessors, (102466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:30,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25510 states to 25510 states and 102466 transitions. [2022-01-18 17:52:30,831 INFO L78 Accepts]: Start accepts. Automaton has 25510 states and 102466 transitions. Word has length 28 [2022-01-18 17:52:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:52:30,831 INFO L470 AbstractCegarLoop]: Abstraction has 25510 states and 102466 transitions. [2022-01-18 17:52:30,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:30,831 INFO L276 IsEmpty]: Start isEmpty. Operand 25510 states and 102466 transitions. [2022-01-18 17:52:30,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:52:30,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:52:30,874 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] [2022-01-18 17:52:30,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-01-18 17:52:31,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:31,074 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:52:31,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:52:31,074 INFO L85 PathProgramCache]: Analyzing trace with hash 290874174, now seen corresponding path program 71 times [2022-01-18 17:52:31,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:52:31,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366392875] [2022-01-18 17:52:31,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:52:31,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:52:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:31,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:52:31,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366392875] [2022-01-18 17:52:31,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366392875] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:52:31,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349319543] [2022-01-18 17:52:31,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:52:31,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:31,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:52:31,113 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:52:31,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-01-18 17:52:31,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 17:52:31,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:52:31,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:52:31,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:52:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:31,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:52:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:31,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349319543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:52:31,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:52:31,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 17:52:31,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307258989] [2022-01-18 17:52:31,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:52:31,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:52:31,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:52:31,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:52:31,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:52:31,277 INFO L87 Difference]: Start difference. First operand 25510 states and 102466 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:52:32,408 INFO L93 Difference]: Finished difference Result 38267 states and 147665 transitions. [2022-01-18 17:52:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 17:52:32,409 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:52:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:52:32,549 INFO L225 Difference]: With dead ends: 38267 [2022-01-18 17:52:32,550 INFO L226 Difference]: Without dead ends: 38267 [2022-01-18 17:52:32,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=869, Invalid=3421, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 17:52:32,550 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 330 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:52:32,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 198 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:52:32,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38267 states. [2022-01-18 17:52:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38267 to 25874. [2022-01-18 17:52:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25874 states, 25873 states have (on average 4.005488346925366) internal successors, (103634), 25873 states have internal predecessors, (103634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25874 states to 25874 states and 103634 transitions. [2022-01-18 17:52:33,570 INFO L78 Accepts]: Start accepts. Automaton has 25874 states and 103634 transitions. Word has length 28 [2022-01-18 17:52:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:52:33,571 INFO L470 AbstractCegarLoop]: Abstraction has 25874 states and 103634 transitions. [2022-01-18 17:52:33,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 25874 states and 103634 transitions. [2022-01-18 17:52:33,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:52:33,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:52:33,617 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] [2022-01-18 17:52:33,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-01-18 17:52:33,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:33,818 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:52:33,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:52:33,818 INFO L85 PathProgramCache]: Analyzing trace with hash -792148482, now seen corresponding path program 72 times [2022-01-18 17:52:33,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:52:33,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858226420] [2022-01-18 17:52:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:52:33,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:52:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:33,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:52:33,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858226420] [2022-01-18 17:52:33,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858226420] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:52:33,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921137684] [2022-01-18 17:52:33,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:52:33,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:33,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:52:33,855 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:52:33,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-01-18 17:52:33,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:52:33,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:52:33,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:52:33,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:52:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:33,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:52:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:52:34,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921137684] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:52:34,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:52:34,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2022-01-18 17:52:34,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296109598] [2022-01-18 17:52:34,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:52:34,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:52:34,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:52:34,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:52:34,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:52:34,039 INFO L87 Difference]: Start difference. First operand 25874 states and 103634 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 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) [2022-01-18 17:52:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:52:34,867 INFO L93 Difference]: Finished difference Result 34529 states and 136320 transitions. [2022-01-18 17:52:34,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 17:52:34,868 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 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 28 [2022-01-18 17:52:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:52:34,986 INFO L225 Difference]: With dead ends: 34529 [2022-01-18 17:52:34,986 INFO L226 Difference]: Without dead ends: 34466 [2022-01-18 17:52:34,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=392, Invalid=1168, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 17:52:34,986 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 207 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:52:34,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 233 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:52:35,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34466 states. [2022-01-18 17:52:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34466 to 30827. [2022-01-18 17:52:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30827 states, 30826 states have (on average 4.036397845974178) internal successors, (124426), 30826 states have internal predecessors, (124426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30827 states to 30827 states and 124426 transitions. [2022-01-18 17:52:35,907 INFO L78 Accepts]: Start accepts. Automaton has 30827 states and 124426 transitions. Word has length 28 [2022-01-18 17:52:35,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:52:35,907 INFO L470 AbstractCegarLoop]: Abstraction has 30827 states and 124426 transitions. [2022-01-18 17:52:35,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 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) [2022-01-18 17:52:35,907 INFO L276 IsEmpty]: Start isEmpty. Operand 30827 states and 124426 transitions. [2022-01-18 17:52:35,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:52:35,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:52:35,966 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] [2022-01-18 17:52:35,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-01-18 17:52:36,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:36,166 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:52:36,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:52:36,166 INFO L85 PathProgramCache]: Analyzing trace with hash 246053032, now seen corresponding path program 73 times [2022-01-18 17:52:36,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:52:36,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554708512] [2022-01-18 17:52:36,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:52:36,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:52:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:52:36,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:52:36,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554708512] [2022-01-18 17:52:36,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554708512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:52:36,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734419064] [2022-01-18 17:52:36,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:52:36,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:36,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:52:36,393 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:52:36,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-01-18 17:52:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:36,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:52:36,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:52:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:52:36,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:52:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:52:36,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734419064] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:52:36,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:52:36,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 17:52:36,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687729758] [2022-01-18 17:52:36,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:52:36,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:52:36,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:52:36,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:52:36,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:52:36,562 INFO L87 Difference]: Start difference. First operand 30827 states and 124426 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:37,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:52:37,343 INFO L93 Difference]: Finished difference Result 44298 states and 173391 transitions. [2022-01-18 17:52:37,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:52:37,344 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:52:37,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:52:37,512 INFO L225 Difference]: With dead ends: 44298 [2022-01-18 17:52:37,512 INFO L226 Difference]: Without dead ends: 44290 [2022-01-18 17:52:37,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=1743, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 17:52:37,513 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 375 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:52:37,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 147 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:52:37,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44290 states. [2022-01-18 17:52:38,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44290 to 30719. [2022-01-18 17:52:38,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30719 states, 30718 states have (on average 4.038348850836643) internal successors, (124050), 30718 states have internal predecessors, (124050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:38,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30719 states to 30719 states and 124050 transitions. [2022-01-18 17:52:38,792 INFO L78 Accepts]: Start accepts. Automaton has 30719 states and 124050 transitions. Word has length 28 [2022-01-18 17:52:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:52:38,793 INFO L470 AbstractCegarLoop]: Abstraction has 30719 states and 124050 transitions. [2022-01-18 17:52:38,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:38,793 INFO L276 IsEmpty]: Start isEmpty. Operand 30719 states and 124050 transitions. [2022-01-18 17:52:38,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:52:38,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:52:38,853 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] [2022-01-18 17:52:38,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-01-18 17:52:39,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-01-18 17:52:39,054 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:52:39,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:52:39,054 INFO L85 PathProgramCache]: Analyzing trace with hash 843389690, now seen corresponding path program 74 times [2022-01-18 17:52:39,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:52:39,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557996908] [2022-01-18 17:52:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:52:39,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:52:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:39,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:52:39,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557996908] [2022-01-18 17:52:39,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557996908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:52:39,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29291698] [2022-01-18 17:52:39,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:52:39,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:39,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:52:39,098 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:52:39,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-01-18 17:52:39,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:52:39,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:52:39,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:52:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:52:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:39,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:52:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:39,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29291698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:52:39,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:52:39,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-01-18 17:52:39,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262382681] [2022-01-18 17:52:39,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:52:39,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:52:39,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:52:39,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:52:39,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:52:39,259 INFO L87 Difference]: Start difference. First operand 30719 states and 124050 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:40,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:52:40,038 INFO L93 Difference]: Finished difference Result 44154 states and 172939 transitions. [2022-01-18 17:52:40,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 17:52:40,038 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:52:40,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:52:40,193 INFO L225 Difference]: With dead ends: 44154 [2022-01-18 17:52:40,193 INFO L226 Difference]: Without dead ends: 44142 [2022-01-18 17:52:40,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=552, Invalid=1898, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 17:52:40,194 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 353 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:52:40,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 187 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:52:40,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44142 states. [2022-01-18 17:52:41,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44142 to 30517. [2022-01-18 17:52:41,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30517 states, 30516 states have (on average 4.044599554332153) internal successors, (123425), 30516 states have internal predecessors, (123425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:41,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30517 states to 30517 states and 123425 transitions. [2022-01-18 17:52:41,412 INFO L78 Accepts]: Start accepts. Automaton has 30517 states and 123425 transitions. Word has length 28 [2022-01-18 17:52:41,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:52:41,412 INFO L470 AbstractCegarLoop]: Abstraction has 30517 states and 123425 transitions. [2022-01-18 17:52:41,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:41,413 INFO L276 IsEmpty]: Start isEmpty. Operand 30517 states and 123425 transitions. [2022-01-18 17:52:41,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:52:41,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:52:41,476 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] [2022-01-18 17:52:41,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-01-18 17:52:41,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-01-18 17:52:41,677 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:52:41,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:52:41,677 INFO L85 PathProgramCache]: Analyzing trace with hash -282838420, now seen corresponding path program 115 times [2022-01-18 17:52:41,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:52:41,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861162738] [2022-01-18 17:52:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:52:41,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:52:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:41,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:52:41,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861162738] [2022-01-18 17:52:41,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861162738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:52:41,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209436231] [2022-01-18 17:52:41,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:52:41,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:41,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:52:41,715 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:52:41,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-01-18 17:52:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:41,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:52:41,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:52:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:41,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:52:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:41,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209436231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:52:41,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:52:41,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-01-18 17:52:41,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585813691] [2022-01-18 17:52:41,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:52:41,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:52:41,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:52:41,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:52:41,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:52:41,915 INFO L87 Difference]: Start difference. First operand 30517 states and 123425 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:43,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:52:43,349 INFO L93 Difference]: Finished difference Result 60203 states and 227427 transitions. [2022-01-18 17:52:43,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 17:52:43,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:52:43,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:52:43,868 INFO L225 Difference]: With dead ends: 60203 [2022-01-18 17:52:43,868 INFO L226 Difference]: Without dead ends: 60203 [2022-01-18 17:52:43,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1449, Invalid=3663, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 17:52:43,868 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 343 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:52:43,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 259 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:52:43,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60203 states. [2022-01-18 17:52:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60203 to 39354. [2022-01-18 17:52:45,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39354 states, 39353 states have (on average 4.053744314283536) internal successors, (159527), 39353 states have internal predecessors, (159527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:45,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39354 states to 39354 states and 159527 transitions. [2022-01-18 17:52:45,190 INFO L78 Accepts]: Start accepts. Automaton has 39354 states and 159527 transitions. Word has length 28 [2022-01-18 17:52:45,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:52:45,190 INFO L470 AbstractCegarLoop]: Abstraction has 39354 states and 159527 transitions. [2022-01-18 17:52:45,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:45,190 INFO L276 IsEmpty]: Start isEmpty. Operand 39354 states and 159527 transitions. [2022-01-18 17:52:45,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:52:45,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:52:45,256 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] [2022-01-18 17:52:45,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-01-18 17:52:45,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-01-18 17:52:45,458 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:52:45,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:52:45,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1320645726, now seen corresponding path program 116 times [2022-01-18 17:52:45,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:52:45,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305324809] [2022-01-18 17:52:45,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:52:45,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:52:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:45,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:52:45,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305324809] [2022-01-18 17:52:45,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305324809] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:52:45,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444857156] [2022-01-18 17:52:45,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:52:45,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:45,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:52:45,499 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:52:45,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-01-18 17:52:45,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:52:45,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:52:45,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:52:45,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:52:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:45,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:52:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:45,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444857156] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:52:45,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:52:45,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-01-18 17:52:45,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770241025] [2022-01-18 17:52:45,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:52:45,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:52:45,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:52:45,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:52:45,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:52:45,647 INFO L87 Difference]: Start difference. First operand 39354 states and 159527 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:46,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:52:46,509 INFO L93 Difference]: Finished difference Result 57763 states and 228986 transitions. [2022-01-18 17:52:46,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 17:52:46,509 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:52:46,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:52:46,735 INFO L225 Difference]: With dead ends: 57763 [2022-01-18 17:52:46,735 INFO L226 Difference]: Without dead ends: 57691 [2022-01-18 17:52:46,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:52:46,736 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 188 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:52:46,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 139 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:52:46,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57691 states. [2022-01-18 17:52:48,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57691 to 45957. [2022-01-18 17:52:48,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45957 states, 45956 states have (on average 4.048024197058056) internal successors, (186031), 45956 states have internal predecessors, (186031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:48,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45957 states to 45957 states and 186031 transitions. [2022-01-18 17:52:48,553 INFO L78 Accepts]: Start accepts. Automaton has 45957 states and 186031 transitions. Word has length 28 [2022-01-18 17:52:48,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:52:48,553 INFO L470 AbstractCegarLoop]: Abstraction has 45957 states and 186031 transitions. [2022-01-18 17:52:48,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:48,553 INFO L276 IsEmpty]: Start isEmpty. Operand 45957 states and 186031 transitions. [2022-01-18 17:52:48,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:52:48,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:52:48,631 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] [2022-01-18 17:52:48,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-01-18 17:52:48,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:48,832 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:52:48,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:52:48,832 INFO L85 PathProgramCache]: Analyzing trace with hash 589421016, now seen corresponding path program 117 times [2022-01-18 17:52:48,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:52:48,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328288480] [2022-01-18 17:52:48,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:52:48,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:52:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:48,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:52:48,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328288480] [2022-01-18 17:52:48,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328288480] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:52:48,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515827752] [2022-01-18 17:52:48,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:52:48,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:48,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:52:48,869 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:52:48,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-01-18 17:52:48,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:52:48,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:52:48,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:52:48,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:52:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:48,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:52:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:49,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515827752] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:52:49,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:52:49,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-01-18 17:52:49,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390015428] [2022-01-18 17:52:49,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:52:49,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 17:52:49,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:52:49,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 17:52:49,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-18 17:52:49,017 INFO L87 Difference]: Start difference. First operand 45957 states and 186031 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:49,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:52:49,556 INFO L93 Difference]: Finished difference Result 51952 states and 204228 transitions. [2022-01-18 17:52:49,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 17:52:49,556 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:52:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:52:49,755 INFO L225 Difference]: With dead ends: 51952 [2022-01-18 17:52:49,755 INFO L226 Difference]: Without dead ends: 51952 [2022-01-18 17:52:49,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:52:49,755 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 166 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:52:49,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 182 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:52:49,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51952 states. [2022-01-18 17:52:51,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51952 to 45171. [2022-01-18 17:52:51,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45171 states, 45170 states have (on average 4.038454726588443) internal successors, (182417), 45170 states have internal predecessors, (182417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45171 states to 45171 states and 182417 transitions. [2022-01-18 17:52:51,410 INFO L78 Accepts]: Start accepts. Automaton has 45171 states and 182417 transitions. Word has length 28 [2022-01-18 17:52:51,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:52:51,410 INFO L470 AbstractCegarLoop]: Abstraction has 45171 states and 182417 transitions. [2022-01-18 17:52:51,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand 45171 states and 182417 transitions. [2022-01-18 17:52:51,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:52:51,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:52:51,487 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] [2022-01-18 17:52:51,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-01-18 17:52:51,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:51,687 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:52:51,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:52:51,687 INFO L85 PathProgramCache]: Analyzing trace with hash -362260422, now seen corresponding path program 118 times [2022-01-18 17:52:51,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:52:51,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496653530] [2022-01-18 17:52:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:52:51,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:52:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:51,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:52:51,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496653530] [2022-01-18 17:52:51,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496653530] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:52:51,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039662050] [2022-01-18 17:52:51,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:52:51,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:51,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:52:51,729 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:52:51,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-01-18 17:52:51,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:52:51,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:52:51,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:52:51,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:52:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:52:51,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:52:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:51,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039662050] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:52:51,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:52:51,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-01-18 17:52:51,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688386662] [2022-01-18 17:52:51,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:52:51,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:52:51,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:52:51,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:52:51,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:52:51,968 INFO L87 Difference]: Start difference. First operand 45171 states and 182417 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) [2022-01-18 17:52:55,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:52:55,050 INFO L93 Difference]: Finished difference Result 77610 states and 296031 transitions. [2022-01-18 17:52:55,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-18 17:52:55,050 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 28 [2022-01-18 17:52:55,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:52:55,371 INFO L225 Difference]: With dead ends: 77610 [2022-01-18 17:52:55,372 INFO L226 Difference]: Without dead ends: 77610 [2022-01-18 17:52:55,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9696 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4270, Invalid=17486, Unknown=0, NotChecked=0, Total=21756 [2022-01-18 17:52:55,373 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 630 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:52:55,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 425 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:52:55,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77610 states. [2022-01-18 17:52:57,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77610 to 45207. [2022-01-18 17:52:57,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45207 states, 45206 states have (on average 4.037804716188116) internal successors, (182533), 45206 states have internal predecessors, (182533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:52:57,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45207 states to 45207 states and 182533 transitions. [2022-01-18 17:52:57,442 INFO L78 Accepts]: Start accepts. Automaton has 45207 states and 182533 transitions. Word has length 28 [2022-01-18 17:52:57,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:52:57,442 INFO L470 AbstractCegarLoop]: Abstraction has 45207 states and 182533 transitions. [2022-01-18 17:52:57,442 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) [2022-01-18 17:52:57,442 INFO L276 IsEmpty]: Start isEmpty. Operand 45207 states and 182533 transitions. [2022-01-18 17:52:57,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:52:57,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:52:57,520 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] [2022-01-18 17:52:57,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-01-18 17:52:57,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:57,721 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:52:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:52:57,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1338579266, now seen corresponding path program 119 times [2022-01-18 17:52:57,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:52:57,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166634414] [2022-01-18 17:52:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:52:57,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:52:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:52:57,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:57,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:52:57,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166634414] [2022-01-18 17:52:57,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166634414] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:52:57,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062660835] [2022-01-18 17:52:57,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:52:57,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:52:57,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:52:57,762 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:52:57,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-01-18 17:52:57,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:52:57,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:52:57,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:52:57,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:52:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:52:57,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:52:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:52:58,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062660835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:52:58,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:52:58,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-01-18 17:52:58,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207379252] [2022-01-18 17:52:58,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:52:58,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:52:58,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:52:58,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:52:58,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:52:58,020 INFO L87 Difference]: Start difference. First operand 45207 states and 182533 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) [2022-01-18 17:53:02,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:53:02,979 INFO L93 Difference]: Finished difference Result 94449 states and 358545 transitions. [2022-01-18 17:53:02,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2022-01-18 17:53:02,979 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 28 [2022-01-18 17:53:02,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:53:03,720 INFO L225 Difference]: With dead ends: 94449 [2022-01-18 17:53:03,720 INFO L226 Difference]: Without dead ends: 94449 [2022-01-18 17:53:03,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25291 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9520, Invalid=43610, Unknown=0, NotChecked=0, Total=53130 [2022-01-18 17:53:03,722 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 992 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 2025 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 2025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:53:03,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [992 Valid, 645 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2025 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 17:53:03,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94449 states. [2022-01-18 17:53:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94449 to 45179. [2022-01-18 17:53:05,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45179 states, 45178 states have (on average 4.0393554384877595) internal successors, (182490), 45178 states have internal predecessors, (182490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45179 states to 45179 states and 182490 transitions. [2022-01-18 17:53:06,139 INFO L78 Accepts]: Start accepts. Automaton has 45179 states and 182490 transitions. Word has length 28 [2022-01-18 17:53:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:53:06,139 INFO L470 AbstractCegarLoop]: Abstraction has 45179 states and 182490 transitions. [2022-01-18 17:53:06,140 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) [2022-01-18 17:53:06,140 INFO L276 IsEmpty]: Start isEmpty. Operand 45179 states and 182490 transitions. [2022-01-18 17:53:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:53:06,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:53:06,219 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] [2022-01-18 17:53:06,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-01-18 17:53:06,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-01-18 17:53:06,419 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:53:06,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:53:06,420 INFO L85 PathProgramCache]: Analyzing trace with hash -771627186, now seen corresponding path program 120 times [2022-01-18 17:53:06,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:53:06,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231872241] [2022-01-18 17:53:06,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:53:06,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:53:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:53:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:06,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:53:06,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231872241] [2022-01-18 17:53:06,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231872241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:53:06,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076092650] [2022-01-18 17:53:06,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:53:06,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:06,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:53:06,461 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:53:06,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-01-18 17:53:06,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:53:06,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:53:06,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:53:06,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:53:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:53:06,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:53:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:06,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076092650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:53:06,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:53:06,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-01-18 17:53:06,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110287380] [2022-01-18 17:53:06,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:53:06,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:53:06,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:53:06,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:53:06,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:53:06,722 INFO L87 Difference]: Start difference. First operand 45179 states and 182490 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) [2022-01-18 17:53:09,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:53:09,760 INFO L93 Difference]: Finished difference Result 82332 states and 312702 transitions. [2022-01-18 17:53:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-18 17:53:09,760 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 28 [2022-01-18 17:53:09,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:53:10,084 INFO L225 Difference]: With dead ends: 82332 [2022-01-18 17:53:10,084 INFO L226 Difference]: Without dead ends: 82332 [2022-01-18 17:53:10,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10185 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4890, Invalid=17162, Unknown=0, NotChecked=0, Total=22052 [2022-01-18 17:53:10,085 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 847 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:53:10,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [847 Valid, 493 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:53:10,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82332 states. [2022-01-18 17:53:12,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82332 to 44519. [2022-01-18 17:53:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44519 states, 44518 states have (on average 4.029583539242553) internal successors, (179389), 44518 states have internal predecessors, (179389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44519 states to 44519 states and 179389 transitions. [2022-01-18 17:53:12,285 INFO L78 Accepts]: Start accepts. Automaton has 44519 states and 179389 transitions. Word has length 28 [2022-01-18 17:53:12,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:53:12,285 INFO L470 AbstractCegarLoop]: Abstraction has 44519 states and 179389 transitions. [2022-01-18 17:53:12,286 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) [2022-01-18 17:53:12,286 INFO L276 IsEmpty]: Start isEmpty. Operand 44519 states and 179389 transitions. [2022-01-18 17:53:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:53:12,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:53:12,370 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] [2022-01-18 17:53:12,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-01-18 17:53:12,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:12,571 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:53:12,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:53:12,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1545282486, now seen corresponding path program 121 times [2022-01-18 17:53:12,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:53:12,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281435097] [2022-01-18 17:53:12,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:53:12,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:53:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:53:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:12,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:53:12,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281435097] [2022-01-18 17:53:12,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281435097] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:53:12,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295969286] [2022-01-18 17:53:12,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:53:12,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:12,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:53:12,605 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:53:12,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-01-18 17:53:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:53:12,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:53:12,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:53:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:53:12,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:53:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:12,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295969286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:53:12,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:53:12,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2022-01-18 17:53:12,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542192645] [2022-01-18 17:53:12,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:53:12,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:53:12,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:53:12,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:53:12,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:53:12,794 INFO L87 Difference]: Start difference. First operand 44519 states and 179389 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) [2022-01-18 17:53:13,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:53:13,348 INFO L93 Difference]: Finished difference Result 64467 states and 251495 transitions. [2022-01-18 17:53:13,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 17:53:13,349 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 28 [2022-01-18 17:53:13,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:53:14,056 INFO L225 Difference]: With dead ends: 64467 [2022-01-18 17:53:14,056 INFO L226 Difference]: Without dead ends: 64445 [2022-01-18 17:53:14,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:53:14,056 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 264 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:53:14,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 77 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:53:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64445 states. [2022-01-18 17:53:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64445 to 44756. [2022-01-18 17:53:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44756 states, 44755 states have (on average 4.031348452686851) internal successors, (180423), 44755 states have internal predecessors, (180423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44756 states to 44756 states and 180423 transitions. [2022-01-18 17:53:15,534 INFO L78 Accepts]: Start accepts. Automaton has 44756 states and 180423 transitions. Word has length 28 [2022-01-18 17:53:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:53:15,534 INFO L470 AbstractCegarLoop]: Abstraction has 44756 states and 180423 transitions. [2022-01-18 17:53:15,534 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) [2022-01-18 17:53:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 44756 states and 180423 transitions. [2022-01-18 17:53:15,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:53:15,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:53:15,610 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] [2022-01-18 17:53:15,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-01-18 17:53:15,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:15,819 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:53:15,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:53:15,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1927343648, now seen corresponding path program 122 times [2022-01-18 17:53:15,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:53:15,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667463997] [2022-01-18 17:53:15,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:53:15,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:53:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:53:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:53:15,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:53:15,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667463997] [2022-01-18 17:53:15,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667463997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:53:15,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643059636] [2022-01-18 17:53:15,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:53:15,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:15,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:53:15,852 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:53:15,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-01-18 17:53:15,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:53:15,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:53:15,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:53:15,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:53:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:53:15,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:53:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:53:16,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643059636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:53:16,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:53:16,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2022-01-18 17:53:16,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412914245] [2022-01-18 17:53:16,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:53:16,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:53:16,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:53:16,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:53:16,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:53:16,042 INFO L87 Difference]: Start difference. First operand 44756 states and 180423 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) [2022-01-18 17:53:17,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:53:17,249 INFO L93 Difference]: Finished difference Result 77273 states and 292896 transitions. [2022-01-18 17:53:17,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 17:53:17,249 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 28 [2022-01-18 17:53:17,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:53:17,597 INFO L225 Difference]: With dead ends: 77273 [2022-01-18 17:53:17,597 INFO L226 Difference]: Without dead ends: 77273 [2022-01-18 17:53:17,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=462, Invalid=944, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:53:17,598 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 333 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:53:17,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 124 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:53:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77273 states. [2022-01-18 17:53:19,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77273 to 44235. [2022-01-18 17:53:19,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44235 states, 44234 states have (on average 4.0232626486413166) internal successors, (177965), 44234 states have internal predecessors, (177965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:19,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44235 states to 44235 states and 177965 transitions. [2022-01-18 17:53:19,288 INFO L78 Accepts]: Start accepts. Automaton has 44235 states and 177965 transitions. Word has length 28 [2022-01-18 17:53:19,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:53:19,289 INFO L470 AbstractCegarLoop]: Abstraction has 44235 states and 177965 transitions. [2022-01-18 17:53:19,289 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) [2022-01-18 17:53:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 44235 states and 177965 transitions. [2022-01-18 17:53:19,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:53:19,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:53:19,363 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] [2022-01-18 17:53:19,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-01-18 17:53:19,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:19,564 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:53:19,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:53:19,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1969871176, now seen corresponding path program 123 times [2022-01-18 17:53:19,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:53:19,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825879716] [2022-01-18 17:53:19,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:53:19,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:53:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:53:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:19,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:53:19,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825879716] [2022-01-18 17:53:19,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825879716] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:53:19,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525523647] [2022-01-18 17:53:19,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:53:19,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:19,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:53:19,606 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:53:19,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-01-18 17:53:19,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:53:19,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:53:19,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:53:19,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:53:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:53:19,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:53:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:19,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525523647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:53:19,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:53:19,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-01-18 17:53:19,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358125452] [2022-01-18 17:53:19,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:53:19,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:53:19,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:53:19,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:53:19,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:53:19,812 INFO L87 Difference]: Start difference. First operand 44235 states and 177965 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:22,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:53:22,233 INFO L93 Difference]: Finished difference Result 68843 states and 264341 transitions. [2022-01-18 17:53:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-18 17:53:22,233 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:53:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:53:22,518 INFO L225 Difference]: With dead ends: 68843 [2022-01-18 17:53:22,518 INFO L226 Difference]: Without dead ends: 68843 [2022-01-18 17:53:22,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6038 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2870, Invalid=11172, Unknown=0, NotChecked=0, Total=14042 [2022-01-18 17:53:22,519 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 586 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:53:22,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 338 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:53:22,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68843 states. [2022-01-18 17:53:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68843 to 44297. [2022-01-18 17:53:24,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44297 states, 44296 states have (on average 4.022259346216362) internal successors, (178170), 44296 states have internal predecessors, (178170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44297 states to 44297 states and 178170 transitions. [2022-01-18 17:53:24,617 INFO L78 Accepts]: Start accepts. Automaton has 44297 states and 178170 transitions. Word has length 28 [2022-01-18 17:53:24,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:53:24,617 INFO L470 AbstractCegarLoop]: Abstraction has 44297 states and 178170 transitions. [2022-01-18 17:53:24,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:24,617 INFO L276 IsEmpty]: Start isEmpty. Operand 44297 states and 178170 transitions. [2022-01-18 17:53:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:53:24,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:53:24,692 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] [2022-01-18 17:53:24,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-01-18 17:53:24,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:24,893 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:53:24,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:53:24,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1540182026, now seen corresponding path program 124 times [2022-01-18 17:53:24,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:53:24,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499572991] [2022-01-18 17:53:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:53:24,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:53:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:53:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:24,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:53:24,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499572991] [2022-01-18 17:53:24,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499572991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:53:24,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110342552] [2022-01-18 17:53:24,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:53:24,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:24,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:53:24,935 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:53:24,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-01-18 17:53:24,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:53:24,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:53:24,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:53:24,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:53:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:53:25,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:53:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:25,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110342552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:53:25,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:53:25,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-01-18 17:53:25,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247889000] [2022-01-18 17:53:25,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:53:25,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:53:25,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:53:25,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:53:25,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:53:25,140 INFO L87 Difference]: Start difference. First operand 44297 states and 178170 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:27,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:53:27,587 INFO L93 Difference]: Finished difference Result 70769 states and 270388 transitions. [2022-01-18 17:53:27,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-18 17:53:27,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:53:27,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:53:27,876 INFO L225 Difference]: With dead ends: 70769 [2022-01-18 17:53:27,876 INFO L226 Difference]: Without dead ends: 70769 [2022-01-18 17:53:27,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6812 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3012, Invalid=12990, Unknown=0, NotChecked=0, Total=16002 [2022-01-18 17:53:27,876 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 820 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:53:27,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 325 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:53:27,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70769 states. [2022-01-18 17:53:29,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70769 to 44871. [2022-01-18 17:53:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44871 states, 44870 states have (on average 4.010541564519723) internal successors, (179953), 44870 states have internal predecessors, (179953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:29,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44871 states to 44871 states and 179953 transitions. [2022-01-18 17:53:29,721 INFO L78 Accepts]: Start accepts. Automaton has 44871 states and 179953 transitions. Word has length 28 [2022-01-18 17:53:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:53:29,722 INFO L470 AbstractCegarLoop]: Abstraction has 44871 states and 179953 transitions. [2022-01-18 17:53:29,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 44871 states and 179953 transitions. [2022-01-18 17:53:29,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:53:29,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:53:29,798 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] [2022-01-18 17:53:29,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-01-18 17:53:29,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-01-18 17:53:29,998 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:53:29,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:53:29,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1585003168, now seen corresponding path program 125 times [2022-01-18 17:53:29,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:53:29,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821157271] [2022-01-18 17:53:29,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:53:29,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:53:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:53:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:30,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:53:30,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821157271] [2022-01-18 17:53:30,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821157271] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:53:30,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424210761] [2022-01-18 17:53:30,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:53:30,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:30,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:53:30,040 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:53:30,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-01-18 17:53:30,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:53:30,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:53:30,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:53:30,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:53:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:53:30,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:53:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:30,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424210761] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:53:30,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:53:30,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-01-18 17:53:30,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819128612] [2022-01-18 17:53:30,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:53:30,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:53:30,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:53:30,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:53:30,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:53:30,290 INFO L87 Difference]: Start difference. First operand 44871 states and 179953 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:53:32,332 INFO L93 Difference]: Finished difference Result 69361 states and 266662 transitions. [2022-01-18 17:53:32,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 17:53:32,332 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:53:32,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:53:32,597 INFO L225 Difference]: With dead ends: 69361 [2022-01-18 17:53:32,598 INFO L226 Difference]: Without dead ends: 69353 [2022-01-18 17:53:32,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3844 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2037, Invalid=7863, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 17:53:32,599 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 747 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:53:32,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 336 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:53:32,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69353 states. [2022-01-18 17:53:34,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69353 to 44732. [2022-01-18 17:53:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44732 states, 44731 states have (on average 4.011781538530326) internal successors, (179451), 44731 states have internal predecessors, (179451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44732 states to 44732 states and 179451 transitions. [2022-01-18 17:53:34,665 INFO L78 Accepts]: Start accepts. Automaton has 44732 states and 179451 transitions. Word has length 28 [2022-01-18 17:53:34,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:53:34,665 INFO L470 AbstractCegarLoop]: Abstraction has 44732 states and 179451 transitions. [2022-01-18 17:53:34,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:34,665 INFO L276 IsEmpty]: Start isEmpty. Operand 44732 states and 179451 transitions. [2022-01-18 17:53:34,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:53:34,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:53:34,742 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] [2022-01-18 17:53:34,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-01-18 17:53:34,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-01-18 17:53:34,942 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:53:34,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:53:34,942 INFO L85 PathProgramCache]: Analyzing trace with hash 838591832, now seen corresponding path program 126 times [2022-01-18 17:53:34,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:53:34,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717852244] [2022-01-18 17:53:34,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:53:34,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:53:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:53:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:53:34,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:53:34,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717852244] [2022-01-18 17:53:34,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717852244] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:53:34,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113780367] [2022-01-18 17:53:34,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:53:34,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:34,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:53:34,974 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:53:34,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-01-18 17:53:34,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:53:34,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:53:34,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:53:34,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:53:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 17:53:35,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:53:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:53:35,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113780367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:53:35,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:53:35,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 13 [2022-01-18 17:53:35,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651281246] [2022-01-18 17:53:35,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:53:35,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:53:35,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:53:35,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:53:35,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:53:35,144 INFO L87 Difference]: Start difference. First operand 44732 states and 179451 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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) [2022-01-18 17:53:35,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:53:35,728 INFO L93 Difference]: Finished difference Result 57230 states and 219298 transitions. [2022-01-18 17:53:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 17:53:35,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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 28 [2022-01-18 17:53:35,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:53:35,942 INFO L225 Difference]: With dead ends: 57230 [2022-01-18 17:53:35,942 INFO L226 Difference]: Without dead ends: 57230 [2022-01-18 17:53:35,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:53:35,942 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 201 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:53:35,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 123 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:53:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57230 states. [2022-01-18 17:53:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57230 to 44768. [2022-01-18 17:53:37,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44768 states, 44767 states have (on average 4.010521142806085) internal successors, (179539), 44767 states have internal predecessors, (179539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:37,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44768 states to 44768 states and 179539 transitions. [2022-01-18 17:53:37,783 INFO L78 Accepts]: Start accepts. Automaton has 44768 states and 179539 transitions. Word has length 28 [2022-01-18 17:53:37,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:53:37,783 INFO L470 AbstractCegarLoop]: Abstraction has 44768 states and 179539 transitions. [2022-01-18 17:53:37,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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) [2022-01-18 17:53:37,783 INFO L276 IsEmpty]: Start isEmpty. Operand 44768 states and 179539 transitions. [2022-01-18 17:53:37,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:53:37,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:53:37,862 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] [2022-01-18 17:53:37,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-01-18 17:53:38,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-01-18 17:53:38,063 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:53:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:53:38,063 INFO L85 PathProgramCache]: Analyzing trace with hash 210580514, now seen corresponding path program 127 times [2022-01-18 17:53:38,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:53:38,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812263309] [2022-01-18 17:53:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:53:38,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:53:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:53:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:38,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:53:38,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812263309] [2022-01-18 17:53:38,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812263309] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:53:38,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468185862] [2022-01-18 17:53:38,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:53:38,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:38,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:53:38,125 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:53:38,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-01-18 17:53:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:53:38,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:53:38,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:53:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:53:38,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:53:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:38,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468185862] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:53:38,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:53:38,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-01-18 17:53:38,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559753011] [2022-01-18 17:53:38,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:53:38,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:53:38,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:53:38,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:53:38,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:53:38,304 INFO L87 Difference]: Start difference. First operand 44768 states and 179539 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:39,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:53:39,860 INFO L93 Difference]: Finished difference Result 68624 states and 261728 transitions. [2022-01-18 17:53:39,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-18 17:53:39,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:53:39,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:53:40,132 INFO L225 Difference]: With dead ends: 68624 [2022-01-18 17:53:40,132 INFO L226 Difference]: Without dead ends: 68624 [2022-01-18 17:53:40,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1732, Invalid=6640, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 17:53:40,133 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 559 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:53:40,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 315 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:53:40,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68624 states. [2022-01-18 17:53:41,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68624 to 47094. [2022-01-18 17:53:41,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47094 states, 47093 states have (on average 4.014184698362814) internal successors, (189040), 47093 states have internal predecessors, (189040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:42,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47094 states to 47094 states and 189040 transitions. [2022-01-18 17:53:42,175 INFO L78 Accepts]: Start accepts. Automaton has 47094 states and 189040 transitions. Word has length 28 [2022-01-18 17:53:42,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:53:42,175 INFO L470 AbstractCegarLoop]: Abstraction has 47094 states and 189040 transitions. [2022-01-18 17:53:42,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:42,176 INFO L276 IsEmpty]: Start isEmpty. Operand 47094 states and 189040 transitions. [2022-01-18 17:53:42,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:53:42,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:53:42,257 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] [2022-01-18 17:53:42,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-01-18 17:53:42,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-01-18 17:53:42,457 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:53:42,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:53:42,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1629191814, now seen corresponding path program 128 times [2022-01-18 17:53:42,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:53:42,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075692197] [2022-01-18 17:53:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:53:42,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:53:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:53:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:42,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:53:42,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075692197] [2022-01-18 17:53:42,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075692197] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:53:42,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182341020] [2022-01-18 17:53:42,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:53:42,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:42,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:53:42,498 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:53:42,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-01-18 17:53:42,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:53:42,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:53:42,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:53:42,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:53:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:53:42,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:53:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:42,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182341020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:53:42,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:53:42,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-01-18 17:53:42,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113009096] [2022-01-18 17:53:42,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:53:42,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:53:42,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:53:42,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:53:42,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:53:42,676 INFO L87 Difference]: Start difference. First operand 47094 states and 189040 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:43,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:53:43,771 INFO L93 Difference]: Finished difference Result 64850 states and 251594 transitions. [2022-01-18 17:53:43,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 17:53:43,772 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:53:43,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:53:44,410 INFO L225 Difference]: With dead ends: 64850 [2022-01-18 17:53:44,410 INFO L226 Difference]: Without dead ends: 64826 [2022-01-18 17:53:44,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=911, Invalid=3511, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 17:53:44,411 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 566 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:53:44,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 192 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:53:44,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64826 states. [2022-01-18 17:53:45,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64826 to 47454. [2022-01-18 17:53:45,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47454 states, 47453 states have (on average 4.008176511495585) internal successors, (190200), 47453 states have internal predecessors, (190200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:46,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47454 states to 47454 states and 190200 transitions. [2022-01-18 17:53:46,133 INFO L78 Accepts]: Start accepts. Automaton has 47454 states and 190200 transitions. Word has length 28 [2022-01-18 17:53:46,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:53:46,133 INFO L470 AbstractCegarLoop]: Abstraction has 47454 states and 190200 transitions. [2022-01-18 17:53:46,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 47454 states and 190200 transitions. [2022-01-18 17:53:46,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:53:46,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:53:46,213 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] [2022-01-18 17:53:46,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-01-18 17:53:46,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:46,414 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:53:46,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:53:46,414 INFO L85 PathProgramCache]: Analyzing trace with hash 2034992166, now seen corresponding path program 129 times [2022-01-18 17:53:46,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:53:46,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351676966] [2022-01-18 17:53:46,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:53:46,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:53:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:53:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:53:46,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:53:46,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351676966] [2022-01-18 17:53:46,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351676966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:53:46,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103922060] [2022-01-18 17:53:46,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:53:46,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:46,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:53:46,446 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:53:46,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-01-18 17:53:46,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:53:46,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:53:46,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:53:46,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:53:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:53:46,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:53:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:53:46,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103922060] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:53:46,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:53:46,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-01-18 17:53:46,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219503537] [2022-01-18 17:53:46,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:53:46,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 17:53:46,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:53:46,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 17:53:46,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-18 17:53:46,605 INFO L87 Difference]: Start difference. First operand 47454 states and 190200 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:47,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:53:47,146 INFO L93 Difference]: Finished difference Result 55800 states and 217559 transitions. [2022-01-18 17:53:47,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 17:53:47,146 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:53:47,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:53:47,758 INFO L225 Difference]: With dead ends: 55800 [2022-01-18 17:53:47,758 INFO L226 Difference]: Without dead ends: 55800 [2022-01-18 17:53:47,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:53:47,759 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 167 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:53:47,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 97 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:53:47,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55800 states. [2022-01-18 17:53:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55800 to 48282. [2022-01-18 17:53:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48282 states, 48281 states have (on average 4.0046187941426235) internal successors, (193347), 48281 states have internal predecessors, (193347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48282 states to 48282 states and 193347 transitions. [2022-01-18 17:53:49,302 INFO L78 Accepts]: Start accepts. Automaton has 48282 states and 193347 transitions. Word has length 28 [2022-01-18 17:53:49,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:53:49,302 INFO L470 AbstractCegarLoop]: Abstraction has 48282 states and 193347 transitions. [2022-01-18 17:53:49,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 48282 states and 193347 transitions. [2022-01-18 17:53:49,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:53:49,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:53:49,385 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] [2022-01-18 17:53:49,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-01-18 17:53:49,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-01-18 17:53:49,585 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:53:49,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:53:49,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1816313562, now seen corresponding path program 130 times [2022-01-18 17:53:49,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:53:49,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750113327] [2022-01-18 17:53:49,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:53:49,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:53:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:53:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:49,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:53:49,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750113327] [2022-01-18 17:53:49,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750113327] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:53:49,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018288455] [2022-01-18 17:53:49,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:53:49,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:49,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:53:49,633 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:53:49,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-01-18 17:53:49,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:53:49,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:53:49,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:53:49,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:53:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:49,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:53:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:49,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018288455] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:53:49,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:53:49,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-01-18 17:53:49,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934074232] [2022-01-18 17:53:49,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:53:49,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:53:49,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:53:49,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:53:49,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:53:49,799 INFO L87 Difference]: Start difference. First operand 48282 states and 193347 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:50,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:53:50,948 INFO L93 Difference]: Finished difference Result 68374 states and 263131 transitions. [2022-01-18 17:53:50,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 17:53:50,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:53:50,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:53:51,211 INFO L225 Difference]: With dead ends: 68374 [2022-01-18 17:53:51,211 INFO L226 Difference]: Without dead ends: 68374 [2022-01-18 17:53:51,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=903, Invalid=3129, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:53:51,212 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 353 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:53:51,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 315 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:53:51,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68374 states. [2022-01-18 17:53:53,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68374 to 50506. [2022-01-18 17:53:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50506 states, 50505 states have (on average 3.9746361746361747) internal successors, (200739), 50505 states have internal predecessors, (200739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50506 states to 50506 states and 200739 transitions. [2022-01-18 17:53:53,336 INFO L78 Accepts]: Start accepts. Automaton has 50506 states and 200739 transitions. Word has length 28 [2022-01-18 17:53:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:53:53,336 INFO L470 AbstractCegarLoop]: Abstraction has 50506 states and 200739 transitions. [2022-01-18 17:53:53,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 50506 states and 200739 transitions. [2022-01-18 17:53:53,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:53:53,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:53:53,424 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] [2022-01-18 17:53:53,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-01-18 17:53:53,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-01-18 17:53:53,624 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:53:53,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:53:53,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1076220610, now seen corresponding path program 131 times [2022-01-18 17:53:53,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:53:53,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199047983] [2022-01-18 17:53:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:53:53,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:53:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:53:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:53,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:53:53,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199047983] [2022-01-18 17:53:53,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199047983] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:53:53,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309687298] [2022-01-18 17:53:53,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:53:53,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:53,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:53:53,669 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:53:53,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-01-18 17:53:53,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 17:53:53,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:53:53,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:53:53,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:53:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:53,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:53:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:53,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309687298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:53:53,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:53:53,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 17:53:53,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936996253] [2022-01-18 17:53:53,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:53:53,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:53:53,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:53:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:53:53,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:53:53,827 INFO L87 Difference]: Start difference. First operand 50506 states and 200739 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:55,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:53:55,136 INFO L93 Difference]: Finished difference Result 67321 states and 260301 transitions. [2022-01-18 17:53:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:53:55,136 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:53:55,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:53:55,474 INFO L225 Difference]: With dead ends: 67321 [2022-01-18 17:53:55,475 INFO L226 Difference]: Without dead ends: 67309 [2022-01-18 17:53:55,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=608, Invalid=2044, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 17:53:55,475 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 368 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:53:55,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 255 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:53:55,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67309 states. [2022-01-18 17:53:56,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67309 to 50308. [2022-01-18 17:53:57,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50308 states, 50307 states have (on average 3.978372791062874) internal successors, (200140), 50307 states have internal predecessors, (200140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50308 states to 50308 states and 200140 transitions. [2022-01-18 17:53:57,231 INFO L78 Accepts]: Start accepts. Automaton has 50308 states and 200140 transitions. Word has length 28 [2022-01-18 17:53:57,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:53:57,231 INFO L470 AbstractCegarLoop]: Abstraction has 50308 states and 200140 transitions. [2022-01-18 17:53:57,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:57,231 INFO L276 IsEmpty]: Start isEmpty. Operand 50308 states and 200140 transitions. [2022-01-18 17:53:57,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:53:57,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:53:57,319 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] [2022-01-18 17:53:57,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-01-18 17:53:57,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:57,520 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:53:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:53:57,520 INFO L85 PathProgramCache]: Analyzing trace with hash 373776318, now seen corresponding path program 132 times [2022-01-18 17:53:57,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:53:57,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096485091] [2022-01-18 17:53:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:53:57,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:53:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:53:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:57,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:53:57,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096485091] [2022-01-18 17:53:57,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096485091] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:53:57,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360445161] [2022-01-18 17:53:57,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:53:57,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:53:57,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:53:57,557 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:53:57,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-01-18 17:53:57,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:53:57,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:53:57,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:53:57,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:53:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:57,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:53:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:53:57,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360445161] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:53:57,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:53:57,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 17:53:57,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672409343] [2022-01-18 17:53:57,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:53:57,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:53:57,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:53:57,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:53:57,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:53:57,731 INFO L87 Difference]: Start difference. First operand 50308 states and 200140 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:53:59,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:53:59,216 INFO L93 Difference]: Finished difference Result 70042 states and 268957 transitions. [2022-01-18 17:53:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 17:53:59,216 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:53:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:53:59,496 INFO L225 Difference]: With dead ends: 70042 [2022-01-18 17:53:59,496 INFO L226 Difference]: Without dead ends: 70042 [2022-01-18 17:53:59,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=783, Invalid=2877, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:53:59,496 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 380 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:53:59,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 260 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:53:59,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70042 states. [2022-01-18 17:54:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70042 to 51798. [2022-01-18 17:54:01,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51798 states, 51797 states have (on average 3.956773558314188) internal successors, (204949), 51797 states have internal predecessors, (204949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51798 states to 51798 states and 204949 transitions. [2022-01-18 17:54:01,456 INFO L78 Accepts]: Start accepts. Automaton has 51798 states and 204949 transitions. Word has length 28 [2022-01-18 17:54:01,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:54:01,456 INFO L470 AbstractCegarLoop]: Abstraction has 51798 states and 204949 transitions. [2022-01-18 17:54:01,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:01,456 INFO L276 IsEmpty]: Start isEmpty. Operand 51798 states and 204949 transitions. [2022-01-18 17:54:01,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:54:01,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:54:01,546 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] [2022-01-18 17:54:01,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-01-18 17:54:01,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2022-01-18 17:54:01,746 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:54:01,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:54:01,746 INFO L85 PathProgramCache]: Analyzing trace with hash -709246338, now seen corresponding path program 133 times [2022-01-18 17:54:01,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:54:01,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403426611] [2022-01-18 17:54:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:01,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:54:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:01,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:54:01,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403426611] [2022-01-18 17:54:01,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403426611] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:54:01,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755274719] [2022-01-18 17:54:01,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:54:01,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:54:01,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:54:01,786 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:54:01,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-01-18 17:54:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:01,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:54:01,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:54:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:01,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:54:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:01,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755274719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:54:01,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:54:01,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-01-18 17:54:01,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102493240] [2022-01-18 17:54:01,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:54:01,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 17:54:01,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:54:01,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 17:54:01,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-18 17:54:01,925 INFO L87 Difference]: Start difference. First operand 51798 states and 204949 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:03,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:54:03,068 INFO L93 Difference]: Finished difference Result 61877 states and 240304 transitions. [2022-01-18 17:54:03,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 17:54:03,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:54:03,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:54:03,308 INFO L225 Difference]: With dead ends: 61877 [2022-01-18 17:54:03,308 INFO L226 Difference]: Without dead ends: 61857 [2022-01-18 17:54:03,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:54:03,308 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 191 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:54:03,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 102 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:54:03,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61857 states. [2022-01-18 17:54:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61857 to 57063. [2022-01-18 17:54:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57063 states, 57062 states have (on average 3.9566611755634225) internal successors, (225775), 57062 states have internal predecessors, (225775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57063 states to 57063 states and 225775 transitions. [2022-01-18 17:54:05,096 INFO L78 Accepts]: Start accepts. Automaton has 57063 states and 225775 transitions. Word has length 28 [2022-01-18 17:54:05,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:54:05,096 INFO L470 AbstractCegarLoop]: Abstraction has 57063 states and 225775 transitions. [2022-01-18 17:54:05,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:05,096 INFO L276 IsEmpty]: Start isEmpty. Operand 57063 states and 225775 transitions. [2022-01-18 17:54:05,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:54:05,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:54:05,606 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] [2022-01-18 17:54:05,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-01-18 17:54:05,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:54:05,807 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:54:05,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:54:05,807 INFO L85 PathProgramCache]: Analyzing trace with hash 761831780, now seen corresponding path program 134 times [2022-01-18 17:54:05,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:54:05,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771702066] [2022-01-18 17:54:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:05,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:54:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:05,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:54:05,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771702066] [2022-01-18 17:54:05,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771702066] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:54:05,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809708559] [2022-01-18 17:54:05,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:54:05,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:54:05,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:54:05,863 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:54:05,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-01-18 17:54:05,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:54:05,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:54:05,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:54:05,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:54:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:05,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:54:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:06,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809708559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:54:06,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:54:06,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-01-18 17:54:06,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799424171] [2022-01-18 17:54:06,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:54:06,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 17:54:06,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:54:06,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 17:54:06,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-18 17:54:06,010 INFO L87 Difference]: Start difference. First operand 57063 states and 225775 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:06,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:54:06,688 INFO L93 Difference]: Finished difference Result 63480 states and 245627 transitions. [2022-01-18 17:54:06,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 17:54:06,688 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:54:06,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:54:06,930 INFO L225 Difference]: With dead ends: 63480 [2022-01-18 17:54:06,931 INFO L226 Difference]: Without dead ends: 63480 [2022-01-18 17:54:06,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:54:06,931 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 174 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:54:06,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 177 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:54:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63480 states. [2022-01-18 17:54:08,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63480 to 56626. [2022-01-18 17:54:08,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56626 states, 56625 states have (on average 3.956150110375276) internal successors, (224017), 56625 states have internal predecessors, (224017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:09,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56626 states to 56626 states and 224017 transitions. [2022-01-18 17:54:09,111 INFO L78 Accepts]: Start accepts. Automaton has 56626 states and 224017 transitions. Word has length 28 [2022-01-18 17:54:09,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:54:09,111 INFO L470 AbstractCegarLoop]: Abstraction has 56626 states and 224017 transitions. [2022-01-18 17:54:09,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:09,112 INFO L276 IsEmpty]: Start isEmpty. Operand 56626 states and 224017 transitions. [2022-01-18 17:54:09,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:54:09,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:54:09,213 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] [2022-01-18 17:54:09,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-01-18 17:54:09,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-01-18 17:54:09,414 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:54:09,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:54:09,414 INFO L85 PathProgramCache]: Analyzing trace with hash 328955176, now seen corresponding path program 135 times [2022-01-18 17:54:09,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:54:09,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52119905] [2022-01-18 17:54:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:09,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:54:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:09,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:54:09,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52119905] [2022-01-18 17:54:09,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52119905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:54:09,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232118435] [2022-01-18 17:54:09,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:54:09,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:54:09,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:54:09,451 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:54:09,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-01-18 17:54:09,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:54:09,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:54:09,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:54:09,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:54:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:09,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:54:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:09,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232118435] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:54:09,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:54:09,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 17:54:09,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120811835] [2022-01-18 17:54:09,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:54:09,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:54:09,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:54:09,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:54:09,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:54:09,609 INFO L87 Difference]: Start difference. First operand 56626 states and 224017 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:54:10,549 INFO L93 Difference]: Finished difference Result 75421 states and 290550 transitions. [2022-01-18 17:54:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 17:54:10,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:54:10,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:54:10,835 INFO L225 Difference]: With dead ends: 75421 [2022-01-18 17:54:10,835 INFO L226 Difference]: Without dead ends: 75413 [2022-01-18 17:54:10,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=515, Invalid=1837, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 17:54:10,836 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 410 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:54:10,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 214 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:54:10,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75413 states. [2022-01-18 17:54:12,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75413 to 56574. [2022-01-18 17:54:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56574 states, 56573 states have (on average 3.9566400933307406) internal successors, (223839), 56573 states have internal predecessors, (223839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56574 states to 56574 states and 223839 transitions. [2022-01-18 17:54:13,037 INFO L78 Accepts]: Start accepts. Automaton has 56574 states and 223839 transitions. Word has length 28 [2022-01-18 17:54:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:54:13,037 INFO L470 AbstractCegarLoop]: Abstraction has 56574 states and 223839 transitions. [2022-01-18 17:54:13,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 56574 states and 223839 transitions. [2022-01-18 17:54:13,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:54:13,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:54:13,133 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] [2022-01-18 17:54:13,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-01-18 17:54:13,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-01-18 17:54:13,335 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:54:13,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:54:13,336 INFO L85 PathProgramCache]: Analyzing trace with hash -566865640, now seen corresponding path program 136 times [2022-01-18 17:54:13,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:54:13,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277227384] [2022-01-18 17:54:13,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:13,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:54:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:13,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:54:13,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:54:13,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277227384] [2022-01-18 17:54:13,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277227384] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:54:13,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221016756] [2022-01-18 17:54:13,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:54:13,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:54:13,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:54:13,374 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:54:13,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-01-18 17:54:13,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:54:13,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:54:13,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:54:13,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:54:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:54:13,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:54:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:54:13,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221016756] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:54:13,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:54:13,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-01-18 17:54:13,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7026095] [2022-01-18 17:54:13,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:54:13,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 17:54:13,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:54:13,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 17:54:13,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-18 17:54:13,561 INFO L87 Difference]: Start difference. First operand 56574 states and 223839 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:14,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:54:14,237 INFO L93 Difference]: Finished difference Result 63000 states and 244434 transitions. [2022-01-18 17:54:14,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 17:54:14,238 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:54:14,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:54:14,483 INFO L225 Difference]: With dead ends: 63000 [2022-01-18 17:54:14,483 INFO L226 Difference]: Without dead ends: 63000 [2022-01-18 17:54:14,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=608, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:54:14,483 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 162 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:54:14,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 136 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:54:14,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63000 states. [2022-01-18 17:54:16,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63000 to 57116. [2022-01-18 17:54:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57116 states, 57115 states have (on average 3.9546178762146544) internal successors, (225868), 57115 states have internal predecessors, (225868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57116 states to 57116 states and 225868 transitions. [2022-01-18 17:54:16,626 INFO L78 Accepts]: Start accepts. Automaton has 57116 states and 225868 transitions. Word has length 28 [2022-01-18 17:54:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:54:16,626 INFO L470 AbstractCegarLoop]: Abstraction has 57116 states and 225868 transitions. [2022-01-18 17:54:16,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 57116 states and 225868 transitions. [2022-01-18 17:54:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:54:16,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:54:16,727 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] [2022-01-18 17:54:16,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-01-18 17:54:16,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-01-18 17:54:16,927 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:54:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:54:16,928 INFO L85 PathProgramCache]: Analyzing trace with hash 926291834, now seen corresponding path program 137 times [2022-01-18 17:54:16,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:54:16,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903670978] [2022-01-18 17:54:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:16,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:54:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:54:16,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:54:16,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903670978] [2022-01-18 17:54:16,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903670978] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:54:16,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527843559] [2022-01-18 17:54:16,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:54:16,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:54:16,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:54:16,968 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:54:16,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-01-18 17:54:16,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:54:16,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:54:16,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:54:16,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:54:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:54:17,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:54:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:54:17,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527843559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:54:17,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:54:17,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 17:54:17,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139693093] [2022-01-18 17:54:17,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:54:17,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:54:17,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:54:17,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:54:17,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:54:17,130 INFO L87 Difference]: Start difference. First operand 57116 states and 225868 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:18,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:54:18,094 INFO L93 Difference]: Finished difference Result 76652 states and 295054 transitions. [2022-01-18 17:54:18,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:54:18,094 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:54:18,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:54:18,889 INFO L225 Difference]: With dead ends: 76652 [2022-01-18 17:54:18,889 INFO L226 Difference]: Without dead ends: 76628 [2022-01-18 17:54:18,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=502, Invalid=1850, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 17:54:18,890 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 382 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:54:18,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 225 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:54:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76628 states. [2022-01-18 17:54:20,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76628 to 57300. [2022-01-18 17:54:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57300 states, 57299 states have (on average 3.951901429344317) internal successors, (226440), 57299 states have internal predecessors, (226440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57300 states to 57300 states and 226440 transitions. [2022-01-18 17:54:20,767 INFO L78 Accepts]: Start accepts. Automaton has 57300 states and 226440 transitions. Word has length 28 [2022-01-18 17:54:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:54:20,767 INFO L470 AbstractCegarLoop]: Abstraction has 57300 states and 226440 transitions. [2022-01-18 17:54:20,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 57300 states and 226440 transitions. [2022-01-18 17:54:20,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:54:20,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:54:20,868 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] [2022-01-18 17:54:20,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-01-18 17:54:21,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-01-18 17:54:21,069 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:54:21,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:54:21,069 INFO L85 PathProgramCache]: Analyzing trace with hash -924717860, now seen corresponding path program 138 times [2022-01-18 17:54:21,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:54:21,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762756275] [2022-01-18 17:54:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:21,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:54:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:21,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:54:21,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762756275] [2022-01-18 17:54:21,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762756275] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:54:21,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997164315] [2022-01-18 17:54:21,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:54:21,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:54:21,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:54:21,113 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:54:21,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-01-18 17:54:21,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:54:21,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:54:21,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:54:21,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:54:21,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:21,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:54:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:21,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997164315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:54:21,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:54:21,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-01-18 17:54:21,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929941656] [2022-01-18 17:54:21,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:54:21,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:54:21,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:54:21,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:54:21,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:54:21,277 INFO L87 Difference]: Start difference. First operand 57300 states and 226440 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:22,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:54:22,439 INFO L93 Difference]: Finished difference Result 63521 states and 246283 transitions. [2022-01-18 17:54:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 17:54:22,452 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:54:22,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:54:22,701 INFO L225 Difference]: With dead ends: 63521 [2022-01-18 17:54:22,701 INFO L226 Difference]: Without dead ends: 63521 [2022-01-18 17:54:22,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:54:22,701 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 167 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:54:22,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 148 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:54:22,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63521 states. [2022-01-18 17:54:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63521 to 57223. [2022-01-18 17:54:24,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57223 states, 57222 states have (on average 3.952605641186956) internal successors, (226176), 57222 states have internal predecessors, (226176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57223 states to 57223 states and 226176 transitions. [2022-01-18 17:54:24,482 INFO L78 Accepts]: Start accepts. Automaton has 57223 states and 226176 transitions. Word has length 28 [2022-01-18 17:54:24,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:54:24,482 INFO L470 AbstractCegarLoop]: Abstraction has 57223 states and 226176 transitions. [2022-01-18 17:54:24,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 57223 states and 226176 transitions. [2022-01-18 17:54:24,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:54:24,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:54:24,582 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] [2022-01-18 17:54:24,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-01-18 17:54:24,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-01-18 17:54:24,782 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:54:24,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:54:24,783 INFO L85 PathProgramCache]: Analyzing trace with hash -66201730, now seen corresponding path program 139 times [2022-01-18 17:54:24,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:54:24,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037370122] [2022-01-18 17:54:24,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:24,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:54:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:24,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:54:24,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037370122] [2022-01-18 17:54:24,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037370122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:54:24,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659396734] [2022-01-18 17:54:24,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:54:24,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:54:24,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:54:24,825 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:54:24,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-01-18 17:54:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:24,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:54:24,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:54:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:24,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:54:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:24,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659396734] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:54:24,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:54:24,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-01-18 17:54:24,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645999864] [2022-01-18 17:54:24,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:54:24,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:54:24,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:54:24,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:54:24,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:54:24,988 INFO L87 Difference]: Start difference. First operand 57223 states and 226176 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:26,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:54:26,419 INFO L93 Difference]: Finished difference Result 76623 states and 294938 transitions. [2022-01-18 17:54:26,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:54:26,419 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:54:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:54:26,718 INFO L225 Difference]: With dead ends: 76623 [2022-01-18 17:54:26,718 INFO L226 Difference]: Without dead ends: 76583 [2022-01-18 17:54:26,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2278, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 17:54:26,718 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 408 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:54:26,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 221 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:54:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76583 states. [2022-01-18 17:54:28,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76583 to 57453. [2022-01-18 17:54:28,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57453 states, 57452 states have (on average 3.9494360509642834) internal successors, (226903), 57452 states have internal predecessors, (226903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57453 states to 57453 states and 226903 transitions. [2022-01-18 17:54:28,744 INFO L78 Accepts]: Start accepts. Automaton has 57453 states and 226903 transitions. Word has length 28 [2022-01-18 17:54:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:54:28,744 INFO L470 AbstractCegarLoop]: Abstraction has 57453 states and 226903 transitions. [2022-01-18 17:54:28,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:54:28,744 INFO L276 IsEmpty]: Start isEmpty. Operand 57453 states and 226903 transitions. [2022-01-18 17:54:29,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:54:29,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:54:29,231 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] [2022-01-18 17:54:29,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-01-18 17:54:29,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2022-01-18 17:54:29,453 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:54:29,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:54:29,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1972672318, now seen corresponding path program 140 times [2022-01-18 17:54:29,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:54:29,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712965505] [2022-01-18 17:54:29,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:54:29,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:54:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:54:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:29,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:54:29,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712965505] [2022-01-18 17:54:29,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712965505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:54:29,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603676915] [2022-01-18 17:54:29,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:54:29,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:54:29,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:54:29,490 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:54:29,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-01-18 17:54:29,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:54:29,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:54:29,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:54:29,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:54:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:29,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:54:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:54:29,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603676915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:54:29,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:54:29,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-01-18 17:54:29,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139452635] [2022-01-18 17:54:29,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:54:29,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:54:29,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:54:29,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:54:29,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:54:29,742 INFO L87 Difference]: Start difference. First operand 57453 states and 226903 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) [2022-01-18 17:54:33,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:54:33,544 INFO L93 Difference]: Finished difference Result 144483 states and 547142 transitions. [2022-01-18 17:54:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-01-18 17:54:33,544 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 28 [2022-01-18 17:54:33,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:54:34,188 INFO L225 Difference]: With dead ends: 144483 [2022-01-18 17:54:34,188 INFO L226 Difference]: Without dead ends: 144483 [2022-01-18 17:54:34,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11955 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5145, Invalid=21587, Unknown=0, NotChecked=0, Total=26732 [2022-01-18 17:54:34,189 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1035 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:54:34,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 373 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:54:34,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144483 states. Received shutdown request... [2022-01-18 17:54:35,240 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 17:54:35,253 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 [2022-01-18 17:54:35,253 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 17:54:35,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-01-18 17:54:35,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:54:35,454 WARN L594 AbstractCegarLoop]: Verification canceled: while executing MinimizeSevpa. [2022-01-18 17:54:35,455 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 17:54:35,455 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 17:54:35,455 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 17:54:35,458 INFO L732 BasicCegarLoop]: Path program histogram: [140, 74, 1, 1] [2022-01-18 17:54:35,459 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 17:54:35,459 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 17:54:35,461 INFO L202 PluginConnector]: Adding new model sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 05:54:35 BasicIcfg [2022-01-18 17:54:35,461 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 17:54:35,461 INFO L158 Benchmark]: Toolchain (without parser) took 736626.34ms. Allocated memory was 356.5MB in the beginning and 15.7GB in the end (delta: 15.4GB). Free memory was 316.9MB in the beginning and 12.7GB in the end (delta: -12.3GB). Peak memory consumption was 3.7GB. Max. memory is 16.0GB. [2022-01-18 17:54:35,461 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 356.5MB. Free memory is still 317.9MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 17:54:35,461 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.59ms. Allocated memory is still 356.5MB. Free memory was 316.8MB in the beginning and 315.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 17:54:35,462 INFO L158 Benchmark]: Boogie Preprocessor took 12.21ms. Allocated memory is still 356.5MB. Free memory was 315.3MB in the beginning and 314.3MB in the end (delta: 960.2kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 17:54:35,462 INFO L158 Benchmark]: RCFGBuilder took 218.55ms. Allocated memory is still 356.5MB. Free memory was 314.2MB in the beginning and 304.9MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 17:54:35,462 INFO L158 Benchmark]: TraceAbstraction took 736364.88ms. Allocated memory was 356.5MB in the beginning and 15.7GB in the end (delta: 15.4GB). Free memory was 304.5MB in the beginning and 12.7GB in the end (delta: -12.4GB). Peak memory consumption was 3.7GB. Max. memory is 16.0GB. [2022-01-18 17:54:35,462 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 0.13ms. Allocated memory is still 356.5MB. Free memory is still 317.9MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 26.59ms. Allocated memory is still 356.5MB. Free memory was 316.8MB in the beginning and 315.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 12.21ms. Allocated memory is still 356.5MB. Free memory was 315.3MB in the beginning and 314.3MB in the end (delta: 960.2kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 218.55ms. Allocated memory is still 356.5MB. Free memory was 314.2MB in the beginning and 304.9MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 736364.88ms. Allocated memory was 356.5MB in the beginning and 15.7GB in the end (delta: 15.4GB). Free memory was 304.5MB in the beginning and 12.7GB in the end (delta: -12.4GB). Peak memory consumption was 3.7GB. Max. memory is 16.0GB. * 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: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 59]: 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: 59]: 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. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 736.3s, OverallIterations: 216, TraceHistogramMax: 3, PathProgramHistogramMax: 140, EmptinessCheckTime: 5.1s, AutomataDifference: 454.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 88534 SdHoareTripleChecker+Valid, 113.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 88534 mSDsluCounter, 73506 SdHoareTripleChecker+Invalid, 95.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 24060 IncrementalHoareTripleChecker+Unchecked, 121756 mSDsCounter, 17587 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 230886 IncrementalHoareTripleChecker+Invalid, 272533 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17587 mSolverCounterUnsat, 6676 mSDtfsCounter, 230886 mSolverCounterSat, 0.7s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 25477 GetRequests, 8727 SyntacticMatches, 601 SemanticMatches, 16149 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 641800 ImplicationChecksByTransitivity, 330.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57453occurred in iteration=215, InterpolantAutomatonStates: 14216, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 88.6s AutomataMinimizationTime, 216 MinimizatonAttempts, 1390691 StatesRemovedByMinimization, 214 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 137.9s InterpolantComputationTime, 11334 NumberOfCodeBlocks, 11328 NumberOfCodeBlocksAsserted, 736 NumberOfCheckSat, 16338 ConstructedInterpolants, 363 QuantifiedInterpolants, 199457 SizeOfPredicates, 2218 NumberOfNonLiveVariables, 14743 ConjunctsInSsa, 3598 ConjunctsInUnsatCore, 644 InterpolantComputations, 2 PerfectInterpolantSequences, 1210/5023 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