/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:46:11,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:46:11,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:46:11,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:46:11,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:46:11,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:46:11,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:46:11,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:46:11,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:46:11,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:46:11,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:46:11,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:46:11,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:46:11,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:46:11,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:46:11,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:46:11,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:46:11,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:46:11,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:46:11,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:46:11,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:46:11,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:46:11,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:46:11,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:46:11,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 18:46:11,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 18:46:11,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 18:46:11,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 18:46:11,675 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 18:46:11,676 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 18:46:11,676 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 18:46:11,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 18:46:11,677 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 18:46:11,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:46:11,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:46:11,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:46:11,680 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-Delay.epf [2021-08-21 18:46:11,715 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:46:11,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:46:11,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:46:11,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:46:11,719 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:46:11,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:46:11,719 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:46:11,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:46:11,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:46:11,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:46:11,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:46:11,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:46:11,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:46:11,721 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:46:11,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:46:11,722 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:46:11,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:46:11,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:46:11,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:46:11,722 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:46:11,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:46:11,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:46:11,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:46:11,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:46:11,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:46:11,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:46:11,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:46:11,724 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:46:11,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:46:11,724 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:46:11,724 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:46:12,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:46:12,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:46:12,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:46:12,094 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:46:12,095 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:46:12,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl [2021-08-21 18:46:12,097 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl' [2021-08-21 18:46:12,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:46:12,126 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:46:12,128 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:46:12,128 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:46:12,128 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:46:12,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:12" (1/1) ... [2021-08-21 18:46:12,148 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:12" (1/1) ... [2021-08-21 18:46:12,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:46:12,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:46:12,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:46:12,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:46:12,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:12" (1/1) ... [2021-08-21 18:46:12,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:12" (1/1) ... [2021-08-21 18:46:12,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:12" (1/1) ... [2021-08-21 18:46:12,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:12" (1/1) ... [2021-08-21 18:46:12,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:12" (1/1) ... [2021-08-21 18:46:12,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:12" (1/1) ... [2021-08-21 18:46:12,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:12" (1/1) ... [2021-08-21 18:46:12,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:46:12,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:46:12,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:46:12,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:46:12,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:12" (1/1) ... [2021-08-21 18:46:12,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:46:12,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:12,210 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) [2021-08-21 18:46:12,237 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 [2021-08-21 18:46:12,261 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:46:12,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:46:12,261 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:46:12,262 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:46:12,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:46:12,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:46:12,262 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:46:12,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:46:12,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:46:12,263 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 18:46:12,263 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 18:46:12,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 18:46:12,264 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 18:46:12,432 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:46:12,432 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:46:12,434 INFO L202 PluginConnector]: Adding new model sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:46:12 BoogieIcfgContainer [2021-08-21 18:46:12,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:46:12,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:46:12,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:46:12,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:46:12,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:46:12" (1/2) ... [2021-08-21 18:46:12,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c3ead6 and model type sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:46:12, skipping insertion in model container [2021-08-21 18:46:12,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:46:12" (2/2) ... [2021-08-21 18:46:12,440 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-fun-alt.wvr.bpl [2021-08-21 18:46:12,444 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:46:12,444 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:46:12,444 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:46:12,444 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:46:12,508 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 18:46:12,574 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:46:12,581 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, mConcurrency=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 [2021-08-21 18:46:12,581 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 18:46:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 111 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:12,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 18:46:12,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:12,720 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:46:12,721 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:12,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:12,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1204265674, now seen corresponding path program 1 times [2021-08-21 18:46:12,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:12,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608796857] [2021-08-21 18:46:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:12,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:12,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:12,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608796857] [2021-08-21 18:46:12,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608796857] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:46:12,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:46:12,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:46:12,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246877700] [2021-08-21 18:46:12,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:46:12,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:12,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:46:12,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:46:12,992 INFO L87 Difference]: Start difference. First operand has 112 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 111 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:13,036 INFO L93 Difference]: Finished difference Result 217 states and 269 transitions. [2021-08-21 18:46:13,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:46:13,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 18:46:13,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:13,047 INFO L225 Difference]: With dead ends: 217 [2021-08-21 18:46:13,047 INFO L226 Difference]: Without dead ends: 64 [2021-08-21 18:46:13,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:46:13,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-21 18:46:13,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2021-08-21 18:46:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:13,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 74 transitions. [2021-08-21 18:46:13,086 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 74 transitions. Word has length 18 [2021-08-21 18:46:13,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:13,088 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 74 transitions. [2021-08-21 18:46:13,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 74 transitions. [2021-08-21 18:46:13,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:46:13,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:13,090 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:46:13,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:46:13,091 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:13,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:13,094 INFO L82 PathProgramCache]: Analyzing trace with hash -808242772, now seen corresponding path program 1 times [2021-08-21 18:46:13,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:13,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854662570] [2021-08-21 18:46:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:13,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:46:13,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:13,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854662570] [2021-08-21 18:46:13,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854662570] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:46:13,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:46:13,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:46:13,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168700569] [2021-08-21 18:46:13,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:46:13,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:13,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:46:13,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:46:13,178 INFO L87 Difference]: Start difference. First operand 45 states and 74 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) [2021-08-21 18:46:13,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:13,225 INFO L93 Difference]: Finished difference Result 55 states and 98 transitions. [2021-08-21 18:46:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:46:13,225 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 [2021-08-21 18:46:13,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:13,228 INFO L225 Difference]: With dead ends: 55 [2021-08-21 18:46:13,228 INFO L226 Difference]: Without dead ends: 55 [2021-08-21 18:46:13,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:46:13,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-21 18:46:13,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2021-08-21 18:46:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 80 transitions. [2021-08-21 18:46:13,239 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 80 transitions. Word has length 20 [2021-08-21 18:46:13,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:13,239 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 80 transitions. [2021-08-21 18:46:13,239 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) [2021-08-21 18:46:13,239 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 80 transitions. [2021-08-21 18:46:13,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:46:13,240 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:13,240 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:46:13,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:46:13,240 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:13,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:13,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1904417112, now seen corresponding path program 1 times [2021-08-21 18:46:13,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:13,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137864031] [2021-08-21 18:46:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:13,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:46:13,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:13,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137864031] [2021-08-21 18:46:13,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137864031] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:46:13,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:46:13,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:46:13,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021959116] [2021-08-21 18:46:13,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:46:13,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:13,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:46:13,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:46:13,287 INFO L87 Difference]: Start difference. First operand 48 states and 80 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:13,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:13,320 INFO L93 Difference]: Finished difference Result 66 states and 114 transitions. [2021-08-21 18:46:13,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:46:13,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:46:13,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:13,321 INFO L225 Difference]: With dead ends: 66 [2021-08-21 18:46:13,321 INFO L226 Difference]: Without dead ends: 66 [2021-08-21 18:46:13,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:46:13,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-21 18:46:13,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2021-08-21 18:46:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.75) internal successors, (98), 56 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 98 transitions. [2021-08-21 18:46:13,327 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 98 transitions. Word has length 20 [2021-08-21 18:46:13,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:13,327 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 98 transitions. [2021-08-21 18:46:13,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 98 transitions. [2021-08-21 18:46:13,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:46:13,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:13,328 INFO L512 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] [2021-08-21 18:46:13,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 18:46:13,329 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:13,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:13,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1105216778, now seen corresponding path program 1 times [2021-08-21 18:46:13,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:13,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294897891] [2021-08-21 18:46:13,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:13,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:13,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:13,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294897891] [2021-08-21 18:46:13,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294897891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:13,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231991328] [2021-08-21 18:46:13,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:13,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:13,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:13,673 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) [2021-08-21 18:46:13,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 18:46:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:13,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:46:13,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:14,189 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:46:14,190 INFO L388 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 33 treesize of output 29 [2021-08-21 18:46:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:14,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231991328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:14,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:14,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 18:46:14,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923638764] [2021-08-21 18:46:14,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:46:14,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:14,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:46:14,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:46:14,296 INFO L87 Difference]: Start difference. First operand 57 states and 98 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:14,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:14,613 INFO L93 Difference]: Finished difference Result 121 states and 202 transitions. [2021-08-21 18:46:14,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:46:14,613 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:46:14,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:14,618 INFO L225 Difference]: With dead ends: 121 [2021-08-21 18:46:14,618 INFO L226 Difference]: Without dead ends: 116 [2021-08-21 18:46:14,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 353.0ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:46:14,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-21 18:46:14,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-08-21 18:46:14,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.864864864864865) internal successors, (138), 74 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:14,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 138 transitions. [2021-08-21 18:46:14,634 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 138 transitions. Word has length 22 [2021-08-21 18:46:14,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:14,635 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 138 transitions. [2021-08-21 18:46:14,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:14,635 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 138 transitions. [2021-08-21 18:46:14,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:46:14,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:14,636 INFO L512 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] [2021-08-21 18:46:14,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:14,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:14,860 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:14,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:14,861 INFO L82 PathProgramCache]: Analyzing trace with hash -467167990, now seen corresponding path program 2 times [2021-08-21 18:46:14,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:14,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962365275] [2021-08-21 18:46:14,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:14,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:15,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:15,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962365275] [2021-08-21 18:46:15,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962365275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:15,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313939625] [2021-08-21 18:46:15,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:46:15,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:15,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:15,113 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) [2021-08-21 18:46:15,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 18:46:15,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:46:15,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:15,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:46:15,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:15,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:46:15,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-21 18:46:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:15,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313939625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:15,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:15,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 18:46:15,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647129302] [2021-08-21 18:46:15,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:46:15,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:15,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:46:15,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:46:15,664 INFO L87 Difference]: Start difference. First operand 75 states and 138 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:16,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:16,122 INFO L93 Difference]: Finished difference Result 159 states and 270 transitions. [2021-08-21 18:46:16,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:46:16,123 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:46:16,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:16,125 INFO L225 Difference]: With dead ends: 159 [2021-08-21 18:46:16,125 INFO L226 Difference]: Without dead ends: 154 [2021-08-21 18:46:16,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 421.3ms TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:46:16,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-21 18:46:16,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 77. [2021-08-21 18:46:16,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.881578947368421) internal successors, (143), 76 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 143 transitions. [2021-08-21 18:46:16,143 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 143 transitions. Word has length 22 [2021-08-21 18:46:16,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:16,143 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 143 transitions. [2021-08-21 18:46:16,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:16,143 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 143 transitions. [2021-08-21 18:46:16,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:46:16,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:16,144 INFO L512 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] [2021-08-21 18:46:16,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:16,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:16,372 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:16,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:16,372 INFO L82 PathProgramCache]: Analyzing trace with hash -640858166, now seen corresponding path program 3 times [2021-08-21 18:46:16,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:16,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765130536] [2021-08-21 18:46:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:16,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:16,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:16,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765130536] [2021-08-21 18:46:16,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765130536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:16,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420743253] [2021-08-21 18:46:16,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:46:16,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:16,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:16,581 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) [2021-08-21 18:46:16,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 18:46:16,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:46:16,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:16,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:46:16,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:16,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:46:16,941 INFO L388 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 30 treesize of output 31 [2021-08-21 18:46:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:17,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420743253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:17,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:17,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 18:46:17,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751109709] [2021-08-21 18:46:17,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:46:17,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:17,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:46:17,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:46:17,097 INFO L87 Difference]: Start difference. First operand 77 states and 143 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:17,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:17,384 INFO L93 Difference]: Finished difference Result 134 states and 237 transitions. [2021-08-21 18:46:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:46:17,385 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:46:17,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:17,386 INFO L225 Difference]: With dead ends: 134 [2021-08-21 18:46:17,386 INFO L226 Difference]: Without dead ends: 129 [2021-08-21 18:46:17,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 293.3ms TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:46:17,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-21 18:46:17,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2021-08-21 18:46:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.8875) internal successors, (151), 80 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 151 transitions. [2021-08-21 18:46:17,390 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 151 transitions. Word has length 22 [2021-08-21 18:46:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:17,391 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 151 transitions. [2021-08-21 18:46:17,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:17,391 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 151 transitions. [2021-08-21 18:46:17,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:46:17,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:17,392 INFO L512 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] [2021-08-21 18:46:17,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-21 18:46:17,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:17,609 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:17,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:17,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1444572436, now seen corresponding path program 4 times [2021-08-21 18:46:17,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:17,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154309711] [2021-08-21 18:46:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:17,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:17,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:17,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154309711] [2021-08-21 18:46:17,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154309711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:17,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485264921] [2021-08-21 18:46:17,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:46:17,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:17,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:17,717 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) [2021-08-21 18:46:17,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 18:46:17,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:46:17,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:17,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:46:17,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:18,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485264921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:18,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:18,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 18:46:18,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649992795] [2021-08-21 18:46:18,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:46:18,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:18,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:46:18,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:46:18,020 INFO L87 Difference]: Start difference. First operand 81 states and 151 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:18,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:18,212 INFO L93 Difference]: Finished difference Result 192 states and 333 transitions. [2021-08-21 18:46:18,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:46:18,212 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:46:18,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:18,213 INFO L225 Difference]: With dead ends: 192 [2021-08-21 18:46:18,213 INFO L226 Difference]: Without dead ends: 192 [2021-08-21 18:46:18,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:46:18,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-21 18:46:18,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 97. [2021-08-21 18:46:18,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:18,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-08-21 18:46:18,217 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 24 [2021-08-21 18:46:18,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:18,217 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-08-21 18:46:18,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:18,217 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-08-21 18:46:18,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:46:18,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:18,218 INFO L512 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] [2021-08-21 18:46:18,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:18,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:18,429 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:18,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:18,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1358899948, now seen corresponding path program 5 times [2021-08-21 18:46:18,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:18,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568418858] [2021-08-21 18:46:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:18,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:18,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:18,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568418858] [2021-08-21 18:46:18,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568418858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:18,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999152992] [2021-08-21 18:46:18,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:46:18,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:18,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:18,495 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) [2021-08-21 18:46:18,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 18:46:18,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:46:18,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:18,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:46:18,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:18,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999152992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:18,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:18,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 18:46:18,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055021099] [2021-08-21 18:46:18,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:46:18,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:18,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:46:18,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:46:18,832 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:19,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:19,214 INFO L93 Difference]: Finished difference Result 254 states and 436 transitions. [2021-08-21 18:46:19,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:46:19,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:46:19,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:19,216 INFO L225 Difference]: With dead ends: 254 [2021-08-21 18:46:19,216 INFO L226 Difference]: Without dead ends: 254 [2021-08-21 18:46:19,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:46:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-21 18:46:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 99. [2021-08-21 18:46:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-08-21 18:46:19,222 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 24 [2021-08-21 18:46:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:19,222 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-08-21 18:46:19,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-08-21 18:46:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:46:19,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:19,223 INFO L512 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] [2021-08-21 18:46:19,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:19,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:19,447 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:19,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:19,448 INFO L82 PathProgramCache]: Analyzing trace with hash -751378072, now seen corresponding path program 1 times [2021-08-21 18:46:19,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:19,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232328207] [2021-08-21 18:46:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:19,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:46:19,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:19,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232328207] [2021-08-21 18:46:19,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232328207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:19,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801666941] [2021-08-21 18:46:19,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:19,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:19,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:19,502 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) [2021-08-21 18:46:19,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 18:46:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:19,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:46:19,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:46:19,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801666941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:19,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:19,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 18:46:19,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193500923] [2021-08-21 18:46:19,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:46:19,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:19,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:46:19,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:46:19,802 INFO L87 Difference]: Start difference. First operand 99 states and 197 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:19,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:19,874 INFO L93 Difference]: Finished difference Result 206 states and 383 transitions. [2021-08-21 18:46:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:46:19,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:46:19,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:19,876 INFO L225 Difference]: With dead ends: 206 [2021-08-21 18:46:19,876 INFO L226 Difference]: Without dead ends: 206 [2021-08-21 18:46:19,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:46:19,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-21 18:46:19,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2021-08-21 18:46:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 146 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:19,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 301 transitions. [2021-08-21 18:46:19,884 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 301 transitions. Word has length 24 [2021-08-21 18:46:19,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:19,885 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 301 transitions. [2021-08-21 18:46:19,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:19,887 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 301 transitions. [2021-08-21 18:46:19,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:46:19,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:19,887 INFO L512 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] [2021-08-21 18:46:19,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:20,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:20,105 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:20,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:20,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1693841640, now seen corresponding path program 6 times [2021-08-21 18:46:20,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:20,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41787657] [2021-08-21 18:46:20,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:20,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:20,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:20,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41787657] [2021-08-21 18:46:20,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41787657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:20,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840320171] [2021-08-21 18:46:20,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:46:20,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:20,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:20,182 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) [2021-08-21 18:46:20,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 18:46:20,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:46:20,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:20,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:46:20,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:20,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840320171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:20,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:20,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 18:46:20,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484307643] [2021-08-21 18:46:20,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:46:20,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:46:20,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:46:20,548 INFO L87 Difference]: Start difference. First operand 147 states and 301 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:20,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:20,690 INFO L93 Difference]: Finished difference Result 230 states and 441 transitions. [2021-08-21 18:46:20,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:46:20,691 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:46:20,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:20,692 INFO L225 Difference]: With dead ends: 230 [2021-08-21 18:46:20,692 INFO L226 Difference]: Without dead ends: 218 [2021-08-21 18:46:20,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:46:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-21 18:46:20,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 183. [2021-08-21 18:46:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.043956043956044) internal successors, (372), 182 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 372 transitions. [2021-08-21 18:46:20,698 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 372 transitions. Word has length 24 [2021-08-21 18:46:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:20,698 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 372 transitions. [2021-08-21 18:46:20,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 372 transitions. [2021-08-21 18:46:20,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:46:20,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:20,699 INFO L512 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] [2021-08-21 18:46:20,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:20,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:20,921 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:20,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:20,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1547404952, now seen corresponding path program 2 times [2021-08-21 18:46:20,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:20,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536979984] [2021-08-21 18:46:20,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:20,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:46:20,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:20,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536979984] [2021-08-21 18:46:20,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536979984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:20,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182290917] [2021-08-21 18:46:20,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:46:20,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:20,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:20,986 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) [2021-08-21 18:46:20,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 18:46:21,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:46:21,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:21,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:46:21,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:46:21,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182290917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:21,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:21,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 18:46:21,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217221216] [2021-08-21 18:46:21,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:46:21,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:21,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:46:21,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:46:21,337 INFO L87 Difference]: Start difference. First operand 183 states and 372 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:21,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:21,438 INFO L93 Difference]: Finished difference Result 221 states and 420 transitions. [2021-08-21 18:46:21,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:46:21,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:46:21,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:21,440 INFO L225 Difference]: With dead ends: 221 [2021-08-21 18:46:21,440 INFO L226 Difference]: Without dead ends: 221 [2021-08-21 18:46:21,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:46:21,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-21 18:46:21,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 171. [2021-08-21 18:46:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.0058823529411764) internal successors, (341), 170 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 341 transitions. [2021-08-21 18:46:21,448 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 341 transitions. Word has length 24 [2021-08-21 18:46:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:21,449 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 341 transitions. [2021-08-21 18:46:21,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:21,449 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 341 transitions. [2021-08-21 18:46:21,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:46:21,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:21,451 INFO L512 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] [2021-08-21 18:46:21,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-21 18:46:21,664 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,SelfDestructingSolverStorable10 [2021-08-21 18:46:21,665 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:21,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:21,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2092221976, now seen corresponding path program 7 times [2021-08-21 18:46:21,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:21,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502518952] [2021-08-21 18:46:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:21,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:21,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:21,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502518952] [2021-08-21 18:46:21,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502518952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:21,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375107542] [2021-08-21 18:46:21,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:46:21,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:21,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:21,726 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) [2021-08-21 18:46:21,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 18:46:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:21,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:46:21,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:22,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375107542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:22,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:22,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 18:46:22,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783468046] [2021-08-21 18:46:22,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:46:22,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:22,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:46:22,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:46:22,096 INFO L87 Difference]: Start difference. First operand 171 states and 341 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:22,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:22,735 INFO L93 Difference]: Finished difference Result 577 states and 984 transitions. [2021-08-21 18:46:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:46:22,736 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:46:22,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:22,739 INFO L225 Difference]: With dead ends: 577 [2021-08-21 18:46:22,739 INFO L226 Difference]: Without dead ends: 577 [2021-08-21 18:46:22,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 432.9ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:46:22,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-21 18:46:22,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 183. [2021-08-21 18:46:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.0549450549450547) internal successors, (374), 182 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) [2021-08-21 18:46:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 374 transitions. [2021-08-21 18:46:22,758 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 374 transitions. Word has length 24 [2021-08-21 18:46:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:22,759 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 374 transitions. [2021-08-21 18:46:22,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 374 transitions. [2021-08-21 18:46:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:46:22,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:22,760 INFO L512 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] [2021-08-21 18:46:22,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:22,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:22,969 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:22,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:22,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1834399512, now seen corresponding path program 8 times [2021-08-21 18:46:22,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:22,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271266264] [2021-08-21 18:46:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:22,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:23,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:23,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271266264] [2021-08-21 18:46:23,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271266264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:23,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698259409] [2021-08-21 18:46:23,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:46:23,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:23,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:23,027 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) [2021-08-21 18:46:23,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 18:46:23,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:46:23,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:23,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:46:23,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:23,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698259409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:23,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:23,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 18:46:23,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297214967] [2021-08-21 18:46:23,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:46:23,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:23,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:46:23,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:46:23,399 INFO L87 Difference]: Start difference. First operand 183 states and 374 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:23,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:23,612 INFO L93 Difference]: Finished difference Result 355 states and 658 transitions. [2021-08-21 18:46:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:46:23,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:46:23,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:23,626 INFO L225 Difference]: With dead ends: 355 [2021-08-21 18:46:23,626 INFO L226 Difference]: Without dead ends: 351 [2021-08-21 18:46:23,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:46:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-08-21 18:46:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 240. [2021-08-21 18:46:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.1171548117154813) internal successors, (506), 239 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 506 transitions. [2021-08-21 18:46:23,634 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 506 transitions. Word has length 24 [2021-08-21 18:46:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:23,634 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 506 transitions. [2021-08-21 18:46:23,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:23,634 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 506 transitions. [2021-08-21 18:46:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:46:23,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:23,635 INFO L512 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] [2021-08-21 18:46:23,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:23,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 18:46:23,858 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:23,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:23,858 INFO L82 PathProgramCache]: Analyzing trace with hash 888183016, now seen corresponding path program 9 times [2021-08-21 18:46:23,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:23,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784805704] [2021-08-21 18:46:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:23,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:23,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:23,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784805704] [2021-08-21 18:46:23,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784805704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:23,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949476251] [2021-08-21 18:46:23,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:46:23,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:23,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:23,934 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) [2021-08-21 18:46:23,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 18:46:24,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:46:24,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:24,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:46:24,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:24,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949476251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:24,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:24,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 18:46:24,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466521245] [2021-08-21 18:46:24,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:46:24,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:24,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:46:24,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:46:24,297 INFO L87 Difference]: Start difference. First operand 240 states and 506 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:24,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:24,574 INFO L93 Difference]: Finished difference Result 370 states and 706 transitions. [2021-08-21 18:46:24,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:46:24,575 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:46:24,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:24,576 INFO L225 Difference]: With dead ends: 370 [2021-08-21 18:46:24,576 INFO L226 Difference]: Without dead ends: 370 [2021-08-21 18:46:24,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:46:24,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-08-21 18:46:24,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 253. [2021-08-21 18:46:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.0952380952380953) internal successors, (528), 252 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:24,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 528 transitions. [2021-08-21 18:46:24,584 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 528 transitions. Word has length 24 [2021-08-21 18:46:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:24,584 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 528 transitions. [2021-08-21 18:46:24,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:24,585 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 528 transitions. [2021-08-21 18:46:24,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:46:24,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:24,586 INFO L512 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] [2021-08-21 18:46:24,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-21 18:46:24,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 18:46:24,805 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:24,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:24,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1801158104, now seen corresponding path program 3 times [2021-08-21 18:46:24,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:24,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294694388] [2021-08-21 18:46:24,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:24,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:46:24,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:24,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294694388] [2021-08-21 18:46:24,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294694388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:24,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976940562] [2021-08-21 18:46:24,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:46:24,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:24,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:24,867 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) [2021-08-21 18:46:24,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 18:46:25,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:46:25,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:25,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:46:25,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:46:25,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976940562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:25,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:25,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-21 18:46:25,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180560368] [2021-08-21 18:46:25,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:46:25,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:25,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:46:25,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:46:25,188 INFO L87 Difference]: Start difference. First operand 253 states and 528 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:25,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:25,281 INFO L93 Difference]: Finished difference Result 273 states and 566 transitions. [2021-08-21 18:46:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:46:25,282 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:46:25,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:25,283 INFO L225 Difference]: With dead ends: 273 [2021-08-21 18:46:25,283 INFO L226 Difference]: Without dead ends: 273 [2021-08-21 18:46:25,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:46:25,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-08-21 18:46:25,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 233. [2021-08-21 18:46:25,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.1293103448275863) internal successors, (494), 232 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 494 transitions. [2021-08-21 18:46:25,289 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 494 transitions. Word has length 24 [2021-08-21 18:46:25,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:25,289 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 494 transitions. [2021-08-21 18:46:25,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:25,289 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 494 transitions. [2021-08-21 18:46:25,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:46:25,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:25,290 INFO L512 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] [2021-08-21 18:46:25,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:25,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 18:46:25,513 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:25,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:25,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1504756568, now seen corresponding path program 10 times [2021-08-21 18:46:25,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:25,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668903508] [2021-08-21 18:46:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:25,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:25,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:25,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668903508] [2021-08-21 18:46:25,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668903508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:25,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649988578] [2021-08-21 18:46:25,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:46:25,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:25,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:25,584 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) [2021-08-21 18:46:25,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 18:46:25,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:46:25,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:25,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:46:25,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:25,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649988578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:25,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:25,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 18:46:25,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630345375] [2021-08-21 18:46:25,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:46:25,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:25,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:46:25,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:46:25,987 INFO L87 Difference]: Start difference. First operand 233 states and 494 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:26,321 INFO L93 Difference]: Finished difference Result 604 states and 1149 transitions. [2021-08-21 18:46:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:46:26,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:46:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:26,324 INFO L225 Difference]: With dead ends: 604 [2021-08-21 18:46:26,324 INFO L226 Difference]: Without dead ends: 604 [2021-08-21 18:46:26,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:46:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-21 18:46:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 283. [2021-08-21 18:46:26,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.1702127659574466) internal successors, (612), 282 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:26,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 612 transitions. [2021-08-21 18:46:26,335 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 612 transitions. Word has length 24 [2021-08-21 18:46:26,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:26,335 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 612 transitions. [2021-08-21 18:46:26,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:26,336 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 612 transitions. [2021-08-21 18:46:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:46:26,336 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:26,337 INFO L512 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] [2021-08-21 18:46:26,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:26,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 18:46:26,553 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:26,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:26,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1327513290, now seen corresponding path program 4 times [2021-08-21 18:46:26,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:26,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20494244] [2021-08-21 18:46:26,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:26,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:26,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:26,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20494244] [2021-08-21 18:46:26,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20494244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:26,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501819182] [2021-08-21 18:46:26,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:46:26,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:26,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:26,883 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) [2021-08-21 18:46:26,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 18:46:27,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:46:27,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:27,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:46:27,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:27,711 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:46:27,711 INFO L388 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 25 treesize of output 20 [2021-08-21 18:46:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:27,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501819182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:27,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:27,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 18:46:27,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941257769] [2021-08-21 18:46:27,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:46:27,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:27,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:46:27,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:46:27,763 INFO L87 Difference]: Start difference. First operand 283 states and 612 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2021-08-21 18:46:28,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:28,133 INFO L93 Difference]: Finished difference Result 420 states and 858 transitions. [2021-08-21 18:46:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:46:28,133 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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 26 [2021-08-21 18:46:28,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:28,135 INFO L225 Difference]: With dead ends: 420 [2021-08-21 18:46:28,135 INFO L226 Difference]: Without dead ends: 415 [2021-08-21 18:46:28,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:46:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-21 18:46:28,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 292. [2021-08-21 18:46:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.178694158075601) internal successors, (634), 291 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 634 transitions. [2021-08-21 18:46:28,144 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 634 transitions. Word has length 26 [2021-08-21 18:46:28,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:28,144 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 634 transitions. [2021-08-21 18:46:28,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2021-08-21 18:46:28,144 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 634 transitions. [2021-08-21 18:46:28,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:46:28,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:28,145 INFO L512 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] [2021-08-21 18:46:28,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:28,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:28,369 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:28,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:28,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1581302414, now seen corresponding path program 5 times [2021-08-21 18:46:28,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:28,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881503042] [2021-08-21 18:46:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:28,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:28,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:28,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881503042] [2021-08-21 18:46:28,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881503042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:28,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179691223] [2021-08-21 18:46:28,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:46:28,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:28,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:28,713 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) [2021-08-21 18:46:28,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 18:46:29,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:46:29,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:29,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:46:29,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:29,513 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:46:29,514 INFO L388 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 25 treesize of output 20 [2021-08-21 18:46:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:29,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179691223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:29,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:29,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 18:46:29,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670676130] [2021-08-21 18:46:29,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:46:29,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:29,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:46:29,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:46:29,591 INFO L87 Difference]: Start difference. First operand 292 states and 634 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-08-21 18:46:30,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:30,193 INFO L93 Difference]: Finished difference Result 415 states and 845 transitions. [2021-08-21 18:46:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:46:30,193 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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 26 [2021-08-21 18:46:30,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:30,195 INFO L225 Difference]: With dead ends: 415 [2021-08-21 18:46:30,195 INFO L226 Difference]: Without dead ends: 410 [2021-08-21 18:46:30,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 639.5ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:46:30,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-21 18:46:30,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 296. [2021-08-21 18:46:30,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.169491525423729) internal successors, (640), 295 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) [2021-08-21 18:46:30,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 640 transitions. [2021-08-21 18:46:30,203 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 640 transitions. Word has length 26 [2021-08-21 18:46:30,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:30,204 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 640 transitions. [2021-08-21 18:46:30,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-08-21 18:46:30,205 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 640 transitions. [2021-08-21 18:46:30,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:46:30,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:30,205 INFO L512 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] [2021-08-21 18:46:30,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:30,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 18:46:30,421 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:30,421 INFO L82 PathProgramCache]: Analyzing trace with hash -522234294, now seen corresponding path program 11 times [2021-08-21 18:46:30,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:30,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717248220] [2021-08-21 18:46:30,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:30,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:30,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:30,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717248220] [2021-08-21 18:46:30,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717248220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:30,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792000594] [2021-08-21 18:46:30,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:46:30,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:30,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:30,864 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) [2021-08-21 18:46:30,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 18:46:31,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:46:31,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:31,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:46:31,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:31,564 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 18:46:31,565 INFO L388 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 27 treesize of output 23 [2021-08-21 18:46:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:31,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792000594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:31,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:31,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 18:46:31,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060756160] [2021-08-21 18:46:31,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:46:31,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:31,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:46:31,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:46:31,624 INFO L87 Difference]: Start difference. First operand 296 states and 640 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-08-21 18:46:32,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:32,739 INFO L93 Difference]: Finished difference Result 358 states and 728 transitions. [2021-08-21 18:46:32,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:46:32,739 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 26 [2021-08-21 18:46:32,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:32,741 INFO L225 Difference]: With dead ends: 358 [2021-08-21 18:46:32,741 INFO L226 Difference]: Without dead ends: 353 [2021-08-21 18:46:32,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1112.9ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:46:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-08-21 18:46:32,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 304. [2021-08-21 18:46:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.155115511551155) internal successors, (653), 303 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 653 transitions. [2021-08-21 18:46:32,749 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 653 transitions. Word has length 26 [2021-08-21 18:46:32,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:32,749 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 653 transitions. [2021-08-21 18:46:32,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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) [2021-08-21 18:46:32,749 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 653 transitions. [2021-08-21 18:46:32,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:46:32,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:32,750 INFO L512 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] [2021-08-21 18:46:32,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:32,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:32,965 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:32,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:32,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1437337910, now seen corresponding path program 6 times [2021-08-21 18:46:32,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:32,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691340571] [2021-08-21 18:46:32,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:32,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:33,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:33,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691340571] [2021-08-21 18:46:33,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691340571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:33,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46325897] [2021-08-21 18:46:33,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:46:33,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:33,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:33,210 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) [2021-08-21 18:46:33,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 18:46:33,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:46:33,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:33,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:46:33,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:33,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:46:33,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:46:33,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-21 18:46:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:34,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46325897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:34,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:34,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 18:46:34,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836573648] [2021-08-21 18:46:34,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:46:34,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:34,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:46:34,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:46:34,007 INFO L87 Difference]: Start difference. First operand 304 states and 653 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-08-21 18:46:35,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:35,139 INFO L93 Difference]: Finished difference Result 508 states and 997 transitions. [2021-08-21 18:46:35,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:46:35,139 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:46:35,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:35,141 INFO L225 Difference]: With dead ends: 508 [2021-08-21 18:46:35,141 INFO L226 Difference]: Without dead ends: 503 [2021-08-21 18:46:35,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 916.5ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:46:35,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-21 18:46:35,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 310. [2021-08-21 18:46:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.168284789644013) internal successors, (670), 309 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:35,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 670 transitions. [2021-08-21 18:46:35,153 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 670 transitions. Word has length 26 [2021-08-21 18:46:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:35,154 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 670 transitions. [2021-08-21 18:46:35,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-08-21 18:46:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 670 transitions. [2021-08-21 18:46:35,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:46:35,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:35,155 INFO L512 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] [2021-08-21 18:46:35,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:35,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:35,377 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:35,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:35,378 INFO L82 PathProgramCache]: Analyzing trace with hash 531486410, now seen corresponding path program 7 times [2021-08-21 18:46:35,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:35,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561700398] [2021-08-21 18:46:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:35,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:35,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:35,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561700398] [2021-08-21 18:46:35,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561700398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:35,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099531860] [2021-08-21 18:46:35,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:46:35,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:35,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:35,620 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) [2021-08-21 18:46:35,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 18:46:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:36,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:46:36,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:36,470 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:46:36,471 INFO L388 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 25 treesize of output 20 [2021-08-21 18:46:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:36,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099531860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:36,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:36,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 18:46:36,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099642822] [2021-08-21 18:46:36,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:46:36,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:36,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:46:36,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:46:36,530 INFO L87 Difference]: Start difference. First operand 310 states and 670 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2021-08-21 18:46:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:37,273 INFO L93 Difference]: Finished difference Result 532 states and 1070 transitions. [2021-08-21 18:46:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:46:37,273 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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 26 [2021-08-21 18:46:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:37,275 INFO L225 Difference]: With dead ends: 532 [2021-08-21 18:46:37,275 INFO L226 Difference]: Without dead ends: 527 [2021-08-21 18:46:37,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 641.4ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:46:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-08-21 18:46:37,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 314. [2021-08-21 18:46:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.1725239616613417) internal successors, (680), 313 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:37,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 680 transitions. [2021-08-21 18:46:37,284 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 680 transitions. Word has length 26 [2021-08-21 18:46:37,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:37,284 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 680 transitions. [2021-08-21 18:46:37,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2021-08-21 18:46:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 680 transitions. [2021-08-21 18:46:37,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:46:37,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:37,285 INFO L512 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] [2021-08-21 18:46:37,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:37,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:37,503 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:37,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:37,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1040898358, now seen corresponding path program 8 times [2021-08-21 18:46:37,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:37,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511340345] [2021-08-21 18:46:37,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:37,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:37,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:37,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511340345] [2021-08-21 18:46:37,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511340345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:37,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417730722] [2021-08-21 18:46:37,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:46:37,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:37,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:37,741 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) [2021-08-21 18:46:37,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 18:46:38,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:46:38,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:38,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:46:38,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:38,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:46:38,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:46:38,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-21 18:46:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:38,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417730722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:38,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:38,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 18:46:38,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641899186] [2021-08-21 18:46:38,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:46:38,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:38,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:46:38,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:46:38,594 INFO L87 Difference]: Start difference. First operand 314 states and 680 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-08-21 18:46:39,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:39,818 INFO L93 Difference]: Finished difference Result 591 states and 1182 transitions. [2021-08-21 18:46:39,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:46:39,820 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:46:39,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:39,822 INFO L225 Difference]: With dead ends: 591 [2021-08-21 18:46:39,822 INFO L226 Difference]: Without dead ends: 586 [2021-08-21 18:46:39,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 982.2ms TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:46:39,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-08-21 18:46:39,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 315. [2021-08-21 18:46:39,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.1687898089171975) internal successors, (681), 314 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 681 transitions. [2021-08-21 18:46:39,830 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 681 transitions. Word has length 26 [2021-08-21 18:46:39,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:39,831 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 681 transitions. [2021-08-21 18:46:39,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-08-21 18:46:39,831 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 681 transitions. [2021-08-21 18:46:39,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:46:39,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:39,832 INFO L512 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] [2021-08-21 18:46:39,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:40,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:40,057 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:40,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:40,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1139814798, now seen corresponding path program 9 times [2021-08-21 18:46:40,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:40,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132543482] [2021-08-21 18:46:40,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:40,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:40,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:40,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132543482] [2021-08-21 18:46:40,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132543482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:40,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711729171] [2021-08-21 18:46:40,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:46:40,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:40,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:40,285 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) [2021-08-21 18:46:40,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 18:46:40,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:46:40,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:40,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:46:40,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:41,243 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 18:46:41,243 INFO L388 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 35 treesize of output 43 [2021-08-21 18:46:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:41,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711729171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:41,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:41,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 18:46:41,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986517286] [2021-08-21 18:46:41,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:46:41,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:41,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:46:41,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:46:41,641 INFO L87 Difference]: Start difference. First operand 315 states and 681 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-21 18:46:42,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:42,631 INFO L93 Difference]: Finished difference Result 612 states and 1215 transitions. [2021-08-21 18:46:42,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:46:42,631 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:46:42,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:42,634 INFO L225 Difference]: With dead ends: 612 [2021-08-21 18:46:42,634 INFO L226 Difference]: Without dead ends: 607 [2021-08-21 18:46:42,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 875.3ms TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:46:42,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-08-21 18:46:42,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 316. [2021-08-21 18:46:42,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.165079365079365) internal successors, (682), 315 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:42,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 682 transitions. [2021-08-21 18:46:42,642 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 682 transitions. Word has length 26 [2021-08-21 18:46:42,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:42,643 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 682 transitions. [2021-08-21 18:46:42,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-21 18:46:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 682 transitions. [2021-08-21 18:46:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:46:42,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:42,644 INFO L512 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] [2021-08-21 18:46:42,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-21 18:46:42,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 18:46:42,849 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:42,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:42,849 INFO L82 PathProgramCache]: Analyzing trace with hash 244491850, now seen corresponding path program 12 times [2021-08-21 18:46:42,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:42,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80913669] [2021-08-21 18:46:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:42,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:43,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:43,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80913669] [2021-08-21 18:46:43,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80913669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:43,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465928288] [2021-08-21 18:46:43,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:46:43,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:43,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:43,221 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) [2021-08-21 18:46:43,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 18:46:43,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:46:43,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:43,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 18:46:43,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:44,162 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:46:44,163 INFO L388 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 29 treesize of output 43 [2021-08-21 18:46:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:44,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465928288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:44,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:44,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 18:46:44,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283475929] [2021-08-21 18:46:44,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:46:44,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:44,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:46:44,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:46:44,326 INFO L87 Difference]: Start difference. First operand 316 states and 682 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 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) [2021-08-21 18:46:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:46,007 INFO L93 Difference]: Finished difference Result 412 states and 822 transitions. [2021-08-21 18:46:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:46:46,008 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 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 26 [2021-08-21 18:46:46,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:46,009 INFO L225 Difference]: With dead ends: 412 [2021-08-21 18:46:46,009 INFO L226 Difference]: Without dead ends: 407 [2021-08-21 18:46:46,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1629.5ms TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:46:46,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-08-21 18:46:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 314. [2021-08-21 18:46:46,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.159744408945687) internal successors, (676), 313 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 676 transitions. [2021-08-21 18:46:46,016 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 676 transitions. Word has length 26 [2021-08-21 18:46:46,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:46,017 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 676 transitions. [2021-08-21 18:46:46,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 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) [2021-08-21 18:46:46,017 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 676 transitions. [2021-08-21 18:46:46,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:46:46,017 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:46,018 INFO L512 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] [2021-08-21 18:46:46,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 18:46:46,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 18:46:46,233 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1327892918, now seen corresponding path program 13 times [2021-08-21 18:46:46,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:46,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439302928] [2021-08-21 18:46:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:46,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:46,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:46,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439302928] [2021-08-21 18:46:46,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439302928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:46,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296539935] [2021-08-21 18:46:46,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:46:46,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:46,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:46,529 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) [2021-08-21 18:46:46,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 18:46:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:47,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:46:47,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:47,373 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:46:47,374 INFO L388 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 27 treesize of output 41 [2021-08-21 18:46:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:47,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296539935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:47,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:47,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-21 18:46:47,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272315846] [2021-08-21 18:46:47,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:46:47,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:47,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:46:47,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:46:47,522 INFO L87 Difference]: Start difference. First operand 314 states and 676 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-21 18:46:49,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:49,371 INFO L93 Difference]: Finished difference Result 640 states and 1274 transitions. [2021-08-21 18:46:49,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:46:49,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:46:49,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:49,373 INFO L225 Difference]: With dead ends: 640 [2021-08-21 18:46:49,373 INFO L226 Difference]: Without dead ends: 625 [2021-08-21 18:46:49,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1701.5ms TimeCoverageRelationStatistics Valid=553, Invalid=2203, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:46:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-08-21 18:46:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 323. [2021-08-21 18:46:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.1739130434782608) internal successors, (700), 322 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 700 transitions. [2021-08-21 18:46:49,381 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 700 transitions. Word has length 26 [2021-08-21 18:46:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:49,382 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 700 transitions. [2021-08-21 18:46:49,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-21 18:46:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 700 transitions. [2021-08-21 18:46:49,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:46:49,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:49,383 INFO L512 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] [2021-08-21 18:46:49,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 18:46:49,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:49,592 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:49,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:49,592 INFO L82 PathProgramCache]: Analyzing trace with hash 277733258, now seen corresponding path program 10 times [2021-08-21 18:46:49,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:49,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274985144] [2021-08-21 18:46:49,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:49,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:49,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:49,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274985144] [2021-08-21 18:46:49,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274985144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:49,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238459240] [2021-08-21 18:46:49,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:46:49,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:49,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:49,842 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) [2021-08-21 18:46:49,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 18:46:50,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:46:50,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:50,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:46:50,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:50,828 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:46:50,828 INFO L388 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 25 treesize of output 20 [2021-08-21 18:46:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:50,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238459240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:50,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:50,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 18:46:50,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764186357] [2021-08-21 18:46:50,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:46:50,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:50,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:46:50,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:46:50,877 INFO L87 Difference]: Start difference. First operand 323 states and 700 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2021-08-21 18:46:51,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:51,254 INFO L93 Difference]: Finished difference Result 445 states and 924 transitions. [2021-08-21 18:46:51,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:46:51,254 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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 26 [2021-08-21 18:46:51,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:51,256 INFO L225 Difference]: With dead ends: 445 [2021-08-21 18:46:51,256 INFO L226 Difference]: Without dead ends: 440 [2021-08-21 18:46:51,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 380.7ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:46:51,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-08-21 18:46:51,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 331. [2021-08-21 18:46:51,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.16969696969697) internal successors, (716), 330 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 716 transitions. [2021-08-21 18:46:51,262 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 716 transitions. Word has length 26 [2021-08-21 18:46:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:51,262 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 716 transitions. [2021-08-21 18:46:51,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 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) [2021-08-21 18:46:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 716 transitions. [2021-08-21 18:46:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:46:51,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:51,263 INFO L512 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] [2021-08-21 18:46:51,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:51,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:51,479 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:51,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:51,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1294651510, now seen corresponding path program 11 times [2021-08-21 18:46:51,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:51,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137221703] [2021-08-21 18:46:51,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:51,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:51,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:51,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137221703] [2021-08-21 18:46:51,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137221703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:51,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920143856] [2021-08-21 18:46:51,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:46:51,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:51,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:51,755 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) [2021-08-21 18:46:51,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 18:46:52,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:46:52,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:52,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:46:52,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:52,733 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:46:52,734 INFO L388 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 25 treesize of output 25 [2021-08-21 18:46:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:52,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920143856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:52,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:52,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 18:46:52,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453740275] [2021-08-21 18:46:52,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:46:52,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:52,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:46:52,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:46:52,835 INFO L87 Difference]: Start difference. First operand 331 states and 716 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:53,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:53,717 INFO L93 Difference]: Finished difference Result 501 states and 1024 transitions. [2021-08-21 18:46:53,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:46:53,718 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:46:53,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:53,720 INFO L225 Difference]: With dead ends: 501 [2021-08-21 18:46:53,720 INFO L226 Difference]: Without dead ends: 496 [2021-08-21 18:46:53,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 757.8ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:46:53,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-08-21 18:46:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 333. [2021-08-21 18:46:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.1716867469879517) internal successors, (721), 332 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:53,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 721 transitions. [2021-08-21 18:46:53,728 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 721 transitions. Word has length 26 [2021-08-21 18:46:53,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:53,728 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 721 transitions. [2021-08-21 18:46:53,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:53,728 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 721 transitions. [2021-08-21 18:46:53,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:46:53,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:53,729 INFO L512 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] [2021-08-21 18:46:53,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-21 18:46:53,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 18:46:53,949 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:53,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:53,949 INFO L82 PathProgramCache]: Analyzing trace with hash -791382962, now seen corresponding path program 12 times [2021-08-21 18:46:53,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:53,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579389524] [2021-08-21 18:46:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:53,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:54,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:54,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579389524] [2021-08-21 18:46:54,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579389524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:54,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995461402] [2021-08-21 18:46:54,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:46:54,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:54,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:54,261 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) [2021-08-21 18:46:54,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 18:46:54,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:46:54,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:54,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:46:54,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:55,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:46:55,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:46:55,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-21 18:46:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:55,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995461402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:55,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:55,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 18:46:55,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810841683] [2021-08-21 18:46:55,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:46:55,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:55,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:46:55,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:46:55,431 INFO L87 Difference]: Start difference. First operand 333 states and 721 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-08-21 18:46:55,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:55,983 INFO L93 Difference]: Finished difference Result 460 states and 959 transitions. [2021-08-21 18:46:55,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:46:55,983 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:46:55,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:55,985 INFO L225 Difference]: With dead ends: 460 [2021-08-21 18:46:55,985 INFO L226 Difference]: Without dead ends: 455 [2021-08-21 18:46:55,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 542.1ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:46:55,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-08-21 18:46:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 336. [2021-08-21 18:46:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.182089552238806) internal successors, (731), 335 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:55,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 731 transitions. [2021-08-21 18:46:55,991 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 731 transitions. Word has length 26 [2021-08-21 18:46:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:55,991 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 731 transitions. [2021-08-21 18:46:55,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-08-21 18:46:55,991 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 731 transitions. [2021-08-21 18:46:55,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:46:55,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:55,992 INFO L512 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] [2021-08-21 18:46:56,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:56,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 18:46:56,209 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:56,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:56,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1908751862, now seen corresponding path program 13 times [2021-08-21 18:46:56,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:56,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939939578] [2021-08-21 18:46:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:56,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:56,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:56,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939939578] [2021-08-21 18:46:56,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939939578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:56,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282037382] [2021-08-21 18:46:56,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:46:56,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:56,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:56,465 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) [2021-08-21 18:46:56,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 18:46:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:57,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:46:57,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:57,513 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:46:57,514 INFO L388 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 27 treesize of output 27 [2021-08-21 18:46:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:57,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282037382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:57,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:57,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 18:46:57,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286285054] [2021-08-21 18:46:57,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:46:57,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:57,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:46:57,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:46:57,617 INFO L87 Difference]: Start difference. First operand 336 states and 731 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-21 18:46:58,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:58,056 INFO L93 Difference]: Finished difference Result 514 states and 1058 transitions. [2021-08-21 18:46:58,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:46:58,056 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:46:58,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:58,057 INFO L225 Difference]: With dead ends: 514 [2021-08-21 18:46:58,058 INFO L226 Difference]: Without dead ends: 509 [2021-08-21 18:46:58,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 444.9ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:46:58,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-21 18:46:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 338. [2021-08-21 18:46:58,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.1810089020771515) internal successors, (735), 337 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:58,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 735 transitions. [2021-08-21 18:46:58,065 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 735 transitions. Word has length 26 [2021-08-21 18:46:58,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:58,065 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 735 transitions. [2021-08-21 18:46:58,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-21 18:46:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 735 transitions. [2021-08-21 18:46:58,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:46:58,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:58,066 INFO L512 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] [2021-08-21 18:46:58,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:58,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 18:46:58,277 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:58,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:58,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1275612790, now seen corresponding path program 14 times [2021-08-21 18:46:58,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:58,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744722855] [2021-08-21 18:46:58,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:58,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:58,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:58,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744722855] [2021-08-21 18:46:58,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744722855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:58,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121105722] [2021-08-21 18:46:58,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:46:58,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:58,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:58,535 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) [2021-08-21 18:46:58,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 18:46:59,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:46:59,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:59,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:46:59,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:59,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:46:59,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 37 [2021-08-21 18:46:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:59,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121105722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:59,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:59,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-08-21 18:46:59,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439536795] [2021-08-21 18:46:59,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:46:59,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:59,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:46:59,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:46:59,930 INFO L87 Difference]: Start difference. First operand 338 states and 735 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-08-21 18:47:00,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:00,858 INFO L93 Difference]: Finished difference Result 500 states and 1014 transitions. [2021-08-21 18:47:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:47:00,858 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:47:00,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:00,860 INFO L225 Difference]: With dead ends: 500 [2021-08-21 18:47:00,860 INFO L226 Difference]: Without dead ends: 490 [2021-08-21 18:47:00,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 826.6ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:47:00,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-08-21 18:47:00,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 341. [2021-08-21 18:47:00,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.1911764705882355) internal successors, (745), 340 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 745 transitions. [2021-08-21 18:47:00,866 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 745 transitions. Word has length 26 [2021-08-21 18:47:00,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:00,866 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 745 transitions. [2021-08-21 18:47:00,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-08-21 18:47:00,867 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 745 transitions. [2021-08-21 18:47:00,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:00,868 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:00,868 INFO L512 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] [2021-08-21 18:47:00,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 18:47:01,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:01,083 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:01,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:01,083 INFO L82 PathProgramCache]: Analyzing trace with hash 831957258, now seen corresponding path program 14 times [2021-08-21 18:47:01,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:01,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675654186] [2021-08-21 18:47:01,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:01,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:01,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:01,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675654186] [2021-08-21 18:47:01,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675654186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:01,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382492816] [2021-08-21 18:47:01,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:47:01,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:01,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:01,408 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) [2021-08-21 18:47:01,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 18:47:02,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:47:02,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:02,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:47:02,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:02,580 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:47:02,580 INFO L388 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 29 treesize of output 43 [2021-08-21 18:47:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:02,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382492816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:02,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:02,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 18:47:02,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070871928] [2021-08-21 18:47:02,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:47:02,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:02,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:47:02,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:47:02,691 INFO L87 Difference]: Start difference. First operand 341 states and 745 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 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) [2021-08-21 18:47:03,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:03,845 INFO L93 Difference]: Finished difference Result 431 states and 874 transitions. [2021-08-21 18:47:03,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:47:03,846 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 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 26 [2021-08-21 18:47:03,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:03,848 INFO L225 Difference]: With dead ends: 431 [2021-08-21 18:47:03,848 INFO L226 Difference]: Without dead ends: 421 [2021-08-21 18:47:03,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1137.3ms TimeCoverageRelationStatistics Valid=344, Invalid=1726, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:47:03,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-08-21 18:47:03,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2021-08-21 18:47:03,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.1911764705882355) internal successors, (745), 340 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:03,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 745 transitions. [2021-08-21 18:47:03,855 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 745 transitions. Word has length 26 [2021-08-21 18:47:03,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:03,855 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 745 transitions. [2021-08-21 18:47:03,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 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) [2021-08-21 18:47:03,855 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 745 transitions. [2021-08-21 18:47:03,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:03,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:03,856 INFO L512 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] [2021-08-21 18:47:03,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 18:47:04,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:04,069 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:04,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:04,069 INFO L82 PathProgramCache]: Analyzing trace with hash -659537654, now seen corresponding path program 15 times [2021-08-21 18:47:04,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:04,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545308165] [2021-08-21 18:47:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:04,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:04,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:04,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545308165] [2021-08-21 18:47:04,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545308165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:04,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509171885] [2021-08-21 18:47:04,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:47:04,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:04,311 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) [2021-08-21 18:47:04,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 18:47:05,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:47:05,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:05,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:47:05,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:05,658 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-08-21 18:47:05,659 INFO L388 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 27 treesize of output 51 [2021-08-21 18:47:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:06,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509171885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:06,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:06,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-21 18:47:06,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048378854] [2021-08-21 18:47:06,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:47:06,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:06,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:47:06,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:47:06,247 INFO L87 Difference]: Start difference. First operand 341 states and 745 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 18:47:07,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:07,429 INFO L93 Difference]: Finished difference Result 537 states and 1086 transitions. [2021-08-21 18:47:07,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:47:07,430 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 26 [2021-08-21 18:47:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:07,431 INFO L225 Difference]: With dead ends: 537 [2021-08-21 18:47:07,431 INFO L226 Difference]: Without dead ends: 527 [2021-08-21 18:47:07,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1208.5ms TimeCoverageRelationStatistics Valid=305, Invalid=1675, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:47:07,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-08-21 18:47:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 348. [2021-08-21 18:47:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.1930835734870318) internal successors, (761), 347 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:07,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 761 transitions. [2021-08-21 18:47:07,438 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 761 transitions. Word has length 26 [2021-08-21 18:47:07,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:07,438 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 761 transitions. [2021-08-21 18:47:07,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-08-21 18:47:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 761 transitions. [2021-08-21 18:47:07,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:07,439 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:07,439 INFO L512 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] [2021-08-21 18:47:07,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 18:47:07,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:07,664 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:07,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:07,665 INFO L82 PathProgramCache]: Analyzing trace with hash -83146358, now seen corresponding path program 15 times [2021-08-21 18:47:07,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:07,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407915970] [2021-08-21 18:47:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:07,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:07,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:07,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407915970] [2021-08-21 18:47:07,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407915970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:07,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304884162] [2021-08-21 18:47:07,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:47:07,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:07,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:07,880 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) [2021-08-21 18:47:07,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 18:47:08,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:47:08,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:08,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:47:08,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:09,105 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 18:47:09,105 INFO L388 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 35 treesize of output 43 [2021-08-21 18:47:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:09,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304884162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:09,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:09,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 18:47:09,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216891460] [2021-08-21 18:47:09,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:47:09,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:09,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:47:09,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:47:09,433 INFO L87 Difference]: Start difference. First operand 348 states and 761 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-21 18:47:10,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:10,370 INFO L93 Difference]: Finished difference Result 588 states and 1197 transitions. [2021-08-21 18:47:10,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:47:10,370 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:47:10,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:10,372 INFO L225 Difference]: With dead ends: 588 [2021-08-21 18:47:10,372 INFO L226 Difference]: Without dead ends: 583 [2021-08-21 18:47:10,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 794.2ms TimeCoverageRelationStatistics Valid=309, Invalid=1097, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:47:10,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-08-21 18:47:10,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 350. [2021-08-21 18:47:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.1977077363896846) internal successors, (767), 349 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 767 transitions. [2021-08-21 18:47:10,380 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 767 transitions. Word has length 26 [2021-08-21 18:47:10,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:10,380 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 767 transitions. [2021-08-21 18:47:10,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-21 18:47:10,380 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 767 transitions. [2021-08-21 18:47:10,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:10,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:10,381 INFO L512 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] [2021-08-21 18:47:10,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 18:47:10,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 18:47:10,597 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:10,597 INFO L82 PathProgramCache]: Analyzing trace with hash -740427510, now seen corresponding path program 16 times [2021-08-21 18:47:10,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:10,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57491812] [2021-08-21 18:47:10,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:10,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:10,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:10,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57491812] [2021-08-21 18:47:10,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57491812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:10,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853971391] [2021-08-21 18:47:10,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:47:10,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:10,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:10,879 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) [2021-08-21 18:47:10,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 18:47:11,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:47:11,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:11,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 18:47:11,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:12,087 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:47:12,088 INFO L388 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 27 treesize of output 41 [2021-08-21 18:47:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:12,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853971391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:12,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:12,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-21 18:47:12,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541718090] [2021-08-21 18:47:12,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:47:12,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:12,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:47:12,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:47:12,228 INFO L87 Difference]: Start difference. First operand 350 states and 767 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-21 18:47:13,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:13,755 INFO L93 Difference]: Finished difference Result 649 states and 1328 transitions. [2021-08-21 18:47:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:47:13,756 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:47:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:13,758 INFO L225 Difference]: With dead ends: 649 [2021-08-21 18:47:13,758 INFO L226 Difference]: Without dead ends: 633 [2021-08-21 18:47:13,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1451.1ms TimeCoverageRelationStatistics Valid=477, Invalid=1875, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 18:47:13,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-08-21 18:47:13,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 380. [2021-08-21 18:47:13,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.2242744063324538) internal successors, (843), 379 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:13,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 843 transitions. [2021-08-21 18:47:13,766 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 843 transitions. Word has length 26 [2021-08-21 18:47:13,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:13,766 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 843 transitions. [2021-08-21 18:47:13,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-21 18:47:13,767 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 843 transitions. [2021-08-21 18:47:13,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:13,768 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:13,768 INFO L512 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] [2021-08-21 18:47:13,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-21 18:47:13,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:13,976 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:13,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:13,976 INFO L82 PathProgramCache]: Analyzing trace with hash 2097566798, now seen corresponding path program 16 times [2021-08-21 18:47:13,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:13,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654239190] [2021-08-21 18:47:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:13,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:14,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:14,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654239190] [2021-08-21 18:47:14,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654239190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:14,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646168918] [2021-08-21 18:47:14,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:47:14,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:14,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:14,202 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) [2021-08-21 18:47:14,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 18:47:15,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:47:15,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:15,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:47:15,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:15,450 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:47:15,450 INFO L388 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 27 treesize of output 27 [2021-08-21 18:47:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:15,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646168918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:15,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:15,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 18:47:15,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185444613] [2021-08-21 18:47:15,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:47:15,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:15,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:47:15,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:47:15,548 INFO L87 Difference]: Start difference. First operand 380 states and 843 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-21 18:47:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:16,080 INFO L93 Difference]: Finished difference Result 580 states and 1204 transitions. [2021-08-21 18:47:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:47:16,081 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:47:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:16,082 INFO L225 Difference]: With dead ends: 580 [2021-08-21 18:47:16,082 INFO L226 Difference]: Without dead ends: 575 [2021-08-21 18:47:16,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 506.5ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:47:16,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-08-21 18:47:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 376. [2021-08-21 18:47:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.2213333333333334) internal successors, (833), 375 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 833 transitions. [2021-08-21 18:47:16,090 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 833 transitions. Word has length 26 [2021-08-21 18:47:16,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:16,090 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 833 transitions. [2021-08-21 18:47:16,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-08-21 18:47:16,090 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 833 transitions. [2021-08-21 18:47:16,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:16,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:16,091 INFO L512 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] [2021-08-21 18:47:16,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 18:47:16,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:16,304 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:16,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:16,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1098279730, now seen corresponding path program 17 times [2021-08-21 18:47:16,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:16,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525542827] [2021-08-21 18:47:16,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:16,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:16,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:16,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525542827] [2021-08-21 18:47:16,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525542827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:16,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059879639] [2021-08-21 18:47:16,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:47:16,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:16,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:16,594 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) [2021-08-21 18:47:16,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 18:47:17,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:47:17,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:17,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:47:17,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:17,841 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:47:17,842 INFO L388 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 27 treesize of output 41 [2021-08-21 18:47:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:17,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059879639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:17,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:17,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-21 18:47:17,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390957226] [2021-08-21 18:47:17,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:47:17,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:17,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:47:17,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:47:17,965 INFO L87 Difference]: Start difference. First operand 376 states and 833 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-21 18:47:19,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:19,583 INFO L93 Difference]: Finished difference Result 525 states and 1127 transitions. [2021-08-21 18:47:19,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:47:19,584 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:47:19,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:19,585 INFO L225 Difference]: With dead ends: 525 [2021-08-21 18:47:19,585 INFO L226 Difference]: Without dead ends: 515 [2021-08-21 18:47:19,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1518.7ms TimeCoverageRelationStatistics Valid=492, Invalid=2058, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:47:19,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-08-21 18:47:19,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 384. [2021-08-21 18:47:19,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.227154046997389) internal successors, (853), 383 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:19,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 853 transitions. [2021-08-21 18:47:19,593 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 853 transitions. Word has length 26 [2021-08-21 18:47:19,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:19,593 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 853 transitions. [2021-08-21 18:47:19,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2021-08-21 18:47:19,593 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 853 transitions. [2021-08-21 18:47:19,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:19,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:19,594 INFO L512 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] [2021-08-21 18:47:19,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 18:47:19,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 18:47:19,813 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:19,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:19,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1552875658, now seen corresponding path program 17 times [2021-08-21 18:47:19,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:19,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254426922] [2021-08-21 18:47:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:19,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:20,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:20,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254426922] [2021-08-21 18:47:20,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254426922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:20,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712429572] [2021-08-21 18:47:20,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:47:20,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:20,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:20,009 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) [2021-08-21 18:47:20,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 18:47:21,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:47:21,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:21,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:47:21,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:21,421 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:47:21,422 INFO L388 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 25 treesize of output 20 [2021-08-21 18:47:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:21,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712429572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:21,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:21,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 18:47:21,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460685431] [2021-08-21 18:47:21,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:47:21,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:21,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:47:21,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:47:21,465 INFO L87 Difference]: Start difference. First operand 384 states and 853 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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) [2021-08-21 18:47:21,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:21,944 INFO L93 Difference]: Finished difference Result 538 states and 1143 transitions. [2021-08-21 18:47:21,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:47:21,945 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 26 [2021-08-21 18:47:21,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:21,946 INFO L225 Difference]: With dead ends: 538 [2021-08-21 18:47:21,946 INFO L226 Difference]: Without dead ends: 533 [2021-08-21 18:47:21,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 490.6ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:47:21,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-08-21 18:47:21,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 398. [2021-08-21 18:47:21,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.2367758186397984) internal successors, (888), 397 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 888 transitions. [2021-08-21 18:47:21,953 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 888 transitions. Word has length 26 [2021-08-21 18:47:21,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:21,953 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 888 transitions. [2021-08-21 18:47:21,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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) [2021-08-21 18:47:21,953 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 888 transitions. [2021-08-21 18:47:21,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:21,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:21,954 INFO L512 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] [2021-08-21 18:47:21,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 18:47:22,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 18:47:22,175 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:22,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:22,176 INFO L82 PathProgramCache]: Analyzing trace with hash -19509110, now seen corresponding path program 18 times [2021-08-21 18:47:22,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:22,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626380945] [2021-08-21 18:47:22,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:22,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:22,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:22,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626380945] [2021-08-21 18:47:22,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626380945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:22,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597928711] [2021-08-21 18:47:22,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:47:22,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:22,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:22,392 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) [2021-08-21 18:47:22,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 18:47:23,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:47:23,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:23,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:47:23,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:23,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:47:23,831 INFO L354 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2021-08-21 18:47:23,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-08-21 18:47:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:23,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597928711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:23,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:23,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:47:23,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064200992] [2021-08-21 18:47:23,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:47:23,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:23,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:47:23,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:47:23,932 INFO L87 Difference]: Start difference. First operand 398 states and 888 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-08-21 18:47:24,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:24,326 INFO L93 Difference]: Finished difference Result 617 states and 1292 transitions. [2021-08-21 18:47:24,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:47:24,326 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-08-21 18:47:24,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:24,328 INFO L225 Difference]: With dead ends: 617 [2021-08-21 18:47:24,328 INFO L226 Difference]: Without dead ends: 612 [2021-08-21 18:47:24,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 416.2ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:47:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-08-21 18:47:24,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 398. [2021-08-21 18:47:24,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.2367758186397984) internal successors, (888), 397 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 888 transitions. [2021-08-21 18:47:24,337 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 888 transitions. Word has length 26 [2021-08-21 18:47:24,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:24,337 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 888 transitions. [2021-08-21 18:47:24,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-08-21 18:47:24,337 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 888 transitions. [2021-08-21 18:47:24,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:24,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:24,338 INFO L512 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] [2021-08-21 18:47:24,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-21 18:47:24,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 18:47:24,553 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:24,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:24,553 INFO L82 PathProgramCache]: Analyzing trace with hash -193199286, now seen corresponding path program 19 times [2021-08-21 18:47:24,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:24,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991054887] [2021-08-21 18:47:24,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:24,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:24,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:24,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991054887] [2021-08-21 18:47:24,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991054887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:24,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544586174] [2021-08-21 18:47:24,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:47:24,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:24,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:24,729 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) [2021-08-21 18:47:24,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 18:47:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:25,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:47:25,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:26,125 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:47:26,125 INFO L388 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 27 treesize of output 27 [2021-08-21 18:47:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:26,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544586174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:26,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:26,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:47:26,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869763596] [2021-08-21 18:47:26,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:47:26,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:26,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:47:26,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:47:26,229 INFO L87 Difference]: Start difference. First operand 398 states and 888 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-08-21 18:47:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:26,526 INFO L93 Difference]: Finished difference Result 552 states and 1179 transitions. [2021-08-21 18:47:26,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:47:26,526 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-08-21 18:47:26,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:26,528 INFO L225 Difference]: With dead ends: 552 [2021-08-21 18:47:26,528 INFO L226 Difference]: Without dead ends: 547 [2021-08-21 18:47:26,528 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 326.7ms TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:47:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-08-21 18:47:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 398. [2021-08-21 18:47:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.2367758186397984) internal successors, (888), 397 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 888 transitions. [2021-08-21 18:47:26,533 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 888 transitions. Word has length 26 [2021-08-21 18:47:26,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:26,534 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 888 transitions. [2021-08-21 18:47:26,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-08-21 18:47:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 888 transitions. [2021-08-21 18:47:26,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:26,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:26,534 INFO L512 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] [2021-08-21 18:47:26,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 18:47:26,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 18:47:26,735 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:26,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:26,735 INFO L82 PathProgramCache]: Analyzing trace with hash -785003702, now seen corresponding path program 20 times [2021-08-21 18:47:26,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:26,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454851127] [2021-08-21 18:47:26,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:26,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:26,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:26,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454851127] [2021-08-21 18:47:26,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454851127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:26,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591388998] [2021-08-21 18:47:26,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:47:26,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:26,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:26,900 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) [2021-08-21 18:47:26,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 18:47:28,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:47:28,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:28,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:47:28,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:28,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:47:28,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:47:28,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-21 18:47:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:28,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591388998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:28,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:28,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 18:47:28,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157304374] [2021-08-21 18:47:28,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:47:28,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:28,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:47:28,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:47:28,460 INFO L87 Difference]: Start difference. First operand 398 states and 888 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-08-21 18:47:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:28,879 INFO L93 Difference]: Finished difference Result 558 states and 1187 transitions. [2021-08-21 18:47:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:47:28,879 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:47:28,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:28,881 INFO L225 Difference]: With dead ends: 558 [2021-08-21 18:47:28,881 INFO L226 Difference]: Without dead ends: 553 [2021-08-21 18:47:28,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 425.4ms TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:47:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-08-21 18:47:28,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 402. [2021-08-21 18:47:28,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.2344139650872816) internal successors, (896), 401 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 896 transitions. [2021-08-21 18:47:28,886 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 896 transitions. Word has length 26 [2021-08-21 18:47:28,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:28,886 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 896 transitions. [2021-08-21 18:47:28,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-08-21 18:47:28,887 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 896 transitions. [2021-08-21 18:47:28,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:28,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:28,887 INFO L512 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] [2021-08-21 18:47:28,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 18:47:29,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 18:47:29,088 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:29,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:29,089 INFO L82 PathProgramCache]: Analyzing trace with hash -834692602, now seen corresponding path program 21 times [2021-08-21 18:47:29,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:29,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629706588] [2021-08-21 18:47:29,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:29,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:29,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:29,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629706588] [2021-08-21 18:47:29,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629706588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:29,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29378089] [2021-08-21 18:47:29,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:47:29,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:29,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:29,266 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) [2021-08-21 18:47:29,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 18:47:30,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:47:30,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:30,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:47:30,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:30,780 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 18:47:30,781 INFO L388 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 35 treesize of output 43 [2021-08-21 18:47:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:31,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29378089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:31,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:31,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:47:31,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054546085] [2021-08-21 18:47:31,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:47:31,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:31,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:47:31,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:47:31,113 INFO L87 Difference]: Start difference. First operand 402 states and 896 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-08-21 18:47:31,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:31,464 INFO L93 Difference]: Finished difference Result 546 states and 1168 transitions. [2021-08-21 18:47:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:47:31,465 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-08-21 18:47:31,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:31,466 INFO L225 Difference]: With dead ends: 546 [2021-08-21 18:47:31,466 INFO L226 Difference]: Without dead ends: 541 [2021-08-21 18:47:31,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 421.7ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:47:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-08-21 18:47:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 406. [2021-08-21 18:47:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.2271604938271605) internal successors, (902), 405 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:31,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 902 transitions. [2021-08-21 18:47:31,472 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 902 transitions. Word has length 26 [2021-08-21 18:47:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:31,472 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 902 transitions. [2021-08-21 18:47:31,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-08-21 18:47:31,472 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 902 transitions. [2021-08-21 18:47:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:31,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:31,473 INFO L512 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] [2021-08-21 18:47:31,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-21 18:47:31,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-21 18:47:31,684 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:31,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:31,684 INFO L82 PathProgramCache]: Analyzing trace with hash -337213050, now seen corresponding path program 22 times [2021-08-21 18:47:31,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:31,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515345333] [2021-08-21 18:47:31,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:31,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:31,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:31,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515345333] [2021-08-21 18:47:31,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515345333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:31,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333779668] [2021-08-21 18:47:31,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:47:31,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:31,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:31,915 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) [2021-08-21 18:47:31,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 18:47:33,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:47:33,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:33,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:47:33,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:33,443 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:47:33,443 INFO L388 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 25 treesize of output 20 [2021-08-21 18:47:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:33,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333779668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:33,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:33,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 18:47:33,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157953121] [2021-08-21 18:47:33,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:47:33,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:33,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:47:33,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:47:33,497 INFO L87 Difference]: Start difference. First operand 406 states and 902 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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) [2021-08-21 18:47:33,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:33,852 INFO L93 Difference]: Finished difference Result 548 states and 1159 transitions. [2021-08-21 18:47:33,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:47:33,852 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 26 [2021-08-21 18:47:33,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:33,854 INFO L225 Difference]: With dead ends: 548 [2021-08-21 18:47:33,854 INFO L226 Difference]: Without dead ends: 543 [2021-08-21 18:47:33,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 377.0ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:47:33,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-08-21 18:47:33,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 408. [2021-08-21 18:47:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.230958230958231) internal successors, (908), 407 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 908 transitions. [2021-08-21 18:47:33,859 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 908 transitions. Word has length 26 [2021-08-21 18:47:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:33,859 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 908 transitions. [2021-08-21 18:47:33,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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) [2021-08-21 18:47:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 908 transitions. [2021-08-21 18:47:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:33,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:33,860 INFO L512 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] [2021-08-21 18:47:33,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 18:47:34,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 18:47:34,061 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:34,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:34,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1770356998, now seen corresponding path program 18 times [2021-08-21 18:47:34,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:34,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194712337] [2021-08-21 18:47:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:34,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:34,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:34,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194712337] [2021-08-21 18:47:34,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194712337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:34,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110705143] [2021-08-21 18:47:34,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:47:34,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:34,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:34,239 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) [2021-08-21 18:47:34,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 18:47:35,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:47:35,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:35,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:47:35,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:35,790 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:47:35,791 INFO L388 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 29 treesize of output 43 [2021-08-21 18:47:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:35,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110705143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:35,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:35,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-21 18:47:35,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912841253] [2021-08-21 18:47:35,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:47:35,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:35,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:47:35,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:47:35,907 INFO L87 Difference]: Start difference. First operand 408 states and 908 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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) [2021-08-21 18:47:36,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:36,613 INFO L93 Difference]: Finished difference Result 535 states and 1102 transitions. [2021-08-21 18:47:36,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:47:36,613 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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 26 [2021-08-21 18:47:36,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:36,615 INFO L225 Difference]: With dead ends: 535 [2021-08-21 18:47:36,615 INFO L226 Difference]: Without dead ends: 525 [2021-08-21 18:47:36,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 595.8ms TimeCoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:47:36,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-08-21 18:47:36,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 417. [2021-08-21 18:47:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.235576923076923) internal successors, (930), 416 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 930 transitions. [2021-08-21 18:47:36,623 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 930 transitions. Word has length 26 [2021-08-21 18:47:36,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:36,623 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 930 transitions. [2021-08-21 18:47:36,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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) [2021-08-21 18:47:36,623 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 930 transitions. [2021-08-21 18:47:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:36,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:36,624 INFO L512 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] [2021-08-21 18:47:36,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 18:47:36,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-21 18:47:36,837 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:36,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:36,837 INFO L82 PathProgramCache]: Analyzing trace with hash 855253382, now seen corresponding path program 23 times [2021-08-21 18:47:36,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:36,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371564842] [2021-08-21 18:47:36,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:36,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:37,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:37,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371564842] [2021-08-21 18:47:37,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371564842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:37,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025464235] [2021-08-21 18:47:37,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:47:37,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:37,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:37,025 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) [2021-08-21 18:47:37,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 18:47:38,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:47:38,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:38,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:47:38,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:38,570 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:47:38,571 INFO L388 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 27 treesize of output 27 [2021-08-21 18:47:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:38,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025464235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:38,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:38,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:47:38,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964775460] [2021-08-21 18:47:38,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:47:38,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:38,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:47:38,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:47:38,678 INFO L87 Difference]: Start difference. First operand 417 states and 930 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-08-21 18:47:39,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:39,466 INFO L93 Difference]: Finished difference Result 658 states and 1373 transitions. [2021-08-21 18:47:39,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:47:39,466 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 26 [2021-08-21 18:47:39,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:39,468 INFO L225 Difference]: With dead ends: 658 [2021-08-21 18:47:39,468 INFO L226 Difference]: Without dead ends: 653 [2021-08-21 18:47:39,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 579.9ms TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:47:39,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-08-21 18:47:39,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 417. [2021-08-21 18:47:39,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.235576923076923) internal successors, (930), 416 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:39,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 930 transitions. [2021-08-21 18:47:39,475 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 930 transitions. Word has length 26 [2021-08-21 18:47:39,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:39,475 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 930 transitions. [2021-08-21 18:47:39,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-08-21 18:47:39,476 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 930 transitions. [2021-08-21 18:47:39,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:39,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:39,476 INFO L512 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] [2021-08-21 18:47:39,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-21 18:47:39,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:39,680 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:39,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:39,680 INFO L82 PathProgramCache]: Analyzing trace with hash 197972230, now seen corresponding path program 19 times [2021-08-21 18:47:39,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:39,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134056002] [2021-08-21 18:47:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:39,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:39,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:39,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134056002] [2021-08-21 18:47:39,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134056002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:39,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834575785] [2021-08-21 18:47:39,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:47:39,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:39,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:39,854 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) [2021-08-21 18:47:39,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 18:47:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:41,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:47:41,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:41,369 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:47:41,369 INFO L388 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 27 treesize of output 41 [2021-08-21 18:47:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:41,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834575785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:41,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:41,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 18:47:41,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100810129] [2021-08-21 18:47:41,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:47:41,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:41,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:47:41,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:47:41,514 INFO L87 Difference]: Start difference. First operand 417 states and 930 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:42,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:42,315 INFO L93 Difference]: Finished difference Result 725 states and 1475 transitions. [2021-08-21 18:47:42,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:47:42,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:47:42,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:42,318 INFO L225 Difference]: With dead ends: 725 [2021-08-21 18:47:42,318 INFO L226 Difference]: Without dead ends: 711 [2021-08-21 18:47:42,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 693.2ms TimeCoverageRelationStatistics Valid=323, Invalid=1237, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:47:42,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-08-21 18:47:42,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 426. [2021-08-21 18:47:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.2376470588235295) internal successors, (951), 425 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 951 transitions. [2021-08-21 18:47:42,325 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 951 transitions. Word has length 26 [2021-08-21 18:47:42,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:42,325 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 951 transitions. [2021-08-21 18:47:42,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 951 transitions. [2021-08-21 18:47:42,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:42,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:42,326 INFO L512 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] [2021-08-21 18:47:42,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 18:47:42,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:42,526 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:42,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:42,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1259000758, now seen corresponding path program 24 times [2021-08-21 18:47:42,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:42,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718371819] [2021-08-21 18:47:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:42,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:42,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:42,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718371819] [2021-08-21 18:47:42,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718371819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:42,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866733825] [2021-08-21 18:47:42,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:47:42,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:42,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:42,704 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) [2021-08-21 18:47:42,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 18:47:44,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:47:44,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:44,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:47:44,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:44,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:47:44,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:47:44,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-21 18:47:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:44,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866733825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:44,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:44,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 18:47:44,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558193570] [2021-08-21 18:47:44,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:47:44,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:44,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:47:44,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:47:44,407 INFO L87 Difference]: Start difference. First operand 426 states and 951 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-08-21 18:47:45,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:45,161 INFO L93 Difference]: Finished difference Result 600 states and 1276 transitions. [2021-08-21 18:47:45,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:47:45,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:47:45,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:45,164 INFO L225 Difference]: With dead ends: 600 [2021-08-21 18:47:45,164 INFO L226 Difference]: Without dead ends: 595 [2021-08-21 18:47:45,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 645.8ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:47:45,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-08-21 18:47:45,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 423. [2021-08-21 18:47:45,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.2298578199052135) internal successors, (941), 422 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 941 transitions. [2021-08-21 18:47:45,170 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 941 transitions. Word has length 26 [2021-08-21 18:47:45,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:45,170 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 941 transitions. [2021-08-21 18:47:45,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-08-21 18:47:45,170 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 941 transitions. [2021-08-21 18:47:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:45,171 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:45,171 INFO L512 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] [2021-08-21 18:47:45,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-21 18:47:45,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 18:47:45,372 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:45,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:45,372 INFO L82 PathProgramCache]: Analyzing trace with hash -159879990, now seen corresponding path program 20 times [2021-08-21 18:47:45,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:45,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853356337] [2021-08-21 18:47:45,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:45,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:45,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:45,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853356337] [2021-08-21 18:47:45,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853356337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:45,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163156525] [2021-08-21 18:47:45,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:47:45,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:45,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:45,551 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) [2021-08-21 18:47:45,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 18:47:46,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:47:46,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:46,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 18:47:46,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:47,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:47:47,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:47:47,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:47:47,244 INFO L388 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 37 [2021-08-21 18:47:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:47,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163156525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:47,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:47,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 18:47:47,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077499097] [2021-08-21 18:47:47,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:47:47,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:47,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:47:47,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:47:47,376 INFO L87 Difference]: Start difference. First operand 423 states and 941 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-08-21 18:47:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:48,586 INFO L93 Difference]: Finished difference Result 649 states and 1358 transitions. [2021-08-21 18:47:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:47:48,586 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 26 [2021-08-21 18:47:48,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:48,589 INFO L225 Difference]: With dead ends: 649 [2021-08-21 18:47:48,589 INFO L226 Difference]: Without dead ends: 639 [2021-08-21 18:47:48,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1079.1ms TimeCoverageRelationStatistics Valid=415, Invalid=1565, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:47:48,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-08-21 18:47:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 427. [2021-08-21 18:47:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.232394366197183) internal successors, (951), 426 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 951 transitions. [2021-08-21 18:47:48,597 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 951 transitions. Word has length 26 [2021-08-21 18:47:48,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:48,597 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 951 transitions. [2021-08-21 18:47:48,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-08-21 18:47:48,597 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 951 transitions. [2021-08-21 18:47:48,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:48,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:48,598 INFO L512 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] [2021-08-21 18:47:48,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-21 18:47:48,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 18:47:48,798 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:48,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:48,798 INFO L82 PathProgramCache]: Analyzing trace with hash 946842442, now seen corresponding path program 25 times [2021-08-21 18:47:48,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:48,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671295035] [2021-08-21 18:47:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:48,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:48,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:48,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671295035] [2021-08-21 18:47:48,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671295035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:48,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359229602] [2021-08-21 18:47:48,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:47:48,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:48,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:48,976 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) [2021-08-21 18:47:48,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 18:47:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:50,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:47:50,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:50,725 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:47:50,725 INFO L388 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 27 treesize of output 27 [2021-08-21 18:47:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:50,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359229602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:50,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:50,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:47:50,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858104954] [2021-08-21 18:47:50,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:47:50,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:50,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:47:50,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:47:50,822 INFO L87 Difference]: Start difference. First operand 427 states and 951 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-08-21 18:47:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:51,257 INFO L93 Difference]: Finished difference Result 586 states and 1251 transitions. [2021-08-21 18:47:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:47:51,258 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-08-21 18:47:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:51,259 INFO L225 Difference]: With dead ends: 586 [2021-08-21 18:47:51,259 INFO L226 Difference]: Without dead ends: 581 [2021-08-21 18:47:51,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 389.4ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:47:51,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-08-21 18:47:51,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 431. [2021-08-21 18:47:51,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.23953488372093) internal successors, (963), 430 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:51,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 963 transitions. [2021-08-21 18:47:51,268 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 963 transitions. Word has length 26 [2021-08-21 18:47:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:51,268 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 963 transitions. [2021-08-21 18:47:51,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-08-21 18:47:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 963 transitions. [2021-08-21 18:47:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:47:51,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:51,269 INFO L512 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] [2021-08-21 18:47:51,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 18:47:51,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 18:47:51,469 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:51,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:51,469 INFO L82 PathProgramCache]: Analyzing trace with hash 639945674, now seen corresponding path program 21 times [2021-08-21 18:47:51,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:51,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140188844] [2021-08-21 18:47:51,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:51,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:51,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:51,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140188844] [2021-08-21 18:47:51,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140188844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:51,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085454094] [2021-08-21 18:47:51,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:47:51,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:51,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:51,662 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) [2021-08-21 18:47:51,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 18:47:53,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:47:53,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:53,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 18:47:53,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:53,338 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:47:53,339 INFO L388 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 27 treesize of output 41 [2021-08-21 18:47:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:53,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085454094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:53,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:53,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 18:47:53,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191657769] [2021-08-21 18:47:53,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:47:53,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:53,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:47:53,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:47:53,554 INFO L87 Difference]: Start difference. First operand 431 states and 963 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:54,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:54,091 INFO L93 Difference]: Finished difference Result 600 states and 1271 transitions. [2021-08-21 18:47:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:47:54,091 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:47:54,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:54,093 INFO L225 Difference]: With dead ends: 600 [2021-08-21 18:47:54,093 INFO L226 Difference]: Without dead ends: 590 [2021-08-21 18:47:54,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 486.9ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:47:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-08-21 18:47:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 426. [2021-08-21 18:47:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.232941176470588) internal successors, (949), 425 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:54,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 949 transitions. [2021-08-21 18:47:54,100 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 949 transitions. Word has length 26 [2021-08-21 18:47:54,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:54,100 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 949 transitions. [2021-08-21 18:47:54,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:54,100 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 949 transitions. [2021-08-21 18:47:54,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:47:54,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:54,101 INFO L512 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] [2021-08-21 18:47:54,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 18:47:54,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:54,301 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:54,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:54,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1982319532, now seen corresponding path program 26 times [2021-08-21 18:47:54,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:54,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989590590] [2021-08-21 18:47:54,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:54,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:54,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:54,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989590590] [2021-08-21 18:47:54,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989590590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:54,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118106153] [2021-08-21 18:47:54,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:47:54,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:54,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:54,372 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) [2021-08-21 18:47:54,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 18:47:55,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:47:55,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:55,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:47:55,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:56,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118106153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:56,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:56,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 18:47:56,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146857126] [2021-08-21 18:47:56,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:47:56,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:56,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:47:56,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:47:56,038 INFO L87 Difference]: Start difference. First operand 426 states and 949 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:56,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:56,654 INFO L93 Difference]: Finished difference Result 965 states and 1937 transitions. [2021-08-21 18:47:56,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:47:56,654 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:47:56,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:56,656 INFO L225 Difference]: With dead ends: 965 [2021-08-21 18:47:56,656 INFO L226 Difference]: Without dead ends: 965 [2021-08-21 18:47:56,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 439.8ms TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:47:56,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-08-21 18:47:56,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 486. [2021-08-21 18:47:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.270103092783505) internal successors, (1101), 485 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:56,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1101 transitions. [2021-08-21 18:47:56,667 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1101 transitions. Word has length 28 [2021-08-21 18:47:56,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:56,667 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1101 transitions. [2021-08-21 18:47:56,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:56,667 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1101 transitions. [2021-08-21 18:47:56,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:47:56,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:56,668 INFO L512 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] [2021-08-21 18:47:56,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 18:47:56,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 18:47:56,875 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:56,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:56,876 INFO L82 PathProgramCache]: Analyzing trace with hash 490824620, now seen corresponding path program 27 times [2021-08-21 18:47:56,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:56,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345544891] [2021-08-21 18:47:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:56,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:56,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:56,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345544891] [2021-08-21 18:47:56,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345544891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:56,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379016297] [2021-08-21 18:47:56,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:47:56,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:56,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:56,945 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) [2021-08-21 18:47:56,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 18:47:58,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:47:58,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:58,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:47:58,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:58,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379016297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:58,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:58,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 18:47:58,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514901003] [2021-08-21 18:47:58,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:47:58,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:58,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:47:58,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:47:58,645 INFO L87 Difference]: Start difference. First operand 486 states and 1101 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:59,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:59,454 INFO L93 Difference]: Finished difference Result 1115 states and 2178 transitions. [2021-08-21 18:47:59,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 18:47:59,454 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:47:59,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:59,456 INFO L225 Difference]: With dead ends: 1115 [2021-08-21 18:47:59,456 INFO L226 Difference]: Without dead ends: 1115 [2021-08-21 18:47:59,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 616.8ms TimeCoverageRelationStatistics Valid=826, Invalid=3206, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 18:47:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-08-21 18:47:59,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 488. [2021-08-21 18:47:59,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.2566735112936347) internal successors, (1099), 487 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1099 transitions. [2021-08-21 18:47:59,465 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1099 transitions. Word has length 28 [2021-08-21 18:47:59,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:59,465 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1099 transitions. [2021-08-21 18:47:59,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:59,465 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1099 transitions. [2021-08-21 18:47:59,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:47:59,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:59,466 INFO L512 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] [2021-08-21 18:47:59,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 18:47:59,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:59,666 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:59,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:59,667 INFO L82 PathProgramCache]: Analyzing trace with hash 132571948, now seen corresponding path program 22 times [2021-08-21 18:47:59,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:59,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678565510] [2021-08-21 18:47:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:59,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:59,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:59,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678565510] [2021-08-21 18:47:59,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678565510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:59,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377067087] [2021-08-21 18:47:59,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:47:59,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:59,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:59,737 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) [2021-08-21 18:47:59,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 18:48:01,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:48:01,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:01,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:48:01,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:01,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377067087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:01,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:01,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 18:48:01,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857690571] [2021-08-21 18:48:01,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:48:01,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:01,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:48:01,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:48:01,386 INFO L87 Difference]: Start difference. First operand 488 states and 1099 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:01,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:01,786 INFO L93 Difference]: Finished difference Result 846 states and 1722 transitions. [2021-08-21 18:48:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:48:01,786 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:48:01,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:01,788 INFO L225 Difference]: With dead ends: 846 [2021-08-21 18:48:01,788 INFO L226 Difference]: Without dead ends: 846 [2021-08-21 18:48:01,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 277.1ms TimeCoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:48:01,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-08-21 18:48:01,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 486. [2021-08-21 18:48:01,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.2536082474226804) internal successors, (1093), 485 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1093 transitions. [2021-08-21 18:48:01,795 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1093 transitions. Word has length 28 [2021-08-21 18:48:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:01,795 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1093 transitions. [2021-08-21 18:48:01,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1093 transitions. [2021-08-21 18:48:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:01,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:01,796 INFO L512 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] [2021-08-21 18:48:01,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 18:48:01,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 18:48:01,997 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:01,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:01,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1872794840, now seen corresponding path program 28 times [2021-08-21 18:48:01,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:01,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614072664] [2021-08-21 18:48:01,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:01,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:48:02,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:02,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614072664] [2021-08-21 18:48:02,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614072664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:02,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934443169] [2021-08-21 18:48:02,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:48:02,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:02,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:02,049 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) [2021-08-21 18:48:02,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 18:48:03,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:48:03,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:03,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:48:03,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:48:03,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934443169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:03,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:03,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 18:48:03,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126182392] [2021-08-21 18:48:03,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:48:03,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:03,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:48:03,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:48:03,667 INFO L87 Difference]: Start difference. First operand 486 states and 1093 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:03,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:03,765 INFO L93 Difference]: Finished difference Result 799 states and 1693 transitions. [2021-08-21 18:48:03,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:48:03,765 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:48:03,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:03,766 INFO L225 Difference]: With dead ends: 799 [2021-08-21 18:48:03,766 INFO L226 Difference]: Without dead ends: 799 [2021-08-21 18:48:03,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:48:03,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-08-21 18:48:03,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 678. [2021-08-21 18:48:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 2.2511078286558344) internal successors, (1524), 677 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1524 transitions. [2021-08-21 18:48:03,775 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1524 transitions. Word has length 28 [2021-08-21 18:48:03,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:03,775 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 1524 transitions. [2021-08-21 18:48:03,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1524 transitions. [2021-08-21 18:48:03,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:03,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:03,776 INFO L512 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] [2021-08-21 18:48:03,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-21 18:48:03,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-21 18:48:03,977 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:03,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:03,977 INFO L82 PathProgramCache]: Analyzing trace with hash 572424872, now seen corresponding path program 29 times [2021-08-21 18:48:03,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:03,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702121043] [2021-08-21 18:48:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:03,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:04,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:04,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702121043] [2021-08-21 18:48:04,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702121043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:04,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892986064] [2021-08-21 18:48:04,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:48:04,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:04,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:04,038 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) [2021-08-21 18:48:04,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 18:48:05,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:48:05,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:05,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:48:05,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:05,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892986064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:05,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:05,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 18:48:05,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787229565] [2021-08-21 18:48:05,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:48:05,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:05,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:48:05,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:48:05,752 INFO L87 Difference]: Start difference. First operand 678 states and 1524 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:06,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:06,088 INFO L93 Difference]: Finished difference Result 989 states and 2011 transitions. [2021-08-21 18:48:06,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:48:06,088 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:48:06,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:06,090 INFO L225 Difference]: With dead ends: 989 [2021-08-21 18:48:06,090 INFO L226 Difference]: Without dead ends: 971 [2021-08-21 18:48:06,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:48:06,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-08-21 18:48:06,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 747. [2021-08-21 18:48:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 2.253351206434316) internal successors, (1681), 746 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:06,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1681 transitions. [2021-08-21 18:48:06,103 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1681 transitions. Word has length 28 [2021-08-21 18:48:06,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:06,103 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 1681 transitions. [2021-08-21 18:48:06,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:06,103 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1681 transitions. [2021-08-21 18:48:06,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:06,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:06,105 INFO L512 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] [2021-08-21 18:48:06,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 18:48:06,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:06,323 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:06,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:06,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1081457192, now seen corresponding path program 23 times [2021-08-21 18:48:06,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:06,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447209292] [2021-08-21 18:48:06,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:06,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:06,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:06,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447209292] [2021-08-21 18:48:06,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447209292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:06,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087280598] [2021-08-21 18:48:06,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:48:06,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:06,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:06,397 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) [2021-08-21 18:48:06,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 18:48:07,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:48:07,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:07,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:48:07,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:08,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087280598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:08,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:08,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 18:48:08,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328891692] [2021-08-21 18:48:08,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:48:08,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:08,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:48:08,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:48:08,192 INFO L87 Difference]: Start difference. First operand 747 states and 1681 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:08,495 INFO L93 Difference]: Finished difference Result 1481 states and 2980 transitions. [2021-08-21 18:48:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:48:08,496 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:48:08,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:08,498 INFO L225 Difference]: With dead ends: 1481 [2021-08-21 18:48:08,498 INFO L226 Difference]: Without dead ends: 1465 [2021-08-21 18:48:08,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 288.0ms TimeCoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:48:08,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-08-21 18:48:08,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 975. [2021-08-21 18:48:08,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.2751540041067764) internal successors, (2216), 974 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2216 transitions. [2021-08-21 18:48:08,515 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2216 transitions. Word has length 28 [2021-08-21 18:48:08,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:08,515 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 2216 transitions. [2021-08-21 18:48:08,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:08,515 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2216 transitions. [2021-08-21 18:48:08,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:08,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:08,517 INFO L512 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] [2021-08-21 18:48:08,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 18:48:08,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 18:48:08,722 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:08,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:08,723 INFO L82 PathProgramCache]: Analyzing trace with hash 2135177896, now seen corresponding path program 30 times [2021-08-21 18:48:08,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:08,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543441413] [2021-08-21 18:48:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:08,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:08,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:08,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543441413] [2021-08-21 18:48:08,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543441413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:08,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555282296] [2021-08-21 18:48:08,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:48:08,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:08,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:08,793 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) [2021-08-21 18:48:08,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 18:48:10,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:48:10,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:10,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:48:10,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:10,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555282296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:10,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:10,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 18:48:10,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627681042] [2021-08-21 18:48:10,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:48:10,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:10,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:48:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:48:10,485 INFO L87 Difference]: Start difference. First operand 975 states and 2216 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:10,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:10,892 INFO L93 Difference]: Finished difference Result 1387 states and 2786 transitions. [2021-08-21 18:48:10,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:48:10,893 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:48:10,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:10,895 INFO L225 Difference]: With dead ends: 1387 [2021-08-21 18:48:10,895 INFO L226 Difference]: Without dead ends: 1375 [2021-08-21 18:48:10,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 306.5ms TimeCoverageRelationStatistics Valid=334, Invalid=788, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:48:10,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-08-21 18:48:10,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 987. [2021-08-21 18:48:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 2.281947261663286) internal successors, (2250), 986 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:10,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 2250 transitions. [2021-08-21 18:48:10,910 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 2250 transitions. Word has length 28 [2021-08-21 18:48:10,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:10,910 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 2250 transitions. [2021-08-21 18:48:10,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 2250 transitions. [2021-08-21 18:48:10,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:10,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:10,912 INFO L512 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] [2021-08-21 18:48:10,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 18:48:11,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 18:48:11,113 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:11,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:11,113 INFO L82 PathProgramCache]: Analyzing trace with hash -629673304, now seen corresponding path program 31 times [2021-08-21 18:48:11,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:11,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003521273] [2021-08-21 18:48:11,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:11,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:11,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:11,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003521273] [2021-08-21 18:48:11,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003521273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:11,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779055360] [2021-08-21 18:48:11,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:48:11,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:11,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:11,172 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) [2021-08-21 18:48:11,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 18:48:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:12,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:48:12,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:12,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779055360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:12,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:12,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 18:48:12,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572106510] [2021-08-21 18:48:12,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:48:12,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:12,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:48:12,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:48:12,869 INFO L87 Difference]: Start difference. First operand 987 states and 2250 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:13,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:13,318 INFO L93 Difference]: Finished difference Result 1351 states and 2746 transitions. [2021-08-21 18:48:13,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:48:13,318 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:48:13,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:13,320 INFO L225 Difference]: With dead ends: 1351 [2021-08-21 18:48:13,320 INFO L226 Difference]: Without dead ends: 1337 [2021-08-21 18:48:13,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 328.6ms TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:48:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-08-21 18:48:13,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 975. [2021-08-21 18:48:13,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.293634496919918) internal successors, (2234), 974 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:13,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2234 transitions. [2021-08-21 18:48:13,334 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2234 transitions. Word has length 28 [2021-08-21 18:48:13,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:13,335 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 2234 transitions. [2021-08-21 18:48:13,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:13,335 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2234 transitions. [2021-08-21 18:48:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:13,336 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:13,336 INFO L512 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] [2021-08-21 18:48:13,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 18:48:13,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:13,537 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:13,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:13,537 INFO L82 PathProgramCache]: Analyzing trace with hash 94771880, now seen corresponding path program 32 times [2021-08-21 18:48:13,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:13,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669283292] [2021-08-21 18:48:13,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:13,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:13,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:13,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669283292] [2021-08-21 18:48:13,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669283292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:13,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196251057] [2021-08-21 18:48:13,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:48:13,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:13,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:13,602 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) [2021-08-21 18:48:13,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 18:48:15,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:48:15,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:15,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:48:15,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:15,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196251057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:15,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:15,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:48:15,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311146309] [2021-08-21 18:48:15,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:48:15,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:15,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:48:15,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:48:15,378 INFO L87 Difference]: Start difference. First operand 975 states and 2234 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:15,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:15,678 INFO L93 Difference]: Finished difference Result 1452 states and 2941 transitions. [2021-08-21 18:48:15,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:48:15,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:48:15,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:15,685 INFO L225 Difference]: With dead ends: 1452 [2021-08-21 18:48:15,685 INFO L226 Difference]: Without dead ends: 1440 [2021-08-21 18:48:15,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:48:15,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-08-21 18:48:15,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 983. [2021-08-21 18:48:15,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 2.3024439918533606) internal successors, (2261), 982 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 2261 transitions. [2021-08-21 18:48:15,703 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 2261 transitions. Word has length 28 [2021-08-21 18:48:15,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:15,703 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 2261 transitions. [2021-08-21 18:48:15,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:15,703 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 2261 transitions. [2021-08-21 18:48:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:15,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:15,705 INFO L512 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] [2021-08-21 18:48:15,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 18:48:15,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:15,921 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:15,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:15,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1148492584, now seen corresponding path program 33 times [2021-08-21 18:48:15,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:15,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713585128] [2021-08-21 18:48:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:15,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:48:15,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:15,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713585128] [2021-08-21 18:48:15,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713585128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:15,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228545570] [2021-08-21 18:48:15,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:48:15,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:15,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:15,969 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) [2021-08-21 18:48:15,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 18:48:17,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:48:17,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:17,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:48:17,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:48:17,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228545570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:17,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:17,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 18:48:17,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761710827] [2021-08-21 18:48:17,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:48:17,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:17,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:48:17,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:48:17,907 INFO L87 Difference]: Start difference. First operand 983 states and 2261 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) [2021-08-21 18:48:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:18,004 INFO L93 Difference]: Finished difference Result 1122 states and 2447 transitions. [2021-08-21 18:48:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:48:18,004 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 28 [2021-08-21 18:48:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:18,006 INFO L225 Difference]: With dead ends: 1122 [2021-08-21 18:48:18,006 INFO L226 Difference]: Without dead ends: 1122 [2021-08-21 18:48:18,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:48:18,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-08-21 18:48:18,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 910. [2021-08-21 18:48:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 2.3014301430143016) internal successors, (2092), 909 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 2092 transitions. [2021-08-21 18:48:18,018 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 2092 transitions. Word has length 28 [2021-08-21 18:48:18,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:18,018 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 2092 transitions. [2021-08-21 18:48:18,018 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) [2021-08-21 18:48:18,018 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 2092 transitions. [2021-08-21 18:48:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:18,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:18,019 INFO L512 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] [2021-08-21 18:48:18,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-21 18:48:18,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:18,220 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:18,220 INFO L82 PathProgramCache]: Analyzing trace with hash 603675560, now seen corresponding path program 34 times [2021-08-21 18:48:18,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:18,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836511987] [2021-08-21 18:48:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:18,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:18,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:18,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836511987] [2021-08-21 18:48:18,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836511987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:18,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970895525] [2021-08-21 18:48:18,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:48:18,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:18,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:18,278 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) [2021-08-21 18:48:18,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 18:48:19,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:48:19,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:19,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:48:19,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:20,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970895525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:20,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:20,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 18:48:20,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26004086] [2021-08-21 18:48:20,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:48:20,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:20,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:48:20,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:48:20,052 INFO L87 Difference]: Start difference. First operand 910 states and 2092 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:20,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:20,812 INFO L93 Difference]: Finished difference Result 2867 states and 5769 transitions. [2021-08-21 18:48:20,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 18:48:20,813 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:48:20,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:20,822 INFO L225 Difference]: With dead ends: 2867 [2021-08-21 18:48:20,822 INFO L226 Difference]: Without dead ends: 2867 [2021-08-21 18:48:20,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=827, Invalid=2955, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:48:20,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2021-08-21 18:48:20,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 851. [2021-08-21 18:48:20,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 2.2741176470588234) internal successors, (1933), 850 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:20,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1933 transitions. [2021-08-21 18:48:20,848 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1933 transitions. Word has length 28 [2021-08-21 18:48:20,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:20,848 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1933 transitions. [2021-08-21 18:48:20,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:20,848 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1933 transitions. [2021-08-21 18:48:20,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:20,850 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:20,850 INFO L512 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] [2021-08-21 18:48:20,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 18:48:21,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 18:48:21,065 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:21,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:21,065 INFO L82 PathProgramCache]: Analyzing trace with hash 861498024, now seen corresponding path program 35 times [2021-08-21 18:48:21,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:21,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318377943] [2021-08-21 18:48:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:21,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:21,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:21,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318377943] [2021-08-21 18:48:21,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318377943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:21,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105278399] [2021-08-21 18:48:21,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:48:21,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:21,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:21,115 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) [2021-08-21 18:48:21,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 18:48:22,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:48:22,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:22,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:48:22,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:22,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105278399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:22,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:22,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:48:22,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049164834] [2021-08-21 18:48:22,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:48:22,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:22,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:48:22,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:48:22,876 INFO L87 Difference]: Start difference. First operand 851 states and 1933 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:23,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:23,221 INFO L93 Difference]: Finished difference Result 1368 states and 2775 transitions. [2021-08-21 18:48:23,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:48:23,221 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:48:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:23,225 INFO L225 Difference]: With dead ends: 1368 [2021-08-21 18:48:23,225 INFO L226 Difference]: Without dead ends: 1364 [2021-08-21 18:48:23,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:48:23,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-08-21 18:48:23,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 919. [2021-08-21 18:48:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.3061002178649237) internal successors, (2117), 918 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:23,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2117 transitions. [2021-08-21 18:48:23,245 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2117 transitions. Word has length 28 [2021-08-21 18:48:23,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:23,245 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 2117 transitions. [2021-08-21 18:48:23,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:23,245 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2117 transitions. [2021-08-21 18:48:23,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:23,246 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:23,247 INFO L512 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] [2021-08-21 18:48:23,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 18:48:23,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-21 18:48:23,473 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:23,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:23,473 INFO L82 PathProgramCache]: Analyzing trace with hash -710886744, now seen corresponding path program 36 times [2021-08-21 18:48:23,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:23,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343586978] [2021-08-21 18:48:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:23,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:23,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:23,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343586978] [2021-08-21 18:48:23,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343586978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:23,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413737530] [2021-08-21 18:48:23,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:48:23,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:23,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:23,540 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) [2021-08-21 18:48:23,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 18:48:25,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:48:25,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:25,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:48:25,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:25,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413737530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:25,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:25,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:48:25,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927714514] [2021-08-21 18:48:25,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:48:25,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:25,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:48:25,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:48:25,387 INFO L87 Difference]: Start difference. First operand 919 states and 2117 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:25,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:25,810 INFO L93 Difference]: Finished difference Result 1392 states and 2830 transitions. [2021-08-21 18:48:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:48:25,810 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:48:25,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:25,812 INFO L225 Difference]: With dead ends: 1392 [2021-08-21 18:48:25,812 INFO L226 Difference]: Without dead ends: 1392 [2021-08-21 18:48:25,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 294.8ms TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:48:25,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-08-21 18:48:25,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 854. [2021-08-21 18:48:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.287221570926143) internal successors, (1951), 853 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:25,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1951 transitions. [2021-08-21 18:48:25,825 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1951 transitions. Word has length 28 [2021-08-21 18:48:25,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:25,826 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 1951 transitions. [2021-08-21 18:48:25,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:25,826 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1951 transitions. [2021-08-21 18:48:25,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:25,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:25,827 INFO L512 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] [2021-08-21 18:48:25,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-21 18:48:26,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-21 18:48:26,028 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:26,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:26,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2125030056, now seen corresponding path program 37 times [2021-08-21 18:48:26,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:26,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186455122] [2021-08-21 18:48:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:26,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:26,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:26,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186455122] [2021-08-21 18:48:26,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186455122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:26,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897924263] [2021-08-21 18:48:26,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:48:26,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:26,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:26,084 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) [2021-08-21 18:48:26,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 18:48:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:27,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:48:27,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:27,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897924263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:27,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:27,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 18:48:27,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840866149] [2021-08-21 18:48:27,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:48:27,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:27,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:48:27,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:48:27,891 INFO L87 Difference]: Start difference. First operand 854 states and 1951 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:28,352 INFO L93 Difference]: Finished difference Result 1412 states and 2930 transitions. [2021-08-21 18:48:28,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:48:28,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:48:28,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:28,358 INFO L225 Difference]: With dead ends: 1412 [2021-08-21 18:48:28,358 INFO L226 Difference]: Without dead ends: 1410 [2021-08-21 18:48:28,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 314.7ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:48:28,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-08-21 18:48:28,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 990. [2021-08-21 18:48:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 989 states have (on average 2.2932254802831142) internal successors, (2268), 989 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:28,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 2268 transitions. [2021-08-21 18:48:28,375 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 2268 transitions. Word has length 28 [2021-08-21 18:48:28,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:28,375 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 2268 transitions. [2021-08-21 18:48:28,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:28,376 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 2268 transitions. [2021-08-21 18:48:28,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:28,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:28,377 INFO L512 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] [2021-08-21 18:48:28,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 18:48:28,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:28,605 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:28,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:28,605 INFO L82 PathProgramCache]: Analyzing trace with hash -62367192, now seen corresponding path program 24 times [2021-08-21 18:48:28,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:28,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11980576] [2021-08-21 18:48:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:28,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:28,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:28,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11980576] [2021-08-21 18:48:28,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11980576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:28,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801028862] [2021-08-21 18:48:28,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:48:28,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:28,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:28,676 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) [2021-08-21 18:48:28,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 18:48:30,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:48:30,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:30,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:48:30,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:30,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801028862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:30,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:30,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 18:48:30,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201920461] [2021-08-21 18:48:30,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:48:30,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:30,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:48:30,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:48:30,642 INFO L87 Difference]: Start difference. First operand 990 states and 2268 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:30,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:30,967 INFO L93 Difference]: Finished difference Result 1911 states and 4062 transitions. [2021-08-21 18:48:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:48:30,967 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:48:30,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:30,970 INFO L225 Difference]: With dead ends: 1911 [2021-08-21 18:48:30,970 INFO L226 Difference]: Without dead ends: 1899 [2021-08-21 18:48:30,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 260.7ms TimeCoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:48:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-08-21 18:48:30,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1437. [2021-08-21 18:48:30,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 2.3356545961002784) internal successors, (3354), 1436 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:30,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 3354 transitions. [2021-08-21 18:48:30,993 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 3354 transitions. Word has length 28 [2021-08-21 18:48:30,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:30,993 INFO L470 AbstractCegarLoop]: Abstraction has 1437 states and 3354 transitions. [2021-08-21 18:48:30,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:30,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 3354 transitions. [2021-08-21 18:48:30,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:30,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:30,996 INFO L512 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] [2021-08-21 18:48:31,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 18:48:31,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:31,213 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:31,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:31,213 INFO L82 PathProgramCache]: Analyzing trace with hash -977470808, now seen corresponding path program 38 times [2021-08-21 18:48:31,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:31,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95718297] [2021-08-21 18:48:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:31,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:31,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:31,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95718297] [2021-08-21 18:48:31,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95718297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:31,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669005061] [2021-08-21 18:48:31,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:48:31,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:31,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:31,276 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) [2021-08-21 18:48:31,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 18:48:33,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:48:33,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:33,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:48:33,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:33,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669005061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:33,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:33,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 18:48:33,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432549994] [2021-08-21 18:48:33,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:48:33,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:33,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:48:33,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:48:33,190 INFO L87 Difference]: Start difference. First operand 1437 states and 3354 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:33,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:33,854 INFO L93 Difference]: Finished difference Result 2023 states and 4324 transitions. [2021-08-21 18:48:33,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:48:33,854 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:48:33,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:33,857 INFO L225 Difference]: With dead ends: 2023 [2021-08-21 18:48:33,857 INFO L226 Difference]: Without dead ends: 2023 [2021-08-21 18:48:33,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 447.8ms TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:48:33,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-08-21 18:48:33,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1447. [2021-08-21 18:48:33,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1447 states, 1446 states have (on average 2.3291839557399725) internal successors, (3368), 1446 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:33,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 3368 transitions. [2021-08-21 18:48:33,890 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 3368 transitions. Word has length 28 [2021-08-21 18:48:33,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:33,890 INFO L470 AbstractCegarLoop]: Abstraction has 1447 states and 3368 transitions. [2021-08-21 18:48:33,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:33,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 3368 transitions. [2021-08-21 18:48:33,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:33,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:33,893 INFO L512 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] [2021-08-21 18:48:33,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-21 18:48:34,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 18:48:34,113 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:34,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:34,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1051128680, now seen corresponding path program 39 times [2021-08-21 18:48:34,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:34,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945681222] [2021-08-21 18:48:34,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:34,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:34,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:34,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945681222] [2021-08-21 18:48:34,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945681222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:34,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92953915] [2021-08-21 18:48:34,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:48:34,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:34,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:34,174 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) [2021-08-21 18:48:34,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 18:48:35,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:48:35,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:35,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:48:35,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:36,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92953915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:36,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:36,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 18:48:36,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102383438] [2021-08-21 18:48:36,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:48:36,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:36,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:48:36,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:48:36,002 INFO L87 Difference]: Start difference. First operand 1447 states and 3368 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:36,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:36,200 INFO L93 Difference]: Finished difference Result 2285 states and 5071 transitions. [2021-08-21 18:48:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:48:36,200 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:48:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:36,203 INFO L225 Difference]: With dead ends: 2285 [2021-08-21 18:48:36,203 INFO L226 Difference]: Without dead ends: 2273 [2021-08-21 18:48:36,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:48:36,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-08-21 18:48:36,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1835. [2021-08-21 18:48:36,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1835 states, 1834 states have (on average 2.3380588876772084) internal successors, (4288), 1834 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:36,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 4288 transitions. [2021-08-21 18:48:36,226 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 4288 transitions. Word has length 28 [2021-08-21 18:48:36,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:36,226 INFO L470 AbstractCegarLoop]: Abstraction has 1835 states and 4288 transitions. [2021-08-21 18:48:36,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:36,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 4288 transitions. [2021-08-21 18:48:36,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:36,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:36,229 INFO L512 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] [2021-08-21 18:48:36,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 18:48:36,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-21 18:48:36,429 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:36,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1851096232, now seen corresponding path program 40 times [2021-08-21 18:48:36,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:36,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410325670] [2021-08-21 18:48:36,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:36,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:48:36,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:36,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410325670] [2021-08-21 18:48:36,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410325670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:36,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550274405] [2021-08-21 18:48:36,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:48:36,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:36,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:36,483 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) [2021-08-21 18:48:36,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 18:48:38,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:48:38,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:38,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:48:38,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:48:38,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550274405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:38,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:38,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-21 18:48:38,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919430666] [2021-08-21 18:48:38,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:48:38,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:38,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:48:38,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:48:38,289 INFO L87 Difference]: Start difference. First operand 1835 states and 4288 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:38,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:38,387 INFO L93 Difference]: Finished difference Result 1973 states and 4550 transitions. [2021-08-21 18:48:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:48:38,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:48:38,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:38,400 INFO L225 Difference]: With dead ends: 1973 [2021-08-21 18:48:38,401 INFO L226 Difference]: Without dead ends: 1973 [2021-08-21 18:48:38,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:48:38,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-08-21 18:48:38,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1938. [2021-08-21 18:48:38,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 2.3226639132679403) internal successors, (4499), 1937 states have internal predecessors, (4499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 4499 transitions. [2021-08-21 18:48:38,440 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 4499 transitions. Word has length 28 [2021-08-21 18:48:38,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:38,440 INFO L470 AbstractCegarLoop]: Abstraction has 1938 states and 4499 transitions. [2021-08-21 18:48:38,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 4499 transitions. [2021-08-21 18:48:38,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:38,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:38,443 INFO L512 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] [2021-08-21 18:48:38,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 18:48:38,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:38,643 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:38,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:38,644 INFO L82 PathProgramCache]: Analyzing trace with hash 127625004, now seen corresponding path program 41 times [2021-08-21 18:48:38,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:38,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262262207] [2021-08-21 18:48:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:38,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:38,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:38,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262262207] [2021-08-21 18:48:38,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262262207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:38,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344186491] [2021-08-21 18:48:38,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:48:38,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:38,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:38,690 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) [2021-08-21 18:48:38,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 18:48:40,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:48:40,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:40,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:48:40,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:40,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344186491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:40,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:40,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 18:48:40,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859821000] [2021-08-21 18:48:40,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:48:40,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:40,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:48:40,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:48:40,516 INFO L87 Difference]: Start difference. First operand 1938 states and 4499 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) [2021-08-21 18:48:40,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:40,717 INFO L93 Difference]: Finished difference Result 2373 states and 5348 transitions. [2021-08-21 18:48:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:48:40,717 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 28 [2021-08-21 18:48:40,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:40,720 INFO L225 Difference]: With dead ends: 2373 [2021-08-21 18:48:40,720 INFO L226 Difference]: Without dead ends: 2367 [2021-08-21 18:48:40,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:48:40,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2021-08-21 18:48:40,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 2223. [2021-08-21 18:48:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 2.332583258325833) internal successors, (5183), 2222 states have internal predecessors, (5183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:40,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 5183 transitions. [2021-08-21 18:48:40,743 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 5183 transitions. Word has length 28 [2021-08-21 18:48:40,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:40,743 INFO L470 AbstractCegarLoop]: Abstraction has 2223 states and 5183 transitions. [2021-08-21 18:48:40,744 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) [2021-08-21 18:48:40,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 5183 transitions. [2021-08-21 18:48:40,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:40,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:40,746 INFO L512 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] [2021-08-21 18:48:40,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 18:48:40,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 18:48:40,947 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:40,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:40,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1444759764, now seen corresponding path program 42 times [2021-08-21 18:48:40,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:40,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918533804] [2021-08-21 18:48:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:40,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:48:40,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:40,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918533804] [2021-08-21 18:48:40,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918533804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:40,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487120751] [2021-08-21 18:48:40,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:48:40,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:40,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:41,000 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) [2021-08-21 18:48:41,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 18:48:42,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:48:42,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:42,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:48:42,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:48:42,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487120751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:42,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:42,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 18:48:42,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415868210] [2021-08-21 18:48:42,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:48:42,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:42,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:48:42,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:48:42,885 INFO L87 Difference]: Start difference. First operand 2223 states and 5183 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) [2021-08-21 18:48:43,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:43,114 INFO L93 Difference]: Finished difference Result 2346 states and 5330 transitions. [2021-08-21 18:48:43,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:48:43,129 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 28 [2021-08-21 18:48:43,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:43,132 INFO L225 Difference]: With dead ends: 2346 [2021-08-21 18:48:43,132 INFO L226 Difference]: Without dead ends: 2346 [2021-08-21 18:48:43,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:48:43,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-08-21 18:48:43,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2181. [2021-08-21 18:48:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 2.3334862385321102) internal successors, (5087), 2180 states have internal predecessors, (5087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 5087 transitions. [2021-08-21 18:48:43,156 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 5087 transitions. Word has length 28 [2021-08-21 18:48:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:43,156 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 5087 transitions. [2021-08-21 18:48:43,157 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) [2021-08-21 18:48:43,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 5087 transitions. [2021-08-21 18:48:43,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:43,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:43,159 INFO L512 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] [2021-08-21 18:48:43,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-21 18:48:43,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 18:48:43,360 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:43,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:43,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1802611984, now seen corresponding path program 43 times [2021-08-21 18:48:43,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:43,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994884015] [2021-08-21 18:48:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:43,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:43,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:43,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994884015] [2021-08-21 18:48:43,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994884015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:43,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218766658] [2021-08-21 18:48:43,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:48:43,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:43,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:43,421 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) [2021-08-21 18:48:43,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 18:48:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:45,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:48:45,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:45,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218766658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:45,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:45,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 18:48:45,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664120541] [2021-08-21 18:48:45,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:48:45,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:45,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:48:45,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:48:45,261 INFO L87 Difference]: Start difference. First operand 2181 states and 5087 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:45,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:45,589 INFO L93 Difference]: Finished difference Result 2448 states and 5621 transitions. [2021-08-21 18:48:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:48:45,590 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:48:45,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:45,593 INFO L225 Difference]: With dead ends: 2448 [2021-08-21 18:48:45,593 INFO L226 Difference]: Without dead ends: 2448 [2021-08-21 18:48:45,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:48:45,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-08-21 18:48:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2247. [2021-08-21 18:48:45,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 2.320124666073019) internal successors, (5211), 2246 states have internal predecessors, (5211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 5211 transitions. [2021-08-21 18:48:45,618 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 5211 transitions. Word has length 28 [2021-08-21 18:48:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:45,618 INFO L470 AbstractCegarLoop]: Abstraction has 2247 states and 5211 transitions. [2021-08-21 18:48:45,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 5211 transitions. [2021-08-21 18:48:45,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:45,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:45,621 INFO L512 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] [2021-08-21 18:48:45,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-21 18:48:45,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 18:48:45,821 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:45,821 INFO L82 PathProgramCache]: Analyzing trace with hash 317593192, now seen corresponding path program 44 times [2021-08-21 18:48:45,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:45,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578543962] [2021-08-21 18:48:45,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:45,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:48:45,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:45,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578543962] [2021-08-21 18:48:45,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578543962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:45,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916608772] [2021-08-21 18:48:45,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:48:45,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:45,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:45,876 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) [2021-08-21 18:48:45,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 18:48:47,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:48:47,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:47,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:48:47,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:47,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916608772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:47,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:47,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 18:48:47,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264545578] [2021-08-21 18:48:47,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:48:47,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:47,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:48:47,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:48:47,791 INFO L87 Difference]: Start difference. First operand 2247 states and 5211 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:48,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:48,480 INFO L93 Difference]: Finished difference Result 4605 states and 9750 transitions. [2021-08-21 18:48:48,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:48:48,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:48:48,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:48,486 INFO L225 Difference]: With dead ends: 4605 [2021-08-21 18:48:48,486 INFO L226 Difference]: Without dead ends: 4605 [2021-08-21 18:48:48,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 499.1ms TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:48:48,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2021-08-21 18:48:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 2321. [2021-08-21 18:48:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2320 states have (on average 2.3224137931034483) internal successors, (5388), 2320 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 5388 transitions. [2021-08-21 18:48:48,526 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 5388 transitions. Word has length 28 [2021-08-21 18:48:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:48,526 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 5388 transitions. [2021-08-21 18:48:48,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 5388 transitions. [2021-08-21 18:48:48,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:48,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:48,529 INFO L512 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] [2021-08-21 18:48:48,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-21 18:48:48,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-21 18:48:48,729 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:48,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:48,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1869804056, now seen corresponding path program 25 times [2021-08-21 18:48:48,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:48,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96800618] [2021-08-21 18:48:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:48,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:48:48,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:48,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96800618] [2021-08-21 18:48:48,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96800618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:48,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264729299] [2021-08-21 18:48:48,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:48:48,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:48,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:48,785 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) [2021-08-21 18:48:48,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 18:48:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:50,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:48:50,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:50,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264729299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:50,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:50,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-21 18:48:50,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500343166] [2021-08-21 18:48:50,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:48:50,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:50,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:48:50,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:48:50,705 INFO L87 Difference]: Start difference. First operand 2321 states and 5388 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:51,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:51,260 INFO L93 Difference]: Finished difference Result 4327 states and 9159 transitions. [2021-08-21 18:48:51,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:48:51,260 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:48:51,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:51,266 INFO L225 Difference]: With dead ends: 4327 [2021-08-21 18:48:51,266 INFO L226 Difference]: Without dead ends: 4327 [2021-08-21 18:48:51,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 395.1ms TimeCoverageRelationStatistics Valid=547, Invalid=1523, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:48:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4327 states. [2021-08-21 18:48:51,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4327 to 2319. [2021-08-21 18:48:51,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2318 states have (on average 2.3218291630716132) internal successors, (5382), 2318 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:51,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 5382 transitions. [2021-08-21 18:48:51,305 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 5382 transitions. Word has length 28 [2021-08-21 18:48:51,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:51,305 INFO L470 AbstractCegarLoop]: Abstraction has 2319 states and 5382 transitions. [2021-08-21 18:48:51,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 5382 transitions. [2021-08-21 18:48:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:51,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:51,308 INFO L512 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] [2021-08-21 18:48:51,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 18:48:51,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:51,517 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:51,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1360771736, now seen corresponding path program 45 times [2021-08-21 18:48:51,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:51,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136771536] [2021-08-21 18:48:51,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:51,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:48:51,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:51,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136771536] [2021-08-21 18:48:51,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136771536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:51,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059924867] [2021-08-21 18:48:51,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:48:51,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:51,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:51,563 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) [2021-08-21 18:48:51,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 18:48:53,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:48:53,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:53,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:48:53,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:53,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059924867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:53,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:53,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 18:48:53,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739630303] [2021-08-21 18:48:53,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:48:53,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:53,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:48:53,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:48:53,485 INFO L87 Difference]: Start difference. First operand 2319 states and 5382 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:53,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:53,779 INFO L93 Difference]: Finished difference Result 3032 states and 6689 transitions. [2021-08-21 18:48:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:48:53,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:48:53,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:53,783 INFO L225 Difference]: With dead ends: 3032 [2021-08-21 18:48:53,783 INFO L226 Difference]: Without dead ends: 3026 [2021-08-21 18:48:53,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:48:53,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2021-08-21 18:48:53,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2640. [2021-08-21 18:48:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 2.3289124668435015) internal successors, (6146), 2639 states have internal predecessors, (6146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:53,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 6146 transitions. [2021-08-21 18:48:53,819 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 6146 transitions. Word has length 28 [2021-08-21 18:48:53,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:53,820 INFO L470 AbstractCegarLoop]: Abstraction has 2640 states and 6146 transitions. [2021-08-21 18:48:53,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:53,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 6146 transitions. [2021-08-21 18:48:53,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:53,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:53,823 INFO L512 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] [2021-08-21 18:48:53,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 18:48:54,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:54,024 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:54,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1084447976, now seen corresponding path program 26 times [2021-08-21 18:48:54,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:54,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369640380] [2021-08-21 18:48:54,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:54,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:48:54,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:54,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369640380] [2021-08-21 18:48:54,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369640380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:54,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662307224] [2021-08-21 18:48:54,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:48:54,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:54,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:54,081 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) [2021-08-21 18:48:54,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 18:48:55,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:48:55,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:55,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:48:55,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:56,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662307224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:56,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:56,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 18:48:56,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621946911] [2021-08-21 18:48:56,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:48:56,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:56,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:48:56,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:48:56,082 INFO L87 Difference]: Start difference. First operand 2640 states and 6146 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:56,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:56,347 INFO L93 Difference]: Finished difference Result 3136 states and 7017 transitions. [2021-08-21 18:48:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:48:56,348 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:48:56,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:56,353 INFO L225 Difference]: With dead ends: 3136 [2021-08-21 18:48:56,353 INFO L226 Difference]: Without dead ends: 3130 [2021-08-21 18:48:56,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:48:56,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3130 states. [2021-08-21 18:48:56,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3130 to 2575. [2021-08-21 18:48:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2574 states have (on average 2.3271173271173273) internal successors, (5990), 2574 states have internal predecessors, (5990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 5990 transitions. [2021-08-21 18:48:56,388 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 5990 transitions. Word has length 28 [2021-08-21 18:48:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:56,388 INFO L470 AbstractCegarLoop]: Abstraction has 2575 states and 5990 transitions. [2021-08-21 18:48:56,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 5990 transitions. [2021-08-21 18:48:56,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:56,391 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:56,391 INFO L512 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] [2021-08-21 18:48:56,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-21 18:48:56,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:56,592 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:56,592 INFO L82 PathProgramCache]: Analyzing trace with hash 169344360, now seen corresponding path program 46 times [2021-08-21 18:48:56,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:56,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636269182] [2021-08-21 18:48:56,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:56,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:56,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:48:56,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:56,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636269182] [2021-08-21 18:48:56,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636269182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:56,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539285969] [2021-08-21 18:48:56,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:48:56,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:56,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:56,639 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) [2021-08-21 18:48:56,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 18:48:58,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:48:58,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:58,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:48:58,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:58,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539285969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:58,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:58,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 18:48:58,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543951262] [2021-08-21 18:48:58,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:48:58,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:58,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:48:58,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:48:58,601 INFO L87 Difference]: Start difference. First operand 2575 states and 5990 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:58,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:58,928 INFO L93 Difference]: Finished difference Result 2898 states and 6432 transitions. [2021-08-21 18:48:58,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:48:58,929 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:48:58,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:58,932 INFO L225 Difference]: With dead ends: 2898 [2021-08-21 18:48:58,932 INFO L226 Difference]: Without dead ends: 2892 [2021-08-21 18:48:58,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:48:58,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2021-08-21 18:48:58,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2551. [2021-08-21 18:48:58,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 2550 states have (on average 2.3258823529411763) internal successors, (5931), 2550 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:58,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 5931 transitions. [2021-08-21 18:48:58,964 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 5931 transitions. Word has length 28 [2021-08-21 18:48:58,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:58,964 INFO L470 AbstractCegarLoop]: Abstraction has 2551 states and 5931 transitions. [2021-08-21 18:48:58,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:58,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 5931 transitions. [2021-08-21 18:48:58,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:48:58,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:58,968 INFO L512 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] [2021-08-21 18:48:58,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 18:48:59,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-21 18:48:59,168 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:59,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:59,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2138168680, now seen corresponding path program 47 times [2021-08-21 18:48:59,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:59,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833302933] [2021-08-21 18:48:59,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:59,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:59,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:59,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833302933] [2021-08-21 18:48:59,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833302933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:59,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534635482] [2021-08-21 18:48:59,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:48:59,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:59,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:59,220 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) [2021-08-21 18:48:59,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 18:49:01,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:49:01,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:01,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:49:01,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:01,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534635482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:01,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:01,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-21 18:49:01,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56018461] [2021-08-21 18:49:01,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:49:01,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:01,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:49:01,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:49:01,173 INFO L87 Difference]: Start difference. First operand 2551 states and 5931 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-08-21 18:49:01,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:01,503 INFO L93 Difference]: Finished difference Result 2996 states and 6655 transitions. [2021-08-21 18:49:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:49:01,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-08-21 18:49:01,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:01,507 INFO L225 Difference]: With dead ends: 2996 [2021-08-21 18:49:01,507 INFO L226 Difference]: Without dead ends: 2992 [2021-08-21 18:49:01,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 220.5ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:49:01,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-08-21 18:49:01,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2551. [2021-08-21 18:49:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 2550 states have (on average 2.3250980392156864) internal successors, (5929), 2550 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:01,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 5929 transitions. [2021-08-21 18:49:01,538 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 5929 transitions. Word has length 28 [2021-08-21 18:49:01,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:01,538 INFO L470 AbstractCegarLoop]: Abstraction has 2551 states and 5929 transitions. [2021-08-21 18:49:01,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-08-21 18:49:01,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 5929 transitions. [2021-08-21 18:49:01,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:01,542 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:01,542 INFO L512 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] [2021-08-21 18:49:01,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-21 18:49:01,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:01,742 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:01,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:01,743 INFO L82 PathProgramCache]: Analyzing trace with hash 565783912, now seen corresponding path program 48 times [2021-08-21 18:49:01,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:01,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751607531] [2021-08-21 18:49:01,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:01,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:01,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:01,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751607531] [2021-08-21 18:49:01,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751607531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:01,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445628089] [2021-08-21 18:49:01,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:49:01,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:01,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:01,795 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) [2021-08-21 18:49:01,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 18:49:03,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:49:03,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:03,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:49:03,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:03,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445628089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:03,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:03,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-21 18:49:03,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14805330] [2021-08-21 18:49:03,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:49:03,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:03,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:49:03,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:49:03,771 INFO L87 Difference]: Start difference. First operand 2551 states and 5929 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-08-21 18:49:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:04,241 INFO L93 Difference]: Finished difference Result 3093 states and 6910 transitions. [2021-08-21 18:49:04,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:49:04,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-08-21 18:49:04,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:04,245 INFO L225 Difference]: With dead ends: 3093 [2021-08-21 18:49:04,245 INFO L226 Difference]: Without dead ends: 3093 [2021-08-21 18:49:04,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 347.7ms TimeCoverageRelationStatistics Valid=455, Invalid=1351, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:49:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-08-21 18:49:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 2523. [2021-08-21 18:49:04,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2523 states, 2522 states have (on average 2.330689928628073) internal successors, (5878), 2522 states have internal predecessors, (5878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2523 states to 2523 states and 5878 transitions. [2021-08-21 18:49:04,275 INFO L78 Accepts]: Start accepts. Automaton has 2523 states and 5878 transitions. Word has length 28 [2021-08-21 18:49:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:04,275 INFO L470 AbstractCegarLoop]: Abstraction has 2523 states and 5878 transitions. [2021-08-21 18:49:04,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-08-21 18:49:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2523 states and 5878 transitions. [2021-08-21 18:49:04,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:04,278 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:04,278 INFO L512 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] [2021-08-21 18:49:04,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-21 18:49:04,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:04,479 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:04,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:04,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1859471148, now seen corresponding path program 49 times [2021-08-21 18:49:04,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:04,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110044475] [2021-08-21 18:49:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:04,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:04,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:04,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110044475] [2021-08-21 18:49:04,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110044475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:04,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982399590] [2021-08-21 18:49:04,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:49:04,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:04,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:04,537 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) [2021-08-21 18:49:04,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 18:49:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:06,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:49:06,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:06,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982399590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:06,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:06,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:49:06,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047410493] [2021-08-21 18:49:06,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:49:06,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:06,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:49:06,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:49:06,540 INFO L87 Difference]: Start difference. First operand 2523 states and 5878 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) [2021-08-21 18:49:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:06,873 INFO L93 Difference]: Finished difference Result 3227 states and 7181 transitions. [2021-08-21 18:49:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:49:06,873 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 28 [2021-08-21 18:49:06,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:06,877 INFO L225 Difference]: With dead ends: 3227 [2021-08-21 18:49:06,877 INFO L226 Difference]: Without dead ends: 3223 [2021-08-21 18:49:06,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 248.5ms TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:49:06,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2021-08-21 18:49:06,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 2676. [2021-08-21 18:49:06,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2675 states have (on average 2.3416822429906543) internal successors, (6264), 2675 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:06,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 6264 transitions. [2021-08-21 18:49:06,913 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 6264 transitions. Word has length 28 [2021-08-21 18:49:06,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:06,913 INFO L470 AbstractCegarLoop]: Abstraction has 2676 states and 6264 transitions. [2021-08-21 18:49:06,913 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) [2021-08-21 18:49:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 6264 transitions. [2021-08-21 18:49:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:06,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:06,916 INFO L512 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] [2021-08-21 18:49:06,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 18:49:07,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 18:49:07,117 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:07,117 INFO L82 PathProgramCache]: Analyzing trace with hash 287086380, now seen corresponding path program 50 times [2021-08-21 18:49:07,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:07,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877288042] [2021-08-21 18:49:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:07,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:07,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:07,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877288042] [2021-08-21 18:49:07,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877288042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:07,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861570803] [2021-08-21 18:49:07,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:49:07,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:07,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:07,174 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) [2021-08-21 18:49:07,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 18:49:09,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:49:09,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:09,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:49:09,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:09,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861570803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:09,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:09,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:49:09,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356817630] [2021-08-21 18:49:09,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:49:09,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:09,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:49:09,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:49:09,142 INFO L87 Difference]: Start difference. First operand 2676 states and 6264 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) [2021-08-21 18:49:09,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:09,638 INFO L93 Difference]: Finished difference Result 2968 states and 6681 transitions. [2021-08-21 18:49:09,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:49:09,638 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 28 [2021-08-21 18:49:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:09,642 INFO L225 Difference]: With dead ends: 2968 [2021-08-21 18:49:09,642 INFO L226 Difference]: Without dead ends: 2968 [2021-08-21 18:49:09,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 334.7ms TimeCoverageRelationStatistics Valid=467, Invalid=1255, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:49:09,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2021-08-21 18:49:09,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 2659. [2021-08-21 18:49:09,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2658 states have (on average 2.3416102332580886) internal successors, (6224), 2658 states have internal predecessors, (6224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 6224 transitions. [2021-08-21 18:49:09,675 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 6224 transitions. Word has length 28 [2021-08-21 18:49:09,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:09,676 INFO L470 AbstractCegarLoop]: Abstraction has 2659 states and 6224 transitions. [2021-08-21 18:49:09,676 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) [2021-08-21 18:49:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 6224 transitions. [2021-08-21 18:49:09,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:09,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:09,679 INFO L512 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] [2021-08-21 18:49:09,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-21 18:49:09,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 18:49:09,881 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:09,881 INFO L82 PathProgramCache]: Analyzing trace with hash -70765840, now seen corresponding path program 51 times [2021-08-21 18:49:09,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:09,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395347341] [2021-08-21 18:49:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:09,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:09,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:09,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395347341] [2021-08-21 18:49:09,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395347341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:09,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365379864] [2021-08-21 18:49:09,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:49:09,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:09,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:09,942 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) [2021-08-21 18:49:09,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 18:49:11,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:49:11,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:11,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:49:11,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:11,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365379864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:11,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:11,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:49:11,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254168424] [2021-08-21 18:49:11,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:49:11,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:11,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:49:11,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:49:11,986 INFO L87 Difference]: Start difference. First operand 2659 states and 6224 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) [2021-08-21 18:49:12,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:12,483 INFO L93 Difference]: Finished difference Result 3513 states and 7916 transitions. [2021-08-21 18:49:12,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:49:12,483 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 28 [2021-08-21 18:49:12,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:12,487 INFO L225 Difference]: With dead ends: 3513 [2021-08-21 18:49:12,487 INFO L226 Difference]: Without dead ends: 3513 [2021-08-21 18:49:12,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 346.3ms TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:49:12,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2021-08-21 18:49:12,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 2781. [2021-08-21 18:49:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2781 states, 2780 states have (on average 2.337410071942446) internal successors, (6498), 2780 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:12,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2781 states to 2781 states and 6498 transitions. [2021-08-21 18:49:12,522 INFO L78 Accepts]: Start accepts. Automaton has 2781 states and 6498 transitions. Word has length 28 [2021-08-21 18:49:12,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:12,522 INFO L470 AbstractCegarLoop]: Abstraction has 2781 states and 6498 transitions. [2021-08-21 18:49:12,522 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) [2021-08-21 18:49:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2781 states and 6498 transitions. [2021-08-21 18:49:12,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:12,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:12,526 INFO L512 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] [2021-08-21 18:49:12,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-21 18:49:12,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:12,726 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:12,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:12,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1294751916, now seen corresponding path program 27 times [2021-08-21 18:49:12,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:12,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925466361] [2021-08-21 18:49:12,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:12,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:12,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:12,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925466361] [2021-08-21 18:49:12,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925466361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:12,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908464381] [2021-08-21 18:49:12,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:49:12,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:12,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:12,781 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) [2021-08-21 18:49:12,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 18:49:14,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:49:14,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:14,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:49:14,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:14,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908464381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:14,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:14,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 18:49:14,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426245356] [2021-08-21 18:49:14,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:49:14,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:14,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:49:14,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:49:14,841 INFO L87 Difference]: Start difference. First operand 2781 states and 6498 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:15,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:15,855 INFO L93 Difference]: Finished difference Result 9619 states and 19909 transitions. [2021-08-21 18:49:15,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 18:49:15,855 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:49:15,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:15,869 INFO L225 Difference]: With dead ends: 9619 [2021-08-21 18:49:15,869 INFO L226 Difference]: Without dead ends: 9619 [2021-08-21 18:49:15,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 770.2ms TimeCoverageRelationStatistics Valid=1259, Invalid=4291, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 18:49:15,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9619 states. [2021-08-21 18:49:15,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9619 to 3874. [2021-08-21 18:49:15,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3874 states, 3873 states have (on average 2.3764523625096823) internal successors, (9204), 3873 states have internal predecessors, (9204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3874 states to 3874 states and 9204 transitions. [2021-08-21 18:49:15,990 INFO L78 Accepts]: Start accepts. Automaton has 3874 states and 9204 transitions. Word has length 28 [2021-08-21 18:49:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:15,990 INFO L470 AbstractCegarLoop]: Abstraction has 3874 states and 9204 transitions. [2021-08-21 18:49:15,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 3874 states and 9204 transitions. [2021-08-21 18:49:15,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:15,995 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:15,995 INFO L512 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] [2021-08-21 18:49:16,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:16,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:16,197 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1476783376, now seen corresponding path program 52 times [2021-08-21 18:49:16,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:16,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793999118] [2021-08-21 18:49:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:16,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:16,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:16,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793999118] [2021-08-21 18:49:16,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793999118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:16,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845076507] [2021-08-21 18:49:16,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:49:16,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:16,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:16,248 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) [2021-08-21 18:49:16,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 18:49:18,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:49:18,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:18,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:49:18,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:18,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845076507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:18,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:18,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 18:49:18,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898889120] [2021-08-21 18:49:18,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:49:18,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:18,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:49:18,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:49:18,281 INFO L87 Difference]: Start difference. First operand 3874 states and 9204 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:18,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:18,879 INFO L93 Difference]: Finished difference Result 4815 states and 11088 transitions. [2021-08-21 18:49:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:49:18,879 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:49:18,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:18,885 INFO L225 Difference]: With dead ends: 4815 [2021-08-21 18:49:18,885 INFO L226 Difference]: Without dead ends: 4815 [2021-08-21 18:49:18,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 425.3ms TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:49:18,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4815 states. [2021-08-21 18:49:18,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4815 to 4018. [2021-08-21 18:49:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4018 states, 4017 states have (on average 2.3594722429673887) internal successors, (9478), 4017 states have internal predecessors, (9478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:18,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4018 states to 4018 states and 9478 transitions. [2021-08-21 18:49:18,936 INFO L78 Accepts]: Start accepts. Automaton has 4018 states and 9478 transitions. Word has length 28 [2021-08-21 18:49:18,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:18,936 INFO L470 AbstractCegarLoop]: Abstraction has 4018 states and 9478 transitions. [2021-08-21 18:49:18,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:18,936 INFO L276 IsEmpty]: Start isEmpty. Operand 4018 states and 9478 transitions. [2021-08-21 18:49:18,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:18,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:18,941 INFO L512 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] [2021-08-21 18:49:18,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:19,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-21 18:49:19,157 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:19,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:19,157 INFO L82 PathProgramCache]: Analyzing trace with hash -741118356, now seen corresponding path program 53 times [2021-08-21 18:49:19,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:19,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133526430] [2021-08-21 18:49:19,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:19,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:19,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:19,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133526430] [2021-08-21 18:49:19,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133526430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:19,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540135429] [2021-08-21 18:49:19,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:49:19,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:19,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:19,217 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) [2021-08-21 18:49:19,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 18:49:21,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:49:21,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:21,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:49:21,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:21,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540135429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:21,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:21,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 18:49:21,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937341956] [2021-08-21 18:49:21,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:49:21,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:21,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:49:21,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:49:21,288 INFO L87 Difference]: Start difference. First operand 4018 states and 9478 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) [2021-08-21 18:49:21,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:21,709 INFO L93 Difference]: Finished difference Result 7173 states and 15368 transitions. [2021-08-21 18:49:21,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:49:21,709 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 28 [2021-08-21 18:49:21,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:21,719 INFO L225 Difference]: With dead ends: 7173 [2021-08-21 18:49:21,719 INFO L226 Difference]: Without dead ends: 7173 [2021-08-21 18:49:21,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 293.6ms TimeCoverageRelationStatistics Valid=390, Invalid=1250, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:49:21,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7173 states. [2021-08-21 18:49:21,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7173 to 4297. [2021-08-21 18:49:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4297 states, 4296 states have (on average 2.3696461824953445) internal successors, (10180), 4296 states have internal predecessors, (10180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:21,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4297 states to 4297 states and 10180 transitions. [2021-08-21 18:49:21,817 INFO L78 Accepts]: Start accepts. Automaton has 4297 states and 10180 transitions. Word has length 28 [2021-08-21 18:49:21,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:21,817 INFO L470 AbstractCegarLoop]: Abstraction has 4297 states and 10180 transitions. [2021-08-21 18:49:21,817 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) [2021-08-21 18:49:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 4297 states and 10180 transitions. [2021-08-21 18:49:21,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:21,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:21,824 INFO L512 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] [2021-08-21 18:49:21,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:22,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:22,026 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:22,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:22,027 INFO L82 PathProgramCache]: Analyzing trace with hash 2062354028, now seen corresponding path program 54 times [2021-08-21 18:49:22,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:22,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099218980] [2021-08-21 18:49:22,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:22,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:22,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:22,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099218980] [2021-08-21 18:49:22,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099218980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:22,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255089023] [2021-08-21 18:49:22,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:49:22,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:22,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:22,110 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) [2021-08-21 18:49:22,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 18:49:24,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:49:24,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:24,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:49:24,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:24,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255089023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:24,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:24,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 18:49:24,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398331054] [2021-08-21 18:49:24,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:49:24,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:24,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:49:24,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:49:24,205 INFO L87 Difference]: Start difference. First operand 4297 states and 10180 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) [2021-08-21 18:49:24,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:24,887 INFO L93 Difference]: Finished difference Result 7583 states and 16111 transitions. [2021-08-21 18:49:24,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 18:49:24,887 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 28 [2021-08-21 18:49:24,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:24,898 INFO L225 Difference]: With dead ends: 7583 [2021-08-21 18:49:24,898 INFO L226 Difference]: Without dead ends: 7583 [2021-08-21 18:49:24,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 501.1ms TimeCoverageRelationStatistics Valid=750, Invalid=2672, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:49:24,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7583 states. [2021-08-21 18:49:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7583 to 4194. [2021-08-21 18:49:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4194 states, 4193 states have (on average 2.352730741712378) internal successors, (9865), 4193 states have internal predecessors, (9865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4194 states to 4194 states and 9865 transitions. [2021-08-21 18:49:24,974 INFO L78 Accepts]: Start accepts. Automaton has 4194 states and 9865 transitions. Word has length 28 [2021-08-21 18:49:24,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:24,975 INFO L470 AbstractCegarLoop]: Abstraction has 4194 states and 9865 transitions. [2021-08-21 18:49:24,975 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) [2021-08-21 18:49:24,975 INFO L276 IsEmpty]: Start isEmpty. Operand 4194 states and 9865 transitions. [2021-08-21 18:49:24,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:24,979 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:24,980 INFO L512 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] [2021-08-21 18:49:25,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:25,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:25,180 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:25,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:25,181 INFO L82 PathProgramCache]: Analyzing trace with hash -47923992, now seen corresponding path program 55 times [2021-08-21 18:49:25,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:25,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580600658] [2021-08-21 18:49:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:25,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:25,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:25,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580600658] [2021-08-21 18:49:25,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580600658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:25,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269795927] [2021-08-21 18:49:25,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:49:25,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:25,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:25,268 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) [2021-08-21 18:49:25,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 18:49:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:27,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:49:27,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:27,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269795927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:27,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:27,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-21 18:49:27,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868607565] [2021-08-21 18:49:27,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:49:27,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:27,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:49:27,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:49:27,316 INFO L87 Difference]: Start difference. First operand 4194 states and 9865 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-08-21 18:49:27,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:27,408 INFO L93 Difference]: Finished difference Result 5475 states and 12543 transitions. [2021-08-21 18:49:27,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:49:27,409 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 28 [2021-08-21 18:49:27,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:27,416 INFO L225 Difference]: With dead ends: 5475 [2021-08-21 18:49:27,416 INFO L226 Difference]: Without dead ends: 5473 [2021-08-21 18:49:27,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:49:27,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2021-08-21 18:49:27,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 4296. [2021-08-21 18:49:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4296 states, 4295 states have (on average 2.3552968568102446) internal successors, (10116), 4295 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:27,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 10116 transitions. [2021-08-21 18:49:27,478 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 10116 transitions. Word has length 28 [2021-08-21 18:49:27,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:27,478 INFO L470 AbstractCegarLoop]: Abstraction has 4296 states and 10116 transitions. [2021-08-21 18:49:27,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-08-21 18:49:27,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 10116 transitions. [2021-08-21 18:49:27,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:27,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:27,484 INFO L512 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] [2021-08-21 18:49:27,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-21 18:49:27,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-21 18:49:27,684 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:27,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1897671576, now seen corresponding path program 56 times [2021-08-21 18:49:27,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:27,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639600125] [2021-08-21 18:49:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:27,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:27,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:27,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639600125] [2021-08-21 18:49:27,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639600125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:27,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180619247] [2021-08-21 18:49:27,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:49:27,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:27,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:27,747 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) [2021-08-21 18:49:27,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 18:49:29,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:49:29,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:29,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:49:29,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:29,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180619247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:29,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:29,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-21 18:49:29,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813091290] [2021-08-21 18:49:29,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:49:29,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:29,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:49:29,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:49:29,829 INFO L87 Difference]: Start difference. First operand 4296 states and 10116 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:29,957 INFO L93 Difference]: Finished difference Result 6096 states and 13920 transitions. [2021-08-21 18:49:29,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:49:29,958 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:49:29,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:29,965 INFO L225 Difference]: With dead ends: 6096 [2021-08-21 18:49:29,965 INFO L226 Difference]: Without dead ends: 6084 [2021-08-21 18:49:29,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:49:29,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6084 states. [2021-08-21 18:49:30,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6084 to 5638. [2021-08-21 18:49:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5638 states, 5637 states have (on average 2.336703920525102) internal successors, (13172), 5637 states have internal predecessors, (13172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:30,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5638 states to 5638 states and 13172 transitions. [2021-08-21 18:49:30,037 INFO L78 Accepts]: Start accepts. Automaton has 5638 states and 13172 transitions. Word has length 28 [2021-08-21 18:49:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:30,038 INFO L470 AbstractCegarLoop]: Abstraction has 5638 states and 13172 transitions. [2021-08-21 18:49:30,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:30,038 INFO L276 IsEmpty]: Start isEmpty. Operand 5638 states and 13172 transitions. [2021-08-21 18:49:30,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:30,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:30,044 INFO L512 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] [2021-08-21 18:49:30,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-21 18:49:30,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:30,244 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:30,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:30,244 INFO L82 PathProgramCache]: Analyzing trace with hash -843950872, now seen corresponding path program 57 times [2021-08-21 18:49:30,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:30,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245905201] [2021-08-21 18:49:30,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:30,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:30,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:30,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245905201] [2021-08-21 18:49:30,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245905201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:30,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842612551] [2021-08-21 18:49:30,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:49:30,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:30,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:30,294 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) [2021-08-21 18:49:30,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 18:49:32,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:49:32,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:32,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:49:32,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:32,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842612551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:32,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:32,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-21 18:49:32,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519459979] [2021-08-21 18:49:32,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:49:32,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:32,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:49:32,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:49:32,433 INFO L87 Difference]: Start difference. First operand 5638 states and 13172 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-08-21 18:49:32,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:32,540 INFO L93 Difference]: Finished difference Result 6706 states and 15321 transitions. [2021-08-21 18:49:32,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:49:32,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 28 [2021-08-21 18:49:32,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:32,550 INFO L225 Difference]: With dead ends: 6706 [2021-08-21 18:49:32,550 INFO L226 Difference]: Without dead ends: 6706 [2021-08-21 18:49:32,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:49:32,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6706 states. [2021-08-21 18:49:32,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6706 to 5446. [2021-08-21 18:49:32,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5446 states, 5445 states have (on average 2.323048668503214) internal successors, (12649), 5445 states have internal predecessors, (12649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:32,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5446 states to 5446 states and 12649 transitions. [2021-08-21 18:49:32,625 INFO L78 Accepts]: Start accepts. Automaton has 5446 states and 12649 transitions. Word has length 28 [2021-08-21 18:49:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:32,625 INFO L470 AbstractCegarLoop]: Abstraction has 5446 states and 12649 transitions. [2021-08-21 18:49:32,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-08-21 18:49:32,625 INFO L276 IsEmpty]: Start isEmpty. Operand 5446 states and 12649 transitions. [2021-08-21 18:49:32,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:32,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:32,631 INFO L512 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] [2021-08-21 18:49:32,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:32,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:32,831 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:32,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:32,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1591637096, now seen corresponding path program 58 times [2021-08-21 18:49:32,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:32,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101428793] [2021-08-21 18:49:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:32,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:32,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:32,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101428793] [2021-08-21 18:49:32,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101428793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:32,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023573849] [2021-08-21 18:49:32,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:49:32,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:32,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:32,888 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) [2021-08-21 18:49:32,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 18:49:34,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:49:34,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:34,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:49:34,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:35,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023573849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:35,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:35,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 18:49:35,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147491102] [2021-08-21 18:49:35,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:49:35,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:35,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:49:35,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:49:35,043 INFO L87 Difference]: Start difference. First operand 5446 states and 12649 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:35,220 INFO L93 Difference]: Finished difference Result 5633 states and 12843 transitions. [2021-08-21 18:49:35,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:49:35,220 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:49:35,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:35,227 INFO L225 Difference]: With dead ends: 5633 [2021-08-21 18:49:35,227 INFO L226 Difference]: Without dead ends: 5633 [2021-08-21 18:49:35,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:49:35,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5633 states. [2021-08-21 18:49:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5633 to 5256. [2021-08-21 18:49:35,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5256 states, 5255 states have (on average 2.314557564224548) internal successors, (12163), 5255 states have internal predecessors, (12163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:35,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5256 states to 5256 states and 12163 transitions. [2021-08-21 18:49:35,294 INFO L78 Accepts]: Start accepts. Automaton has 5256 states and 12163 transitions. Word has length 28 [2021-08-21 18:49:35,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:35,294 INFO L470 AbstractCegarLoop]: Abstraction has 5256 states and 12163 transitions. [2021-08-21 18:49:35,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:35,294 INFO L276 IsEmpty]: Start isEmpty. Operand 5256 states and 12163 transitions. [2021-08-21 18:49:35,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:35,300 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:35,300 INFO L512 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] [2021-08-21 18:49:35,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:35,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-21 18:49:35,501 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:35,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:35,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1097704024, now seen corresponding path program 59 times [2021-08-21 18:49:35,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:35,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62054064] [2021-08-21 18:49:35,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:35,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:35,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:35,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62054064] [2021-08-21 18:49:35,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62054064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:35,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571431673] [2021-08-21 18:49:35,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:49:35,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:35,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:35,560 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) [2021-08-21 18:49:35,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 18:49:37,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:49:37,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:37,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:49:37,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:49:37,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571431673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:37,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:37,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-21 18:49:37,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735091720] [2021-08-21 18:49:37,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:49:37,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:37,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:49:37,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:49:37,695 INFO L87 Difference]: Start difference. First operand 5256 states and 12163 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) [2021-08-21 18:49:37,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:37,796 INFO L93 Difference]: Finished difference Result 5464 states and 12594 transitions. [2021-08-21 18:49:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:49:37,796 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 28 [2021-08-21 18:49:37,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:37,805 INFO L225 Difference]: With dead ends: 5464 [2021-08-21 18:49:37,806 INFO L226 Difference]: Without dead ends: 5464 [2021-08-21 18:49:37,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:49:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5464 states. [2021-08-21 18:49:37,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5464 to 5229. [2021-08-21 18:49:37,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5229 states, 5228 states have (on average 2.3135042081101758) internal successors, (12095), 5228 states have internal predecessors, (12095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:37,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5229 states to 5229 states and 12095 transitions. [2021-08-21 18:49:37,880 INFO L78 Accepts]: Start accepts. Automaton has 5229 states and 12095 transitions. Word has length 28 [2021-08-21 18:49:37,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:37,880 INFO L470 AbstractCegarLoop]: Abstraction has 5229 states and 12095 transitions. [2021-08-21 18:49:37,880 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) [2021-08-21 18:49:37,880 INFO L276 IsEmpty]: Start isEmpty. Operand 5229 states and 12095 transitions. [2021-08-21 18:49:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:37,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:37,909 INFO L512 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] [2021-08-21 18:49:37,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:38,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:38,109 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:38,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:38,110 INFO L82 PathProgramCache]: Analyzing trace with hash 177438376, now seen corresponding path program 60 times [2021-08-21 18:49:38,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:38,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097881620] [2021-08-21 18:49:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:38,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:38,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:38,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097881620] [2021-08-21 18:49:38,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097881620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:38,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033243893] [2021-08-21 18:49:38,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:49:38,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:38,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:38,158 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) [2021-08-21 18:49:38,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 18:49:40,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:49:40,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:40,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:49:40,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:40,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033243893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:40,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:40,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 18:49:40,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815090010] [2021-08-21 18:49:40,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:49:40,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:40,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:49:40,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:49:40,271 INFO L87 Difference]: Start difference. First operand 5229 states and 12095 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:40,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:40,392 INFO L93 Difference]: Finished difference Result 5768 states and 13221 transitions. [2021-08-21 18:49:40,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:49:40,392 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:49:40,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:40,399 INFO L225 Difference]: With dead ends: 5768 [2021-08-21 18:49:40,399 INFO L226 Difference]: Without dead ends: 5768 [2021-08-21 18:49:40,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:49:40,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5768 states. [2021-08-21 18:49:40,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5768 to 5455. [2021-08-21 18:49:40,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5455 states, 5454 states have (on average 2.304913824715805) internal successors, (12571), 5454 states have internal predecessors, (12571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:40,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5455 states to 5455 states and 12571 transitions. [2021-08-21 18:49:40,478 INFO L78 Accepts]: Start accepts. Automaton has 5455 states and 12571 transitions. Word has length 28 [2021-08-21 18:49:40,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:40,478 INFO L470 AbstractCegarLoop]: Abstraction has 5455 states and 12571 transitions. [2021-08-21 18:49:40,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:40,478 INFO L276 IsEmpty]: Start isEmpty. Operand 5455 states and 12571 transitions. [2021-08-21 18:49:40,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:40,486 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:40,486 INFO L512 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] [2021-08-21 18:49:40,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-21 18:49:40,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:40,701 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:40,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1705304104, now seen corresponding path program 61 times [2021-08-21 18:49:40,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:40,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595444247] [2021-08-21 18:49:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:40,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:40,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:40,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595444247] [2021-08-21 18:49:40,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595444247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:40,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887415454] [2021-08-21 18:49:40,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:49:40,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:40,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:40,753 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) [2021-08-21 18:49:40,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 18:49:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:42,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:49:42,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:42,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887415454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:42,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:42,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 18:49:42,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408977494] [2021-08-21 18:49:42,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:49:42,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:42,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:49:42,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:49:42,974 INFO L87 Difference]: Start difference. First operand 5455 states and 12571 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:43,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:43,563 INFO L93 Difference]: Finished difference Result 13358 states and 28122 transitions. [2021-08-21 18:49:43,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:49:43,563 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:49:43,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:43,584 INFO L225 Difference]: With dead ends: 13358 [2021-08-21 18:49:43,585 INFO L226 Difference]: Without dead ends: 13358 [2021-08-21 18:49:43,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 418.2ms TimeCoverageRelationStatistics Valid=638, Invalid=1912, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:49:43,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13358 states. [2021-08-21 18:49:43,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13358 to 7506. [2021-08-21 18:49:43,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7506 states, 7505 states have (on average 2.3264490339773483) internal successors, (17460), 7505 states have internal predecessors, (17460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:43,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7506 states to 7506 states and 17460 transitions. [2021-08-21 18:49:43,734 INFO L78 Accepts]: Start accepts. Automaton has 7506 states and 17460 transitions. Word has length 28 [2021-08-21 18:49:43,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:43,735 INFO L470 AbstractCegarLoop]: Abstraction has 7506 states and 17460 transitions. [2021-08-21 18:49:43,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:43,735 INFO L276 IsEmpty]: Start isEmpty. Operand 7506 states and 17460 transitions. [2021-08-21 18:49:43,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:43,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:43,744 INFO L512 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] [2021-08-21 18:49:43,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:43,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:43,973 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:43,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:43,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1963126568, now seen corresponding path program 62 times [2021-08-21 18:49:43,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:43,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814346184] [2021-08-21 18:49:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:43,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:44,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:44,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814346184] [2021-08-21 18:49:44,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814346184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:44,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359210207] [2021-08-21 18:49:44,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:49:44,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:44,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:44,034 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) [2021-08-21 18:49:44,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 18:49:46,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:49:46,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:46,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:49:46,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:46,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359210207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:46,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:46,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 18:49:46,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264065568] [2021-08-21 18:49:46,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:49:46,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:46,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:49:46,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:49:46,294 INFO L87 Difference]: Start difference. First operand 7506 states and 17460 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:46,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:46,463 INFO L93 Difference]: Finished difference Result 9003 states and 20669 transitions. [2021-08-21 18:49:46,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:49:46,463 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:49:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:46,475 INFO L225 Difference]: With dead ends: 9003 [2021-08-21 18:49:46,476 INFO L226 Difference]: Without dead ends: 8999 [2021-08-21 18:49:46,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:49:46,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8999 states. [2021-08-21 18:49:46,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8999 to 8865. [2021-08-21 18:49:46,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8865 states, 8864 states have (on average 2.3155460288808665) internal successors, (20525), 8864 states have internal predecessors, (20525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:46,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8865 states to 8865 states and 20525 transitions. [2021-08-21 18:49:46,596 INFO L78 Accepts]: Start accepts. Automaton has 8865 states and 20525 transitions. Word has length 28 [2021-08-21 18:49:46,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:46,596 INFO L470 AbstractCegarLoop]: Abstraction has 8865 states and 20525 transitions. [2021-08-21 18:49:46,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:46,596 INFO L276 IsEmpty]: Start isEmpty. Operand 8865 states and 20525 transitions. [2021-08-21 18:49:46,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:46,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:46,606 INFO L512 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] [2021-08-21 18:49:46,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-21 18:49:46,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-21 18:49:46,806 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:46,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:46,806 INFO L82 PathProgramCache]: Analyzing trace with hash 390741800, now seen corresponding path program 63 times [2021-08-21 18:49:46,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:46,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445206555] [2021-08-21 18:49:46,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:46,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:46,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:46,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445206555] [2021-08-21 18:49:46,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445206555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:46,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085475088] [2021-08-21 18:49:46,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:49:46,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:46,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:46,874 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) [2021-08-21 18:49:46,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 18:49:49,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:49:49,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:49,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:49:49,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:49,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085475088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:49,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:49,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 18:49:49,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293231740] [2021-08-21 18:49:49,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:49:49,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:49,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:49:49,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:49:49,176 INFO L87 Difference]: Start difference. First operand 8865 states and 20525 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:49,366 INFO L93 Difference]: Finished difference Result 9020 states and 20714 transitions. [2021-08-21 18:49:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:49:49,366 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:49:49,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:49,385 INFO L225 Difference]: With dead ends: 9020 [2021-08-21 18:49:49,385 INFO L226 Difference]: Without dead ends: 9020 [2021-08-21 18:49:49,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:49:49,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9020 states. [2021-08-21 18:49:49,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9020 to 8802. [2021-08-21 18:49:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8802 states, 8801 states have (on average 2.3137143506419724) internal successors, (20363), 8801 states have internal predecessors, (20363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8802 states to 8802 states and 20363 transitions. [2021-08-21 18:49:49,523 INFO L78 Accepts]: Start accepts. Automaton has 8802 states and 20363 transitions. Word has length 28 [2021-08-21 18:49:49,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:49,523 INFO L470 AbstractCegarLoop]: Abstraction has 8802 states and 20363 transitions. [2021-08-21 18:49:49,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:49,523 INFO L276 IsEmpty]: Start isEmpty. Operand 8802 states and 20363 transitions. [2021-08-21 18:49:49,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:49,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:49,533 INFO L512 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] [2021-08-21 18:49:49,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 18:49:49,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:49,734 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:49,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:49,734 INFO L82 PathProgramCache]: Analyzing trace with hash 32889580, now seen corresponding path program 64 times [2021-08-21 18:49:49,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:49,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375417880] [2021-08-21 18:49:49,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:49,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:49,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:49,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375417880] [2021-08-21 18:49:49,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375417880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:49,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721219306] [2021-08-21 18:49:49,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:49:49,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:49,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:49,790 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) [2021-08-21 18:49:49,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 18:49:51,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:49:51,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:51,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:49:51,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:51,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721219306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:51,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:51,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 18:49:51,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710794925] [2021-08-21 18:49:51,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:49:51,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:51,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:49:51,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:49:51,961 INFO L87 Difference]: Start difference. First operand 8802 states and 20363 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:52,161 INFO L93 Difference]: Finished difference Result 9036 states and 20823 transitions. [2021-08-21 18:49:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:49:52,161 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:49:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:52,173 INFO L225 Difference]: With dead ends: 9036 [2021-08-21 18:49:52,174 INFO L226 Difference]: Without dead ends: 9036 [2021-08-21 18:49:52,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:49:52,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9036 states. [2021-08-21 18:49:52,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9036 to 8930. [2021-08-21 18:49:52,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8930 states, 8929 states have (on average 2.311681039310113) internal successors, (20641), 8929 states have internal predecessors, (20641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:52,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8930 states to 8930 states and 20641 transitions. [2021-08-21 18:49:52,298 INFO L78 Accepts]: Start accepts. Automaton has 8930 states and 20641 transitions. Word has length 28 [2021-08-21 18:49:52,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:52,298 INFO L470 AbstractCegarLoop]: Abstraction has 8930 states and 20641 transitions. [2021-08-21 18:49:52,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:52,298 INFO L276 IsEmpty]: Start isEmpty. Operand 8930 states and 20641 transitions. [2021-08-21 18:49:52,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:52,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:52,308 INFO L512 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] [2021-08-21 18:49:52,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:52,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:52,509 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:52,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:52,509 INFO L82 PathProgramCache]: Analyzing trace with hash 832715244, now seen corresponding path program 65 times [2021-08-21 18:49:52,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:52,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464453388] [2021-08-21 18:49:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:52,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:52,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:52,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464453388] [2021-08-21 18:49:52,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464453388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:52,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452330650] [2021-08-21 18:49:52,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:49:52,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:52,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:52,636 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) [2021-08-21 18:49:52,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 18:49:54,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:49:54,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:54,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:49:54,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:54,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452330650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:54,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:54,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-21 18:49:54,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698152022] [2021-08-21 18:49:54,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:49:54,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:54,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:49:54,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:49:54,845 INFO L87 Difference]: Start difference. First operand 8930 states and 20641 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:55,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:55,108 INFO L93 Difference]: Finished difference Result 9300 states and 21425 transitions. [2021-08-21 18:49:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:49:55,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:49:55,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:55,121 INFO L225 Difference]: With dead ends: 9300 [2021-08-21 18:49:55,121 INFO L226 Difference]: Without dead ends: 9300 [2021-08-21 18:49:55,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:49:55,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9300 states. [2021-08-21 18:49:55,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9300 to 9003. [2021-08-21 18:49:55,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9003 states, 9002 states have (on average 2.311153077093979) internal successors, (20805), 9002 states have internal predecessors, (20805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9003 states to 9003 states and 20805 transitions. [2021-08-21 18:49:55,242 INFO L78 Accepts]: Start accepts. Automaton has 9003 states and 20805 transitions. Word has length 28 [2021-08-21 18:49:55,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:55,243 INFO L470 AbstractCegarLoop]: Abstraction has 9003 states and 20805 transitions. [2021-08-21 18:49:55,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:55,244 INFO L276 IsEmpty]: Start isEmpty. Operand 9003 states and 20805 transitions. [2021-08-21 18:49:55,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:55,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:55,254 INFO L512 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] [2021-08-21 18:49:55,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:55,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:55,454 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:55,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:55,454 INFO L82 PathProgramCache]: Analyzing trace with hash -180039896, now seen corresponding path program 66 times [2021-08-21 18:49:55,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:55,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935611216] [2021-08-21 18:49:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:55,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:55,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:55,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935611216] [2021-08-21 18:49:55,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935611216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:55,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943152764] [2021-08-21 18:49:55,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:49:55,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:55,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:55,522 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) [2021-08-21 18:49:55,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 18:49:57,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:49:57,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:57,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:49:57,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:57,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943152764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:57,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:57,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 18:49:57,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149910435] [2021-08-21 18:49:57,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:49:57,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:57,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:49:57,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:49:57,839 INFO L87 Difference]: Start difference. First operand 9003 states and 20805 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:58,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:58,022 INFO L93 Difference]: Finished difference Result 10062 states and 22885 transitions. [2021-08-21 18:49:58,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:49:58,023 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:49:58,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:58,037 INFO L225 Difference]: With dead ends: 10062 [2021-08-21 18:49:58,037 INFO L226 Difference]: Without dead ends: 10058 [2021-08-21 18:49:58,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:49:58,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10058 states. [2021-08-21 18:49:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10058 to 9848. [2021-08-21 18:49:58,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9848 states, 9847 states have (on average 2.3015131512135674) internal successors, (22663), 9847 states have internal predecessors, (22663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:58,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9848 states to 9848 states and 22663 transitions. [2021-08-21 18:49:58,171 INFO L78 Accepts]: Start accepts. Automaton has 9848 states and 22663 transitions. Word has length 28 [2021-08-21 18:49:58,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:58,171 INFO L470 AbstractCegarLoop]: Abstraction has 9848 states and 22663 transitions. [2021-08-21 18:49:58,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:58,171 INFO L276 IsEmpty]: Start isEmpty. Operand 9848 states and 22663 transitions. [2021-08-21 18:49:58,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:49:58,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:58,181 INFO L512 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] [2021-08-21 18:49:58,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-21 18:49:58,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:58,381 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:58,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:58,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1752424664, now seen corresponding path program 67 times [2021-08-21 18:49:58,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:58,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724234605] [2021-08-21 18:49:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:58,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:58,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:58,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724234605] [2021-08-21 18:49:58,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724234605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:58,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197425292] [2021-08-21 18:49:58,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:49:58,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:58,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:58,455 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) [2021-08-21 18:49:58,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 18:50:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:00,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:50:00,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:00,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197425292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:00,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:00,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 18:50:00,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023173150] [2021-08-21 18:50:00,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:50:00,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:00,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:50:00,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:50:00,690 INFO L87 Difference]: Start difference. First operand 9848 states and 22663 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:00,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:00,960 INFO L93 Difference]: Finished difference Result 10095 states and 22972 transitions. [2021-08-21 18:50:00,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:50:00,961 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:50:00,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:00,975 INFO L225 Difference]: With dead ends: 10095 [2021-08-21 18:50:00,976 INFO L226 Difference]: Without dead ends: 10095 [2021-08-21 18:50:00,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:50:00,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10095 states. [2021-08-21 18:50:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10095 to 8536. [2021-08-21 18:50:01,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8536 states, 8535 states have (on average 2.3102519039250144) internal successors, (19718), 8535 states have internal predecessors, (19718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:01,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8536 states to 8536 states and 19718 transitions. [2021-08-21 18:50:01,098 INFO L78 Accepts]: Start accepts. Automaton has 8536 states and 19718 transitions. Word has length 28 [2021-08-21 18:50:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:01,099 INFO L470 AbstractCegarLoop]: Abstraction has 8536 states and 19718 transitions. [2021-08-21 18:50:01,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:01,099 INFO L276 IsEmpty]: Start isEmpty. Operand 8536 states and 19718 transitions. [2021-08-21 18:50:01,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:50:01,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:01,107 INFO L512 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] [2021-08-21 18:50:01,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-21 18:50:01,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-21 18:50:01,308 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:50:01,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:01,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1310451220, now seen corresponding path program 68 times [2021-08-21 18:50:01,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:01,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002539801] [2021-08-21 18:50:01,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:01,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:01,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:01,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002539801] [2021-08-21 18:50:01,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002539801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:01,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543420621] [2021-08-21 18:50:01,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:01,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:01,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:01,377 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) [2021-08-21 18:50:01,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 18:50:03,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:03,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:03,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:50:03,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:03,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543420621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:03,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:03,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 18:50:03,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814485448] [2021-08-21 18:50:03,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:50:03,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:03,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:50:03,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:50:03,626 INFO L87 Difference]: Start difference. First operand 8536 states and 19718 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:03,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:03,836 INFO L93 Difference]: Finished difference Result 8711 states and 20076 transitions. [2021-08-21 18:50:03,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:50:03,836 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-08-21 18:50:03,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:03,853 INFO L225 Difference]: With dead ends: 8711 [2021-08-21 18:50:03,853 INFO L226 Difference]: Without dead ends: 8711 [2021-08-21 18:50:03,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:50:03,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8711 states. [2021-08-21 18:50:03,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8711 to 8526. [2021-08-21 18:50:03,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8526 states, 8525 states have (on average 2.310615835777126) internal successors, (19698), 8525 states have internal predecessors, (19698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8526 states to 8526 states and 19698 transitions. [2021-08-21 18:50:03,990 INFO L78 Accepts]: Start accepts. Automaton has 8526 states and 19698 transitions. Word has length 28 [2021-08-21 18:50:03,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:03,990 INFO L470 AbstractCegarLoop]: Abstraction has 8526 states and 19698 transitions. [2021-08-21 18:50:03,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:03,990 INFO L276 IsEmpty]: Start isEmpty. Operand 8526 states and 19698 transitions. [2021-08-21 18:50:04,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:50:04,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:04,000 INFO L512 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] [2021-08-21 18:50:04,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-21 18:50:04,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-21 18:50:04,201 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:50:04,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:04,201 INFO L82 PathProgramCache]: Analyzing trace with hash 421394924, now seen corresponding path program 69 times [2021-08-21 18:50:04,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:04,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403564363] [2021-08-21 18:50:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:04,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:04,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:04,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403564363] [2021-08-21 18:50:04,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403564363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:04,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083542886] [2021-08-21 18:50:04,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:04,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:04,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:04,279 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) [2021-08-21 18:50:04,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 18:50:06,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:50:06,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:06,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:50:06,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:06,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083542886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:06,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:06,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-21 18:50:06,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437713303] [2021-08-21 18:50:06,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:50:06,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:06,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:50:06,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:50:06,581 INFO L87 Difference]: Start difference. First operand 8526 states and 19698 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:06,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:06,804 INFO L93 Difference]: Finished difference Result 8740 states and 20127 transitions. [2021-08-21 18:50:06,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:50:06,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:50:06,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:06,816 INFO L225 Difference]: With dead ends: 8740 [2021-08-21 18:50:06,816 INFO L226 Difference]: Without dead ends: 8740 [2021-08-21 18:50:06,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:50:06,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8740 states. [2021-08-21 18:50:06,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8740 to 8514. [2021-08-21 18:50:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8514 states, 8513 states have (on average 2.3101139433807116) internal successors, (19666), 8513 states have internal predecessors, (19666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8514 states to 8514 states and 19666 transitions. [2021-08-21 18:50:06,929 INFO L78 Accepts]: Start accepts. Automaton has 8514 states and 19666 transitions. Word has length 28 [2021-08-21 18:50:06,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:06,929 INFO L470 AbstractCegarLoop]: Abstraction has 8514 states and 19666 transitions. [2021-08-21 18:50:06,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 8514 states and 19666 transitions. [2021-08-21 18:50:06,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:50:06,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:06,939 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:06,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:07,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:07,139 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:50:07,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:07,140 INFO L82 PathProgramCache]: Analyzing trace with hash 330778506, now seen corresponding path program 70 times [2021-08-21 18:50:07,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:07,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924020281] [2021-08-21 18:50:07,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:07,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:07,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:07,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924020281] [2021-08-21 18:50:07,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924020281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:07,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955328172] [2021-08-21 18:50:07,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:50:07,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:07,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:07,394 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) [2021-08-21 18:50:07,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 18:50:09,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:50:09,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:09,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:50:09,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:10,149 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:50:10,149 INFO L388 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 34 treesize of output 25 [2021-08-21 18:50:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:10,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955328172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:10,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:10,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:50:10,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59005797] [2021-08-21 18:50:10,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:50:10,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:10,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:50:10,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:50:10,194 INFO L87 Difference]: Start difference. First operand 8514 states and 19666 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-08-21 18:50:11,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:11,319 INFO L93 Difference]: Finished difference Result 10251 states and 23579 transitions. [2021-08-21 18:50:11,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:50:11,319 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:50:11,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:11,336 INFO L225 Difference]: With dead ends: 10251 [2021-08-21 18:50:11,336 INFO L226 Difference]: Without dead ends: 10241 [2021-08-21 18:50:11,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 983.4ms TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:50:11,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10241 states. [2021-08-21 18:50:11,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10241 to 8571. [2021-08-21 18:50:11,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8571 states, 8570 states have (on average 2.3108518086347725) internal successors, (19804), 8570 states have internal predecessors, (19804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:11,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8571 states to 8571 states and 19804 transitions. [2021-08-21 18:50:11,467 INFO L78 Accepts]: Start accepts. Automaton has 8571 states and 19804 transitions. Word has length 30 [2021-08-21 18:50:11,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:11,467 INFO L470 AbstractCegarLoop]: Abstraction has 8571 states and 19804 transitions. [2021-08-21 18:50:11,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-08-21 18:50:11,467 INFO L276 IsEmpty]: Start isEmpty. Operand 8571 states and 19804 transitions. [2021-08-21 18:50:11,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:50:11,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:11,477 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:11,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-21 18:50:11,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:11,678 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:50:11,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:11,678 INFO L82 PathProgramCache]: Analyzing trace with hash 584567630, now seen corresponding path program 71 times [2021-08-21 18:50:11,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:11,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838411215] [2021-08-21 18:50:11,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:11,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:11,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:11,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838411215] [2021-08-21 18:50:11,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838411215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:11,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853402054] [2021-08-21 18:50:11,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:50:11,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:11,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:11,963 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) [2021-08-21 18:50:11,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 18:50:14,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:50:14,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:14,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:50:14,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:14,829 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:50:14,829 INFO L388 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 34 treesize of output 25 [2021-08-21 18:50:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:14,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853402054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:14,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:14,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:50:14,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660118194] [2021-08-21 18:50:14,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:50:14,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:14,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:50:14,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:50:14,893 INFO L87 Difference]: Start difference. First operand 8571 states and 19804 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:50:16,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:16,056 INFO L93 Difference]: Finished difference Result 10253 states and 23593 transitions. [2021-08-21 18:50:16,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:50:16,057 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-21 18:50:16,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:16,073 INFO L225 Difference]: With dead ends: 10253 [2021-08-21 18:50:16,073 INFO L226 Difference]: Without dead ends: 10248 [2021-08-21 18:50:16,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1044.7ms TimeCoverageRelationStatistics Valid=271, Invalid=1289, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:50:16,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10248 states. [2021-08-21 18:50:16,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10248 to 8575. [2021-08-21 18:50:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8575 states, 8574 states have (on average 2.310940051317938) internal successors, (19814), 8574 states have internal predecessors, (19814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8575 states to 8575 states and 19814 transitions. [2021-08-21 18:50:16,208 INFO L78 Accepts]: Start accepts. Automaton has 8575 states and 19814 transitions. Word has length 30 [2021-08-21 18:50:16,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:16,208 INFO L470 AbstractCegarLoop]: Abstraction has 8575 states and 19814 transitions. [2021-08-21 18:50:16,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:50:16,208 INFO L276 IsEmpty]: Start isEmpty. Operand 8575 states and 19814 transitions. [2021-08-21 18:50:16,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:50:16,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:16,218 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:16,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-21 18:50:16,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-21 18:50:16,419 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:50:16,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:16,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1518969078, now seen corresponding path program 72 times [2021-08-21 18:50:16,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:16,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011149436] [2021-08-21 18:50:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:16,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:16,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:16,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011149436] [2021-08-21 18:50:16,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011149436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:16,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621543699] [2021-08-21 18:50:16,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:50:16,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:16,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:16,804 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) [2021-08-21 18:50:16,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 18:50:19,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:50:19,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:19,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:50:19,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:19,527 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:50:19,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-21 18:50:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:19,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621543699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:19,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:19,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:50:19,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753276576] [2021-08-21 18:50:19,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:50:19,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:19,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:50:19,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:50:19,574 INFO L87 Difference]: Start difference. First operand 8575 states and 19814 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-08-21 18:50:21,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:21,934 INFO L93 Difference]: Finished difference Result 8688 states and 19985 transitions. [2021-08-21 18:50:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:50:21,935 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:50:21,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:21,948 INFO L225 Difference]: With dead ends: 8688 [2021-08-21 18:50:21,948 INFO L226 Difference]: Without dead ends: 8683 [2021-08-21 18:50:21,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 2194.0ms TimeCoverageRelationStatistics Valid=308, Invalid=2142, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:50:21,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8683 states. [2021-08-21 18:50:22,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8683 to 8589. [2021-08-21 18:50:22,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8589 states, 8588 states have (on average 2.311597578015836) internal successors, (19852), 8588 states have internal predecessors, (19852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:22,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8589 states to 8589 states and 19852 transitions. [2021-08-21 18:50:22,074 INFO L78 Accepts]: Start accepts. Automaton has 8589 states and 19852 transitions. Word has length 30 [2021-08-21 18:50:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:22,074 INFO L470 AbstractCegarLoop]: Abstraction has 8589 states and 19852 transitions. [2021-08-21 18:50:22,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-08-21 18:50:22,074 INFO L276 IsEmpty]: Start isEmpty. Operand 8589 states and 19852 transitions. [2021-08-21 18:50:22,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:50:22,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:22,084 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:22,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 18:50:22,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:22,285 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:50:22,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:22,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894602, now seen corresponding path program 73 times [2021-08-21 18:50:22,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:22,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371952901] [2021-08-21 18:50:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:22,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:22,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:22,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371952901] [2021-08-21 18:50:22,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371952901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:22,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077953615] [2021-08-21 18:50:22,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:50:22,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:22,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:22,615 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) [2021-08-21 18:50:22,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 18:50:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:24,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:50:25,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:25,605 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:50:25,606 INFO L388 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 34 treesize of output 25 [2021-08-21 18:50:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:25,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077953615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:25,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:25,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:50:25,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147498079] [2021-08-21 18:50:25,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:50:25,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:25,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:50:25,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:50:25,662 INFO L87 Difference]: Start difference. First operand 8589 states and 19852 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:50:27,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:27,037 INFO L93 Difference]: Finished difference Result 10320 states and 23712 transitions. [2021-08-21 18:50:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:50:27,037 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-21 18:50:27,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:27,054 INFO L225 Difference]: With dead ends: 10320 [2021-08-21 18:50:27,054 INFO L226 Difference]: Without dead ends: 10315 [2021-08-21 18:50:27,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1126.8ms TimeCoverageRelationStatistics Valid=331, Invalid=1475, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:50:27,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10315 states. [2021-08-21 18:50:27,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10315 to 8595. [2021-08-21 18:50:27,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8595 states, 8594 states have (on average 2.3106818710728416) internal successors, (19858), 8594 states have internal predecessors, (19858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:27,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8595 states to 8595 states and 19858 transitions. [2021-08-21 18:50:27,192 INFO L78 Accepts]: Start accepts. Automaton has 8595 states and 19858 transitions. Word has length 30 [2021-08-21 18:50:27,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:27,192 INFO L470 AbstractCegarLoop]: Abstraction has 8595 states and 19858 transitions. [2021-08-21 18:50:27,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:50:27,192 INFO L276 IsEmpty]: Start isEmpty. Operand 8595 states and 19858 transitions. [2021-08-21 18:50:27,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:50:27,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:27,201 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:27,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:27,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 18:50:27,402 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:50:27,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:27,402 INFO L82 PathProgramCache]: Analyzing trace with hash -253359538, now seen corresponding path program 74 times [2021-08-21 18:50:27,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:27,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963645380] [2021-08-21 18:50:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:27,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:27,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:27,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963645380] [2021-08-21 18:50:27,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963645380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:27,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498730885] [2021-08-21 18:50:27,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:27,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:27,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:27,687 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) [2021-08-21 18:50:27,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 18:50:30,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:30,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:30,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:50:30,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:30,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:50:30,665 INFO L388 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 43 treesize of output 71 [2021-08-21 18:50:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:31,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498730885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:31,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:31,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-21 18:50:31,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094925009] [2021-08-21 18:50:31,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:50:31,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:31,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:50:31,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:50:31,087 INFO L87 Difference]: Start difference. First operand 8595 states and 19858 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) [2021-08-21 18:50:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:37,594 INFO L93 Difference]: Finished difference Result 10339 states and 23752 transitions. [2021-08-21 18:50:37,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:50:37,594 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 30 [2021-08-21 18:50:37,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:37,612 INFO L225 Difference]: With dead ends: 10339 [2021-08-21 18:50:37,612 INFO L226 Difference]: Without dead ends: 10329 [2021-08-21 18:50:37,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 2653.4ms TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:50:37,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10329 states. [2021-08-21 18:50:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10329 to 8625. [2021-08-21 18:50:37,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8625 states, 8624 states have (on average 2.309601113172542) internal successors, (19918), 8624 states have internal predecessors, (19918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:37,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8625 states to 8625 states and 19918 transitions. [2021-08-21 18:50:37,758 INFO L78 Accepts]: Start accepts. Automaton has 8625 states and 19918 transitions. Word has length 30 [2021-08-21 18:50:37,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:37,758 INFO L470 AbstractCegarLoop]: Abstraction has 8625 states and 19918 transitions. [2021-08-21 18:50:37,758 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) [2021-08-21 18:50:37,758 INFO L276 IsEmpty]: Start isEmpty. Operand 8625 states and 19918 transitions. [2021-08-21 18:50:37,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:50:37,769 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:37,770 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:37,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 18:50:37,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 18:50:37,970 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:50:37,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:37,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1854210510, now seen corresponding path program 75 times [2021-08-21 18:50:37,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:37,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535092787] [2021-08-21 18:50:37,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:37,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:38,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:38,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535092787] [2021-08-21 18:50:38,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535092787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:38,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049618963] [2021-08-21 18:50:38,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:38,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:38,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:38,408 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) [2021-08-21 18:50:38,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 18:50:40,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:50:40,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:40,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:50:40,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:41,495 INFO L354 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2021-08-21 18:50:41,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 61 [2021-08-21 18:50:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:41,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049618963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:41,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:41,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:50:41,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325162095] [2021-08-21 18:50:41,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:50:41,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:41,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:50:41,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:50:41,635 INFO L87 Difference]: Start difference. First operand 8625 states and 19918 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-08-21 18:50:45,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:45,210 INFO L93 Difference]: Finished difference Result 9453 states and 21322 transitions. [2021-08-21 18:50:45,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:50:45,210 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:50:45,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:45,226 INFO L225 Difference]: With dead ends: 9453 [2021-08-21 18:50:45,226 INFO L226 Difference]: Without dead ends: 9443 [2021-08-21 18:50:45,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 3237.0ms TimeCoverageRelationStatistics Valid=445, Invalid=3215, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:50:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9443 states. [2021-08-21 18:50:45,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9443 to 8646. [2021-08-21 18:50:45,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8646 states, 8645 states have (on average 2.3090803932909196) internal successors, (19962), 8645 states have internal predecessors, (19962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:45,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8646 states to 8646 states and 19962 transitions. [2021-08-21 18:50:45,392 INFO L78 Accepts]: Start accepts. Automaton has 8646 states and 19962 transitions. Word has length 30 [2021-08-21 18:50:45,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:45,392 INFO L470 AbstractCegarLoop]: Abstraction has 8646 states and 19962 transitions. [2021-08-21 18:50:45,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-08-21 18:50:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 8646 states and 19962 transitions. [2021-08-21 18:50:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:50:45,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:45,404 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:45,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-21 18:50:45,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-21 18:50:45,605 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:50:45,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:45,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2107999634, now seen corresponding path program 76 times [2021-08-21 18:50:45,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:45,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080276073] [2021-08-21 18:50:45,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:45,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:45,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:45,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080276073] [2021-08-21 18:50:45,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080276073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:45,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113190622] [2021-08-21 18:50:45,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:50:45,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:45,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:45,966 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) [2021-08-21 18:50:45,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 18:50:48,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:50:48,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:48,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:50:48,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:49,114 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:50:49,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-21 18:50:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:49,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113190622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:49,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:49,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:50:49,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731943528] [2021-08-21 18:50:49,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:50:49,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:49,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:50:49,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:50:49,190 INFO L87 Difference]: Start difference. First operand 8646 states and 19962 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) [2021-08-21 18:50:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:52,387 INFO L93 Difference]: Finished difference Result 11139 states and 25586 transitions. [2021-08-21 18:50:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 18:50:52,388 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 30 [2021-08-21 18:50:52,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:52,408 INFO L225 Difference]: With dead ends: 11139 [2021-08-21 18:50:52,408 INFO L226 Difference]: Without dead ends: 11134 [2021-08-21 18:50:52,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 2904.1ms TimeCoverageRelationStatistics Valid=480, Invalid=3552, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 18:50:52,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11134 states. [2021-08-21 18:50:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11134 to 8672. [2021-08-21 18:50:52,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8672 states, 8671 states have (on average 2.3076923076923075) internal successors, (20010), 8671 states have internal predecessors, (20010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:52,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8672 states to 8672 states and 20010 transitions. [2021-08-21 18:50:52,557 INFO L78 Accepts]: Start accepts. Automaton has 8672 states and 20010 transitions. Word has length 30 [2021-08-21 18:50:52,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:52,557 INFO L470 AbstractCegarLoop]: Abstraction has 8672 states and 20010 transitions. [2021-08-21 18:50:52,557 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) [2021-08-21 18:50:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 8672 states and 20010 transitions. [2021-08-21 18:50:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:50:52,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:52,606 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:52,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 18:50:52,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:52,807 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:50:52,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:52,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1009936758, now seen corresponding path program 28 times [2021-08-21 18:50:52,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:52,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328473015] [2021-08-21 18:50:52,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:52,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:53,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:53,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328473015] [2021-08-21 18:50:53,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328473015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:53,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336749254] [2021-08-21 18:50:53,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:50:53,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:53,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:53,439 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) [2021-08-21 18:50:53,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 18:50:55,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:50:55,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:55,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:50:55,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:56,634 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-21 18:50:56,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 35 treesize of output 28 [2021-08-21 18:50:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:56,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336749254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:56,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:56,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-08-21 18:50:56,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688636296] [2021-08-21 18:50:56,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:50:56,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:56,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:50:56,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:50:56,693 INFO L87 Difference]: Start difference. First operand 8672 states and 20010 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-08-21 18:50:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:59,505 INFO L93 Difference]: Finished difference Result 8721 states and 20073 transitions. [2021-08-21 18:50:59,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:50:59,506 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:50:59,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:59,518 INFO L225 Difference]: With dead ends: 8721 [2021-08-21 18:50:59,518 INFO L226 Difference]: Without dead ends: 8716 [2021-08-21 18:50:59,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 2817.3ms TimeCoverageRelationStatistics Valid=389, Invalid=2367, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:50:59,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8716 states. [2021-08-21 18:50:59,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8716 to 8676. [2021-08-21 18:50:59,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8676 states, 8675 states have (on average 2.3072046109510085) internal successors, (20015), 8675 states have internal predecessors, (20015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 20015 transitions. [2021-08-21 18:50:59,631 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 20015 transitions. Word has length 30 [2021-08-21 18:50:59,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:59,631 INFO L470 AbstractCegarLoop]: Abstraction has 8676 states and 20015 transitions. [2021-08-21 18:50:59,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-08-21 18:50:59,631 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 20015 transitions. [2021-08-21 18:50:59,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:50:59,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:59,682 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:59,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-21 18:50:59,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:59,882 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:50:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:59,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1805963638, now seen corresponding path program 29 times [2021-08-21 18:50:59,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:59,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775066113] [2021-08-21 18:50:59,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:59,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:00,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:00,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775066113] [2021-08-21 18:51:00,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775066113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:00,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19244798] [2021-08-21 18:51:00,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:51:00,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:00,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:00,414 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) [2021-08-21 18:51:00,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 18:51:02,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:51:02,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:02,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:51:02,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:03,639 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-21 18:51:03,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 35 treesize of output 28 [2021-08-21 18:51:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:03,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19244798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:03,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:03,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-08-21 18:51:03,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985957916] [2021-08-21 18:51:03,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:51:03,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:03,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:51:03,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:51:03,702 INFO L87 Difference]: Start difference. First operand 8676 states and 20015 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-08-21 18:51:07,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:07,601 INFO L93 Difference]: Finished difference Result 8761 states and 20133 transitions. [2021-08-21 18:51:07,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:51:07,602 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:51:07,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:07,613 INFO L225 Difference]: With dead ends: 8761 [2021-08-21 18:51:07,614 INFO L226 Difference]: Without dead ends: 8756 [2021-08-21 18:51:07,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 3619.7ms TimeCoverageRelationStatistics Valid=538, Invalid=3244, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:51:07,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8756 states. [2021-08-21 18:51:07,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8756 to 8676. [2021-08-21 18:51:07,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8676 states, 8675 states have (on average 2.3072046109510085) internal successors, (20015), 8675 states have internal predecessors, (20015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:07,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 20015 transitions. [2021-08-21 18:51:07,728 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 20015 transitions. Word has length 30 [2021-08-21 18:51:07,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:07,728 INFO L470 AbstractCegarLoop]: Abstraction has 8676 states and 20015 transitions. [2021-08-21 18:51:07,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-08-21 18:51:07,728 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 20015 transitions. [2021-08-21 18:51:07,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:51:07,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:07,739 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:07,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-21 18:51:07,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-21 18:51:07,940 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:51:07,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:07,940 INFO L82 PathProgramCache]: Analyzing trace with hash -613497206, now seen corresponding path program 30 times [2021-08-21 18:51:07,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:07,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302084016] [2021-08-21 18:51:07,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:07,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:08,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:08,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302084016] [2021-08-21 18:51:08,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302084016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:08,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399697554] [2021-08-21 18:51:08,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:51:08,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:08,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:08,489 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) [2021-08-21 18:51:08,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 18:51:11,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:51:11,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:11,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:51:11,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:11,711 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-21 18:51:11,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 35 treesize of output 28 [2021-08-21 18:51:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:11,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399697554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:11,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:11,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-21 18:51:11,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044919698] [2021-08-21 18:51:11,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:51:11,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:11,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:51:11,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:51:11,765 INFO L87 Difference]: Start difference. First operand 8676 states and 20015 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:16,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:16,237 INFO L93 Difference]: Finished difference Result 8823 states and 20227 transitions. [2021-08-21 18:51:16,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:51:16,237 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:51:16,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:16,253 INFO L225 Difference]: With dead ends: 8823 [2021-08-21 18:51:16,254 INFO L226 Difference]: Without dead ends: 8818 [2021-08-21 18:51:16,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 4166.3ms TimeCoverageRelationStatistics Valid=630, Invalid=3792, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 18:51:16,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8818 states. [2021-08-21 18:51:16,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8818 to 8675. [2021-08-21 18:51:16,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8675 states, 8674 states have (on average 2.3068941664745215) internal successors, (20010), 8674 states have internal predecessors, (20010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:16,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8675 states to 8675 states and 20010 transitions. [2021-08-21 18:51:16,387 INFO L78 Accepts]: Start accepts. Automaton has 8675 states and 20010 transitions. Word has length 30 [2021-08-21 18:51:16,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:16,387 INFO L470 AbstractCegarLoop]: Abstraction has 8675 states and 20010 transitions. [2021-08-21 18:51:16,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:16,387 INFO L276 IsEmpty]: Start isEmpty. Operand 8675 states and 20010 transitions. [2021-08-21 18:51:16,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:51:16,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:16,398 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:16,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-21 18:51:16,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:16,598 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:51:16,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:16,599 INFO L82 PathProgramCache]: Analyzing trace with hash -146874486, now seen corresponding path program 77 times [2021-08-21 18:51:16,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:16,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748462903] [2021-08-21 18:51:16,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:16,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:16,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:16,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748462903] [2021-08-21 18:51:16,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748462903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:16,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656653054] [2021-08-21 18:51:16,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:51:16,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:16,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:16,949 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) [2021-08-21 18:51:16,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 18:51:19,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:51:19,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:19,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:51:19,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:20,268 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:51:20,268 INFO L388 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 36 treesize of output 27 [2021-08-21 18:51:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:20,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656653054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:20,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:20,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:51:20,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675792288] [2021-08-21 18:51:20,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:51:20,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:20,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:51:20,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:51:20,317 INFO L87 Difference]: Start difference. First operand 8675 states and 20010 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) [2021-08-21 18:51:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:22,914 INFO L93 Difference]: Finished difference Result 10501 states and 24064 transitions. [2021-08-21 18:51:22,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:51:22,915 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 30 [2021-08-21 18:51:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:22,933 INFO L225 Difference]: With dead ends: 10501 [2021-08-21 18:51:22,933 INFO L226 Difference]: Without dead ends: 10491 [2021-08-21 18:51:22,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 2002.4ms TimeCoverageRelationStatistics Valid=373, Invalid=2077, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:51:22,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10491 states. [2021-08-21 18:51:23,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10491 to 8690. [2021-08-21 18:51:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8690 states, 8689 states have (on average 2.307285073080907) internal successors, (20048), 8689 states have internal predecessors, (20048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8690 states to 8690 states and 20048 transitions. [2021-08-21 18:51:23,080 INFO L78 Accepts]: Start accepts. Automaton has 8690 states and 20048 transitions. Word has length 30 [2021-08-21 18:51:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:23,080 INFO L470 AbstractCegarLoop]: Abstraction has 8690 states and 20048 transitions. [2021-08-21 18:51:23,080 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) [2021-08-21 18:51:23,080 INFO L276 IsEmpty]: Start isEmpty. Operand 8690 states and 20048 transitions. [2021-08-21 18:51:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:51:23,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:23,091 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:23,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-21 18:51:23,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:23,292 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:51:23,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:23,292 INFO L82 PathProgramCache]: Analyzing trace with hash 106914638, now seen corresponding path program 78 times [2021-08-21 18:51:23,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:23,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42903305] [2021-08-21 18:51:23,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:23,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:23,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:23,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42903305] [2021-08-21 18:51:23,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42903305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:23,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102576928] [2021-08-21 18:51:23,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:51:23,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:23,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:23,643 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) [2021-08-21 18:51:23,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 18:51:26,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:51:26,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:26,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:51:26,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:27,028 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:51:27,028 INFO L388 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 34 treesize of output 25 [2021-08-21 18:51:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:27,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102576928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:27,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:27,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:51:27,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431768906] [2021-08-21 18:51:27,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:51:27,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:27,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:51:27,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:51:27,093 INFO L87 Difference]: Start difference. First operand 8690 states and 20048 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:51:28,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:28,887 INFO L93 Difference]: Finished difference Result 10590 states and 24261 transitions. [2021-08-21 18:51:28,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:51:28,887 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-21 18:51:28,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:28,905 INFO L225 Difference]: With dead ends: 10590 [2021-08-21 18:51:28,905 INFO L226 Difference]: Without dead ends: 10585 [2021-08-21 18:51:28,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1449.7ms TimeCoverageRelationStatistics Valid=373, Invalid=1607, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:51:28,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10585 states. [2021-08-21 18:51:29,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10585 to 8739. [2021-08-21 18:51:29,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8739 states, 8738 states have (on average 2.3081940947585258) internal successors, (20169), 8738 states have internal predecessors, (20169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8739 states to 8739 states and 20169 transitions. [2021-08-21 18:51:29,047 INFO L78 Accepts]: Start accepts. Automaton has 8739 states and 20169 transitions. Word has length 30 [2021-08-21 18:51:29,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:29,047 INFO L470 AbstractCegarLoop]: Abstraction has 8739 states and 20169 transitions. [2021-08-21 18:51:29,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:51:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 8739 states and 20169 transitions. [2021-08-21 18:51:29,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:51:29,058 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:29,058 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:29,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 18:51:29,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:29,259 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:51:29,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:29,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1383241610, now seen corresponding path program 79 times [2021-08-21 18:51:29,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:29,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712889047] [2021-08-21 18:51:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:29,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:29,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:29,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712889047] [2021-08-21 18:51:29,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712889047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:29,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402044351] [2021-08-21 18:51:29,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:51:29,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:29,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:29,623 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) [2021-08-21 18:51:29,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 18:51:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:32,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:51:32,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:33,051 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:51:33,051 INFO L388 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 34 treesize of output 25 [2021-08-21 18:51:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:33,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402044351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:33,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:33,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:51:33,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574059871] [2021-08-21 18:51:33,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:51:33,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:33,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:51:33,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:51:33,111 INFO L87 Difference]: Start difference. First operand 8739 states and 20169 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:51:35,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:35,061 INFO L93 Difference]: Finished difference Result 10667 states and 24377 transitions. [2021-08-21 18:51:35,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:51:35,062 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-21 18:51:35,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:35,081 INFO L225 Difference]: With dead ends: 10667 [2021-08-21 18:51:35,081 INFO L226 Difference]: Without dead ends: 10662 [2021-08-21 18:51:35,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1569.5ms TimeCoverageRelationStatistics Valid=470, Invalid=1980, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:51:35,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10662 states. [2021-08-21 18:51:35,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10662 to 8749. [2021-08-21 18:51:35,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8749 states, 8748 states have (on average 2.30761316872428) internal successors, (20187), 8748 states have internal predecessors, (20187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:35,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8749 states to 8749 states and 20187 transitions. [2021-08-21 18:51:35,224 INFO L78 Accepts]: Start accepts. Automaton has 8749 states and 20187 transitions. Word has length 30 [2021-08-21 18:51:35,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:35,224 INFO L470 AbstractCegarLoop]: Abstraction has 8749 states and 20187 transitions. [2021-08-21 18:51:35,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:51:35,224 INFO L276 IsEmpty]: Start isEmpty. Operand 8749 states and 20187 transitions. [2021-08-21 18:51:35,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:51:35,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:35,235 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:35,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 18:51:35,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 18:51:35,436 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:51:35,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:35,436 INFO L82 PathProgramCache]: Analyzing trace with hash -804155638, now seen corresponding path program 80 times [2021-08-21 18:51:35,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:35,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820137154] [2021-08-21 18:51:35,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:35,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:35,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:35,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820137154] [2021-08-21 18:51:35,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820137154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:35,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695186569] [2021-08-21 18:51:35,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:35,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:35,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:35,976 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) [2021-08-21 18:51:35,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 18:51:38,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:38,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:38,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 18:51:38,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:39,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:51:39,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:51:39,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:51:39,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 18:51:39,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:51:39,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 18:51:39,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-08-21 18:51:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:39,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695186569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:39,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:39,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-21 18:51:39,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653803197] [2021-08-21 18:51:39,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:51:39,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:39,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:51:39,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:51:39,538 INFO L87 Difference]: Start difference. First operand 8749 states and 20187 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) [2021-08-21 18:51:42,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:42,189 INFO L93 Difference]: Finished difference Result 9610 states and 21661 transitions. [2021-08-21 18:51:42,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 18:51:42,190 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 30 [2021-08-21 18:51:42,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:42,206 INFO L225 Difference]: With dead ends: 9610 [2021-08-21 18:51:42,206 INFO L226 Difference]: Without dead ends: 9600 [2021-08-21 18:51:42,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 2437.7ms TimeCoverageRelationStatistics Valid=397, Invalid=2465, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:51:42,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9600 states. [2021-08-21 18:51:42,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9600 to 8751. [2021-08-21 18:51:42,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8751 states, 8750 states have (on average 2.3077714285714284) internal successors, (20193), 8750 states have internal predecessors, (20193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:42,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8751 states to 8751 states and 20193 transitions. [2021-08-21 18:51:42,342 INFO L78 Accepts]: Start accepts. Automaton has 8751 states and 20193 transitions. Word has length 30 [2021-08-21 18:51:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:42,342 INFO L470 AbstractCegarLoop]: Abstraction has 8751 states and 20193 transitions. [2021-08-21 18:51:42,342 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) [2021-08-21 18:51:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 8751 states and 20193 transitions. [2021-08-21 18:51:42,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:51:42,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:42,353 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:42,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:42,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 18:51:42,555 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:51:42,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:42,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1999316746, now seen corresponding path program 81 times [2021-08-21 18:51:42,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:42,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391825008] [2021-08-21 18:51:42,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:42,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:43,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:43,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391825008] [2021-08-21 18:51:43,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391825008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:43,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643918730] [2021-08-21 18:51:43,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:51:43,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:43,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:43,046 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) [2021-08-21 18:51:43,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 18:51:45,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:51:45,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:45,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:51:45,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:46,492 INFO L354 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2021-08-21 18:51:46,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 61 [2021-08-21 18:51:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:46,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643918730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:46,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:46,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:51:46,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886188684] [2021-08-21 18:51:46,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:51:46,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:46,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:51:46,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:51:46,660 INFO L87 Difference]: Start difference. First operand 8751 states and 20193 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) [2021-08-21 18:51:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:48,564 INFO L93 Difference]: Finished difference Result 12336 states and 28186 transitions. [2021-08-21 18:51:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:51:48,572 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 30 [2021-08-21 18:51:48,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:48,609 INFO L225 Difference]: With dead ends: 12336 [2021-08-21 18:51:48,610 INFO L226 Difference]: Without dead ends: 12326 [2021-08-21 18:51:48,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1695.1ms TimeCoverageRelationStatistics Valid=259, Invalid=1997, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:51:48,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12326 states. [2021-08-21 18:51:48,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12326 to 8759. [2021-08-21 18:51:48,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8759 states, 8758 states have (on average 2.3078328385476135) internal successors, (20212), 8758 states have internal predecessors, (20212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:48,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8759 states to 8759 states and 20212 transitions. [2021-08-21 18:51:48,793 INFO L78 Accepts]: Start accepts. Automaton has 8759 states and 20212 transitions. Word has length 30 [2021-08-21 18:51:48,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:48,793 INFO L470 AbstractCegarLoop]: Abstraction has 8759 states and 20212 transitions. [2021-08-21 18:51:48,793 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) [2021-08-21 18:51:48,794 INFO L276 IsEmpty]: Start isEmpty. Operand 8759 states and 20212 transitions. [2021-08-21 18:51:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:51:48,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:48,806 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:48,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-21 18:51:49,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 18:51:49,019 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:51:49,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:49,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1860571018, now seen corresponding path program 82 times [2021-08-21 18:51:49,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:49,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719698787] [2021-08-21 18:51:49,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:49,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:49,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:49,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719698787] [2021-08-21 18:51:49,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719698787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:49,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288921125] [2021-08-21 18:51:49,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:51:49,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:49,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:49,376 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) [2021-08-21 18:51:49,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 18:51:52,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:51:52,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:52,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:51:52,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:53,101 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:51:53,101 INFO L388 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 34 treesize of output 25 [2021-08-21 18:51:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:53,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288921125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:53,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:53,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:51:53,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570928032] [2021-08-21 18:51:53,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:51:53,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:53,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:51:53,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:51:53,166 INFO L87 Difference]: Start difference. First operand 8759 states and 20212 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:51:55,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:55,517 INFO L93 Difference]: Finished difference Result 13296 states and 30045 transitions. [2021-08-21 18:51:55,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:51:55,518 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-21 18:51:55,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:55,539 INFO L225 Difference]: With dead ends: 13296 [2021-08-21 18:51:55,539 INFO L226 Difference]: Without dead ends: 13286 [2021-08-21 18:51:55,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1857.7ms TimeCoverageRelationStatistics Valid=597, Invalid=2595, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 18:51:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13286 states. [2021-08-21 18:51:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13286 to 8769. [2021-08-21 18:51:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8769 states, 8768 states have (on average 2.3079379562043796) internal successors, (20236), 8768 states have internal predecessors, (20236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8769 states to 8769 states and 20236 transitions. [2021-08-21 18:51:55,692 INFO L78 Accepts]: Start accepts. Automaton has 8769 states and 20236 transitions. Word has length 30 [2021-08-21 18:51:55,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:55,692 INFO L470 AbstractCegarLoop]: Abstraction has 8769 states and 20236 transitions. [2021-08-21 18:51:55,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:51:55,692 INFO L276 IsEmpty]: Start isEmpty. Operand 8769 states and 20236 transitions. [2021-08-21 18:51:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:51:55,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:55,702 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:55,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-21 18:51:55,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-21 18:51:55,904 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:51:55,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:55,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1779681162, now seen corresponding path program 83 times [2021-08-21 18:51:55,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:55,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842650370] [2021-08-21 18:51:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:55,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:56,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:56,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842650370] [2021-08-21 18:51:56,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842650370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:56,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897571821] [2021-08-21 18:51:56,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:51:56,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:56,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:56,237 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) [2021-08-21 18:51:56,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 18:51:59,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:51:59,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:59,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:51:59,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:59,854 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-08-21 18:51:59,854 INFO L388 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 39 treesize of output 51 [2021-08-21 18:52:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:00,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897571821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:00,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:00,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:52:00,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767780667] [2021-08-21 18:52:00,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:52:00,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:00,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:52:00,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:52:00,053 INFO L87 Difference]: Start difference. First operand 8769 states and 20236 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-08-21 18:52:04,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:04,854 INFO L93 Difference]: Finished difference Result 14259 states and 32138 transitions. [2021-08-21 18:52:04,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 18:52:04,854 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 30 [2021-08-21 18:52:04,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:04,878 INFO L225 Difference]: With dead ends: 14259 [2021-08-21 18:52:04,878 INFO L226 Difference]: Without dead ends: 14249 [2021-08-21 18:52:04,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1966 ImplicationChecksByTransitivity, 3928.4ms TimeCoverageRelationStatistics Valid=1043, Invalid=5119, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 18:52:04,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14249 states. [2021-08-21 18:52:05,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14249 to 8773. [2021-08-21 18:52:05,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8773 states, 8772 states have (on average 2.308025535795714) internal successors, (20246), 8772 states have internal predecessors, (20246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:05,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8773 states to 8773 states and 20246 transitions. [2021-08-21 18:52:05,039 INFO L78 Accepts]: Start accepts. Automaton has 8773 states and 20246 transitions. Word has length 30 [2021-08-21 18:52:05,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:05,039 INFO L470 AbstractCegarLoop]: Abstraction has 8773 states and 20246 transitions. [2021-08-21 18:52:05,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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) [2021-08-21 18:52:05,039 INFO L276 IsEmpty]: Start isEmpty. Operand 8773 states and 20246 transitions. [2021-08-21 18:52:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:52:05,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:05,050 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:05,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 18:52:05,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:05,250 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:52:05,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:05,250 INFO L82 PathProgramCache]: Analyzing trace with hash -334572978, now seen corresponding path program 84 times [2021-08-21 18:52:05,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:05,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669045158] [2021-08-21 18:52:05,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:05,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:05,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:05,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669045158] [2021-08-21 18:52:05,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669045158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:05,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947730595] [2021-08-21 18:52:05,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:52:05,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:05,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:05,563 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) [2021-08-21 18:52:05,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 18:52:08,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:52:08,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:08,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 18:52:08,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:09,379 INFO L354 Elim1Store]: treesize reduction 8, result has 86.0 percent of original size [2021-08-21 18:52:09,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 69 [2021-08-21 18:52:09,946 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:09,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947730595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:09,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:09,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-08-21 18:52:09,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002630190] [2021-08-21 18:52:09,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:52:09,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:09,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:52:09,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:52:09,947 INFO L87 Difference]: Start difference. First operand 8773 states and 20246 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) [2021-08-21 18:52:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:14,515 INFO L93 Difference]: Finished difference Result 14163 states and 32092 transitions. [2021-08-21 18:52:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-21 18:52:14,515 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 30 [2021-08-21 18:52:14,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:14,543 INFO L225 Difference]: With dead ends: 14163 [2021-08-21 18:52:14,543 INFO L226 Difference]: Without dead ends: 14153 [2021-08-21 18:52:14,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 3687.0ms TimeCoverageRelationStatistics Valid=1043, Invalid=5763, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 18:52:14,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14153 states. [2021-08-21 18:52:14,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14153 to 8782. [2021-08-21 18:52:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8782 states, 8781 states have (on average 2.308507003758114) internal successors, (20271), 8781 states have internal predecessors, (20271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:14,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8782 states to 8782 states and 20271 transitions. [2021-08-21 18:52:14,720 INFO L78 Accepts]: Start accepts. Automaton has 8782 states and 20271 transitions. Word has length 30 [2021-08-21 18:52:14,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:14,720 INFO L470 AbstractCegarLoop]: Abstraction has 8782 states and 20271 transitions. [2021-08-21 18:52:14,720 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) [2021-08-21 18:52:14,720 INFO L276 IsEmpty]: Start isEmpty. Operand 8782 states and 20271 transitions. [2021-08-21 18:52:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:52:14,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:14,731 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:14,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-21 18:52:14,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:14,932 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:52:14,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:14,932 INFO L82 PathProgramCache]: Analyzing trace with hash 957501322, now seen corresponding path program 85 times [2021-08-21 18:52:14,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:14,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802250535] [2021-08-21 18:52:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:14,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:15,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:15,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802250535] [2021-08-21 18:52:15,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802250535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:15,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126689833] [2021-08-21 18:52:15,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:52:15,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:15,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:15,297 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) [2021-08-21 18:52:15,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 18:52:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:18,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:52:18,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:19,053 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:52:19,053 INFO L388 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 34 treesize of output 25 [2021-08-21 18:52:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:19,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126689833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:19,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:19,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:52:19,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415078126] [2021-08-21 18:52:19,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:52:19,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:19,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:52:19,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:52:19,133 INFO L87 Difference]: Start difference. First operand 8782 states and 20271 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:52:21,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:21,595 INFO L93 Difference]: Finished difference Result 11665 states and 26559 transitions. [2021-08-21 18:52:21,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:52:21,595 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-21 18:52:21,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:21,612 INFO L225 Difference]: With dead ends: 11665 [2021-08-21 18:52:21,613 INFO L226 Difference]: Without dead ends: 11660 [2021-08-21 18:52:21,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1753.2ms TimeCoverageRelationStatistics Valid=591, Invalid=2165, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:52:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11660 states. [2021-08-21 18:52:21,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11660 to 8793. [2021-08-21 18:52:21,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8793 states, 8792 states have (on average 2.3085759781619655) internal successors, (20297), 8792 states have internal predecessors, (20297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:21,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8793 states to 8793 states and 20297 transitions. [2021-08-21 18:52:21,756 INFO L78 Accepts]: Start accepts. Automaton has 8793 states and 20297 transitions. Word has length 30 [2021-08-21 18:52:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:21,756 INFO L470 AbstractCegarLoop]: Abstraction has 8793 states and 20297 transitions. [2021-08-21 18:52:21,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:52:21,757 INFO L276 IsEmpty]: Start isEmpty. Operand 8793 states and 20297 transitions. [2021-08-21 18:52:21,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:52:21,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:21,766 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:21,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-21 18:52:21,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-21 18:52:21,967 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:52:21,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:21,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1573576458, now seen corresponding path program 86 times [2021-08-21 18:52:21,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:21,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096000514] [2021-08-21 18:52:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:21,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:22,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:22,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096000514] [2021-08-21 18:52:22,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096000514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:22,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926046349] [2021-08-21 18:52:22,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:22,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:22,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:22,268 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) [2021-08-21 18:52:22,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 18:52:25,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:25,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:25,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:52:25,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:26,050 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:52:26,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-21 18:52:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:26,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926046349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:26,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:26,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:52:26,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725248787] [2021-08-21 18:52:26,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:52:26,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:26,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:52:26,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:52:26,123 INFO L87 Difference]: Start difference. First operand 8793 states and 20297 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) [2021-08-21 18:52:31,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:31,049 INFO L93 Difference]: Finished difference Result 13483 states and 30624 transitions. [2021-08-21 18:52:31,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 18:52:31,050 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 30 [2021-08-21 18:52:31,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:31,075 INFO L225 Difference]: With dead ends: 13483 [2021-08-21 18:52:31,076 INFO L226 Difference]: Without dead ends: 13468 [2021-08-21 18:52:31,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 4265.4ms TimeCoverageRelationStatistics Valid=744, Invalid=5108, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 18:52:31,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13468 states. [2021-08-21 18:52:31,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13468 to 8812. [2021-08-21 18:52:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8812 states, 8811 states have (on average 2.309612983770287) internal successors, (20350), 8811 states have internal predecessors, (20350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:31,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8812 states to 8812 states and 20350 transitions. [2021-08-21 18:52:31,245 INFO L78 Accepts]: Start accepts. Automaton has 8812 states and 20350 transitions. Word has length 30 [2021-08-21 18:52:31,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:31,245 INFO L470 AbstractCegarLoop]: Abstraction has 8812 states and 20350 transitions. [2021-08-21 18:52:31,245 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) [2021-08-21 18:52:31,245 INFO L276 IsEmpty]: Start isEmpty. Operand 8812 states and 20350 transitions. [2021-08-21 18:52:31,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:52:31,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:31,256 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:31,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:31,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:31,457 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:52:31,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:31,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2144999542, now seen corresponding path program 87 times [2021-08-21 18:52:31,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:31,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499648313] [2021-08-21 18:52:31,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:31,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:31,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:31,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499648313] [2021-08-21 18:52:31,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499648313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:31,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105195123] [2021-08-21 18:52:31,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:31,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:31,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:31,775 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) [2021-08-21 18:52:31,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 18:52:34,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:52:34,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:34,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:52:34,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:35,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:52:35,547 INFO L388 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 43 treesize of output 71 [2021-08-21 18:52:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:37,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105195123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:37,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:37,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-21 18:52:37,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246644615] [2021-08-21 18:52:37,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:52:37,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:37,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:52:37,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:52:37,042 INFO L87 Difference]: Start difference. First operand 8812 states and 20350 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) [2021-08-21 18:52:42,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:42,701 INFO L93 Difference]: Finished difference Result 14650 states and 32973 transitions. [2021-08-21 18:52:42,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 18:52:42,701 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 30 [2021-08-21 18:52:42,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:42,731 INFO L225 Difference]: With dead ends: 14650 [2021-08-21 18:52:42,731 INFO L226 Difference]: Without dead ends: 14645 [2021-08-21 18:52:42,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 4869.0ms TimeCoverageRelationStatistics Valid=951, Invalid=4305, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 18:52:42,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14645 states. [2021-08-21 18:52:42,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14645 to 8810. [2021-08-21 18:52:42,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8810 states, 8809 states have (on average 2.309456237938472) internal successors, (20344), 8809 states have internal predecessors, (20344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8810 states to 8810 states and 20344 transitions. [2021-08-21 18:52:42,893 INFO L78 Accepts]: Start accepts. Automaton has 8810 states and 20344 transitions. Word has length 30 [2021-08-21 18:52:42,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:42,893 INFO L470 AbstractCegarLoop]: Abstraction has 8810 states and 20344 transitions. [2021-08-21 18:52:42,893 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) [2021-08-21 18:52:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 8810 states and 20344 transitions. [2021-08-21 18:52:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:52:42,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:42,939 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:42,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-21 18:52:43,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:43,139 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:52:43,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:43,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1492686602, now seen corresponding path program 88 times [2021-08-21 18:52:43,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:43,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802402726] [2021-08-21 18:52:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:43,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:43,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:43,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802402726] [2021-08-21 18:52:43,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802402726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:43,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181861938] [2021-08-21 18:52:43,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:52:43,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:43,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:43,436 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) [2021-08-21 18:52:43,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 18:52:46,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:52:46,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:46,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:52:46,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:47,304 INFO L354 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2021-08-21 18:52:47,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 72 [2021-08-21 18:52:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:47,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181861938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:47,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:47,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:52:47,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786705214] [2021-08-21 18:52:47,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:52:47,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:47,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:52:47,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:52:47,859 INFO L87 Difference]: Start difference. First operand 8810 states and 20344 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) [2021-08-21 18:52:53,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:53,547 INFO L93 Difference]: Finished difference Result 14199 states and 32534 transitions. [2021-08-21 18:52:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-21 18:52:53,548 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 30 [2021-08-21 18:52:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:53,577 INFO L225 Difference]: With dead ends: 14199 [2021-08-21 18:52:53,577 INFO L226 Difference]: Without dead ends: 14184 [2021-08-21 18:52:53,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1862 ImplicationChecksByTransitivity, 4896.9ms TimeCoverageRelationStatistics Valid=908, Invalid=5098, Unknown=0, NotChecked=0, Total=6006 [2021-08-21 18:52:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14184 states. [2021-08-21 18:52:53,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14184 to 8814. [2021-08-21 18:52:53,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8814 states, 8813 states have (on average 2.30954272098037) internal successors, (20354), 8813 states have internal predecessors, (20354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:53,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8814 states to 8814 states and 20354 transitions. [2021-08-21 18:52:53,756 INFO L78 Accepts]: Start accepts. Automaton has 8814 states and 20354 transitions. Word has length 30 [2021-08-21 18:52:53,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:53,756 INFO L470 AbstractCegarLoop]: Abstraction has 8814 states and 20354 transitions. [2021-08-21 18:52:53,756 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) [2021-08-21 18:52:53,756 INFO L276 IsEmpty]: Start isEmpty. Operand 8814 states and 20354 transitions. [2021-08-21 18:52:53,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:52:53,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:53,767 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:53,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:53,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:53,968 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:52:53,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:53,969 INFO L82 PathProgramCache]: Analyzing trace with hash 678803790, now seen corresponding path program 89 times [2021-08-21 18:52:53,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:53,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111892584] [2021-08-21 18:52:53,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:53,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:54,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:54,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111892584] [2021-08-21 18:52:54,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111892584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:54,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75561975] [2021-08-21 18:52:54,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:52:54,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:54,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:54,400 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) [2021-08-21 18:52:54,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 18:52:57,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:52:57,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:57,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:52:57,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:58,382 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:52:58,382 INFO L388 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 34 treesize of output 25 [2021-08-21 18:52:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:58,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75561975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:58,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:58,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:52:58,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080243992] [2021-08-21 18:52:58,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:52:58,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:58,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:52:58,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:52:58,443 INFO L87 Difference]: Start difference. First operand 8814 states and 20354 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:53:00,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:00,489 INFO L93 Difference]: Finished difference Result 11342 states and 25738 transitions. [2021-08-21 18:53:00,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:53:00,490 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-21 18:53:00,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:00,507 INFO L225 Difference]: With dead ends: 11342 [2021-08-21 18:53:00,508 INFO L226 Difference]: Without dead ends: 11337 [2021-08-21 18:53:00,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1671.9ms TimeCoverageRelationStatistics Valid=397, Invalid=1325, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:53:00,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11337 states. [2021-08-21 18:53:00,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11337 to 8845. [2021-08-21 18:53:00,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8845 states, 8844 states have (on average 2.3102668475802806) internal successors, (20432), 8844 states have internal predecessors, (20432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:00,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8845 states to 8845 states and 20432 transitions. [2021-08-21 18:53:00,644 INFO L78 Accepts]: Start accepts. Automaton has 8845 states and 20432 transitions. Word has length 30 [2021-08-21 18:53:00,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:00,644 INFO L470 AbstractCegarLoop]: Abstraction has 8845 states and 20432 transitions. [2021-08-21 18:53:00,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:53:00,644 INFO L276 IsEmpty]: Start isEmpty. Operand 8845 states and 20432 transitions. [2021-08-21 18:53:00,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:53:00,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:00,654 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:00,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-21 18:53:00,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:00,854 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:53:00,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:00,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1294878926, now seen corresponding path program 90 times [2021-08-21 18:53:00,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:00,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895486387] [2021-08-21 18:53:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:00,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:53:01,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:01,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895486387] [2021-08-21 18:53:01,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895486387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:01,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377035561] [2021-08-21 18:53:01,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:53:01,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:01,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:01,244 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) [2021-08-21 18:53:01,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 18:53:04,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:53:04,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:04,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:53:04,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:05,297 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:53:05,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-21 18:53:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:53:05,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377035561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:05,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:05,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:53:05,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401567164] [2021-08-21 18:53:05,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:53:05,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:05,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:53:05,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:53:05,369 INFO L87 Difference]: Start difference. First operand 8845 states and 20432 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) [2021-08-21 18:53:09,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:09,497 INFO L93 Difference]: Finished difference Result 13497 states and 30710 transitions. [2021-08-21 18:53:09,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-21 18:53:09,498 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 30 [2021-08-21 18:53:09,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:09,519 INFO L225 Difference]: With dead ends: 13497 [2021-08-21 18:53:09,520 INFO L226 Difference]: Without dead ends: 13482 [2021-08-21 18:53:09,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 3716.9ms TimeCoverageRelationStatistics Valid=688, Invalid=5164, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 18:53:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13482 states. [2021-08-21 18:53:09,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13482 to 8866. [2021-08-21 18:53:09,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8866 states, 8865 states have (on average 2.310547095318669) internal successors, (20483), 8865 states have internal predecessors, (20483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:09,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8866 states to 8866 states and 20483 transitions. [2021-08-21 18:53:09,693 INFO L78 Accepts]: Start accepts. Automaton has 8866 states and 20483 transitions. Word has length 30 [2021-08-21 18:53:09,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:09,693 INFO L470 AbstractCegarLoop]: Abstraction has 8866 states and 20483 transitions. [2021-08-21 18:53:09,693 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) [2021-08-21 18:53:09,693 INFO L276 IsEmpty]: Start isEmpty. Operand 8866 states and 20483 transitions. [2021-08-21 18:53:09,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:53:09,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:09,704 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:09,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:09,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 18:53:09,905 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:53:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:09,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1871270222, now seen corresponding path program 91 times [2021-08-21 18:53:09,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:09,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910611281] [2021-08-21 18:53:09,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:09,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:10,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:53:10,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:10,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910611281] [2021-08-21 18:53:10,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910611281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:10,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51126535] [2021-08-21 18:53:10,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:53:10,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:10,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:10,248 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) [2021-08-21 18:53:10,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 18:53:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:13,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:53:13,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:14,318 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-08-21 18:53:14,318 INFO L388 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 41 treesize of output 53 [2021-08-21 18:53:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:53:14,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51126535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:14,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:14,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:53:14,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463879906] [2021-08-21 18:53:14,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:53:14,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:14,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:53:14,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:53:14,509 INFO L87 Difference]: Start difference. First operand 8866 states and 20483 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-08-21 18:53:16,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:16,985 INFO L93 Difference]: Finished difference Result 15098 states and 34031 transitions. [2021-08-21 18:53:16,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 18:53:16,986 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 30 [2021-08-21 18:53:16,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:17,010 INFO L225 Difference]: With dead ends: 15098 [2021-08-21 18:53:17,010 INFO L226 Difference]: Without dead ends: 15088 [2021-08-21 18:53:17,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 1993.5ms TimeCoverageRelationStatistics Valid=703, Invalid=2603, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 18:53:17,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15088 states. [2021-08-21 18:53:17,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15088 to 8877. [2021-08-21 18:53:17,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8877 states, 8876 states have (on average 2.311063542136097) internal successors, (20513), 8876 states have internal predecessors, (20513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:17,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8877 states to 8877 states and 20513 transitions. [2021-08-21 18:53:17,173 INFO L78 Accepts]: Start accepts. Automaton has 8877 states and 20513 transitions. Word has length 30 [2021-08-21 18:53:17,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:17,174 INFO L470 AbstractCegarLoop]: Abstraction has 8877 states and 20513 transitions. [2021-08-21 18:53:17,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-08-21 18:53:17,174 INFO L276 IsEmpty]: Start isEmpty. Operand 8877 states and 20513 transitions. [2021-08-21 18:53:17,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:53:17,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:17,184 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:17,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-21 18:53:17,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-21 18:53:17,384 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:53:17,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:17,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1213989070, now seen corresponding path program 92 times [2021-08-21 18:53:17,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:17,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444646991] [2021-08-21 18:53:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:17,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:53:17,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:17,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444646991] [2021-08-21 18:53:17,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444646991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:17,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705840761] [2021-08-21 18:53:17,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:17,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:17,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:17,721 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) [2021-08-21 18:53:17,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 18:53:21,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:21,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:21,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:53:21,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:21,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:53:21,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 18:53:21,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:53:21,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:53:21,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:53:21,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:53:21,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2021-08-21 18:53:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:53:21,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705840761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:21,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:21,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-21 18:53:21,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123762115] [2021-08-21 18:53:21,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:53:21,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:21,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:53:21,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:53:21,771 INFO L87 Difference]: Start difference. First operand 8877 states and 20513 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:26,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:26,211 INFO L93 Difference]: Finished difference Result 13684 states and 31307 transitions. [2021-08-21 18:53:26,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 18:53:26,211 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:53:26,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:26,233 INFO L225 Difference]: With dead ends: 13684 [2021-08-21 18:53:26,233 INFO L226 Difference]: Without dead ends: 13674 [2021-08-21 18:53:26,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 3806.6ms TimeCoverageRelationStatistics Valid=669, Invalid=4733, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 18:53:26,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13674 states. [2021-08-21 18:53:26,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13674 to 8877. [2021-08-21 18:53:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8877 states, 8876 states have (on average 2.311063542136097) internal successors, (20513), 8876 states have internal predecessors, (20513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8877 states to 8877 states and 20513 transitions. [2021-08-21 18:53:26,405 INFO L78 Accepts]: Start accepts. Automaton has 8877 states and 20513 transitions. Word has length 30 [2021-08-21 18:53:26,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:26,406 INFO L470 AbstractCegarLoop]: Abstraction has 8877 states and 20513 transitions. [2021-08-21 18:53:26,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:26,406 INFO L276 IsEmpty]: Start isEmpty. Operand 8877 states and 20513 transitions. [2021-08-21 18:53:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:53:26,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:26,416 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:26,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:26,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:26,616 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:53:26,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:26,617 INFO L82 PathProgramCache]: Analyzing trace with hash -900265070, now seen corresponding path program 93 times [2021-08-21 18:53:26,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:26,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321669344] [2021-08-21 18:53:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:26,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:53:26,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:26,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321669344] [2021-08-21 18:53:26,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321669344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:26,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888795107] [2021-08-21 18:53:26,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:26,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:26,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:26,927 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) [2021-08-21 18:53:26,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 18:53:30,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:53:30,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:30,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:53:30,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:31,003 INFO L354 Elim1Store]: treesize reduction 16, result has 75.4 percent of original size [2021-08-21 18:53:31,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 69 [2021-08-21 18:53:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:53:31,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888795107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:31,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:31,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:53:31,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607770707] [2021-08-21 18:53:31,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:53:31,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:31,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:53:31,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:53:31,272 INFO L87 Difference]: Start difference. First operand 8877 states and 20513 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) [2021-08-21 18:53:34,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:34,540 INFO L93 Difference]: Finished difference Result 13421 states and 31067 transitions. [2021-08-21 18:53:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 18:53:34,540 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 30 [2021-08-21 18:53:34,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:34,562 INFO L225 Difference]: With dead ends: 13421 [2021-08-21 18:53:34,562 INFO L226 Difference]: Without dead ends: 13416 [2021-08-21 18:53:34,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 2798.7ms TimeCoverageRelationStatistics Valid=526, Invalid=2780, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 18:53:34,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13416 states. [2021-08-21 18:53:34,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13416 to 8882. [2021-08-21 18:53:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8882 states, 8881 states have (on average 2.311113613331832) internal successors, (20525), 8881 states have internal predecessors, (20525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8882 states to 8882 states and 20525 transitions. [2021-08-21 18:53:34,725 INFO L78 Accepts]: Start accepts. Automaton has 8882 states and 20525 transitions. Word has length 30 [2021-08-21 18:53:34,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:34,725 INFO L470 AbstractCegarLoop]: Abstraction has 8882 states and 20525 transitions. [2021-08-21 18:53:34,725 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) [2021-08-21 18:53:34,725 INFO L276 IsEmpty]: Start isEmpty. Operand 8882 states and 20525 transitions. [2021-08-21 18:53:34,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:53:34,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:34,735 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:34,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-21 18:53:34,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-21 18:53:34,936 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:53:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:34,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1116657546, now seen corresponding path program 94 times [2021-08-21 18:53:34,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:34,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534361735] [2021-08-21 18:53:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:34,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:53:35,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:35,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534361735] [2021-08-21 18:53:35,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534361735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:35,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813761159] [2021-08-21 18:53:35,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:53:35,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:35,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:35,456 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) [2021-08-21 18:53:35,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 18:53:38,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:53:38,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:38,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:53:38,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:39,674 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:53:39,674 INFO L388 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 34 treesize of output 25 [2021-08-21 18:53:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:53:39,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813761159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:39,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:39,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:53:39,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676130299] [2021-08-21 18:53:39,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:53:39,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:39,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:53:39,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:53:39,741 INFO L87 Difference]: Start difference. First operand 8882 states and 20525 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:53:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:41,610 INFO L93 Difference]: Finished difference Result 11364 states and 25836 transitions. [2021-08-21 18:53:41,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:53:41,610 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-21 18:53:41,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:41,626 INFO L225 Difference]: With dead ends: 11364 [2021-08-21 18:53:41,626 INFO L226 Difference]: Without dead ends: 11359 [2021-08-21 18:53:41,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1703.4ms TimeCoverageRelationStatistics Valid=354, Invalid=1368, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:53:41,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11359 states. [2021-08-21 18:53:41,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11359 to 8912. [2021-08-21 18:53:41,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8912 states, 8911 states have (on average 2.3113006396588487) internal successors, (20596), 8911 states have internal predecessors, (20596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:41,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8912 states to 8912 states and 20596 transitions. [2021-08-21 18:53:41,806 INFO L78 Accepts]: Start accepts. Automaton has 8912 states and 20596 transitions. Word has length 30 [2021-08-21 18:53:41,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:41,806 INFO L470 AbstractCegarLoop]: Abstraction has 8912 states and 20596 transitions. [2021-08-21 18:53:41,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:53:41,807 INFO L276 IsEmpty]: Start isEmpty. Operand 8912 states and 20596 transitions. [2021-08-21 18:53:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:53:41,818 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:41,818 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:41,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-21 18:53:42,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-21 18:53:42,022 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:53:42,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:42,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1732732682, now seen corresponding path program 95 times [2021-08-21 18:53:42,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:42,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246029492] [2021-08-21 18:53:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:42,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:53:42,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:42,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246029492] [2021-08-21 18:53:42,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246029492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:42,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419819161] [2021-08-21 18:53:42,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:53:42,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:42,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:42,370 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) [2021-08-21 18:53:42,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 18:53:45,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:53:45,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:45,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:53:45,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:46,814 INFO L354 Elim1Store]: treesize reduction 66, result has 9.6 percent of original size [2021-08-21 18:53:46,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 35 [2021-08-21 18:53:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:53:46,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419819161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:46,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:46,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:53:46,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739537463] [2021-08-21 18:53:46,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:53:46,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:46,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:53:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:53:46,900 INFO L87 Difference]: Start difference. First operand 8912 states and 20596 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) [2021-08-21 18:53:50,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:50,599 INFO L93 Difference]: Finished difference Result 12383 states and 28417 transitions. [2021-08-21 18:53:50,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:53:50,600 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 30 [2021-08-21 18:53:50,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:50,620 INFO L225 Difference]: With dead ends: 12383 [2021-08-21 18:53:50,621 INFO L226 Difference]: Without dead ends: 12378 [2021-08-21 18:53:50,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 3175.4ms TimeCoverageRelationStatistics Valid=409, Invalid=3373, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:53:50,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12378 states. [2021-08-21 18:53:50,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12378 to 8920. [2021-08-21 18:53:50,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8920 states, 8919 states have (on average 2.3110214149568336) internal successors, (20612), 8919 states have internal predecessors, (20612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8920 states to 8920 states and 20612 transitions. [2021-08-21 18:53:50,780 INFO L78 Accepts]: Start accepts. Automaton has 8920 states and 20612 transitions. Word has length 30 [2021-08-21 18:53:50,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:50,780 INFO L470 AbstractCegarLoop]: Abstraction has 8920 states and 20612 transitions. [2021-08-21 18:53:50,780 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) [2021-08-21 18:53:50,780 INFO L276 IsEmpty]: Start isEmpty. Operand 8920 states and 20612 transitions. [2021-08-21 18:53:50,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:53:50,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:50,791 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:50,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:51,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-21 18:53:51,017 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:53:51,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:51,017 INFO L82 PathProgramCache]: Analyzing trace with hash -816950578, now seen corresponding path program 96 times [2021-08-21 18:53:51,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:51,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887079123] [2021-08-21 18:53:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:51,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:53:51,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:51,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887079123] [2021-08-21 18:53:51,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887079123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:51,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340530913] [2021-08-21 18:53:51,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:53:51,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:51,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:51,393 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) [2021-08-21 18:53:51,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 18:53:55,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:53:55,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:55,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:53:55,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:55,852 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:53:55,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-21 18:53:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:53:55,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340530913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:55,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:55,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:53:55,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164581853] [2021-08-21 18:53:55,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:53:55,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:55,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:53:55,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:53:55,927 INFO L87 Difference]: Start difference. First operand 8920 states and 20612 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) [2021-08-21 18:53:59,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:59,782 INFO L93 Difference]: Finished difference Result 12377 states and 28411 transitions. [2021-08-21 18:53:59,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 18:53:59,783 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 30 [2021-08-21 18:53:59,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:59,800 INFO L225 Difference]: With dead ends: 12377 [2021-08-21 18:53:59,800 INFO L226 Difference]: Without dead ends: 12372 [2021-08-21 18:53:59,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 3371.8ms TimeCoverageRelationStatistics Valid=559, Invalid=3863, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 18:53:59,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12372 states. [2021-08-21 18:53:59,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12372 to 8920. [2021-08-21 18:53:59,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8920 states, 8919 states have (on average 2.3110214149568336) internal successors, (20612), 8919 states have internal predecessors, (20612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8920 states to 8920 states and 20612 transitions. [2021-08-21 18:53:59,949 INFO L78 Accepts]: Start accepts. Automaton has 8920 states and 20612 transitions. Word has length 30 [2021-08-21 18:53:59,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:59,950 INFO L470 AbstractCegarLoop]: Abstraction has 8920 states and 20612 transitions. [2021-08-21 18:53:59,950 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) [2021-08-21 18:53:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 8920 states and 20612 transitions. [2021-08-21 18:53:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:53:59,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:59,960 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:59,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-21 18:54:00,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-21 18:54:00,161 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:54:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:00,161 INFO L82 PathProgramCache]: Analyzing trace with hash 33636106, now seen corresponding path program 97 times [2021-08-21 18:54:00,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:00,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428378960] [2021-08-21 18:54:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:00,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:00,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:00,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428378960] [2021-08-21 18:54:00,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428378960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:00,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63957436] [2021-08-21 18:54:00,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:54:00,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:00,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:00,516 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) [2021-08-21 18:54:00,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 18:54:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:04,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:54:04,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:04,856 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:54:04,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-21 18:54:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:04,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63957436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:04,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:04,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:54:04,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466958281] [2021-08-21 18:54:04,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:54:04,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:04,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:54:04,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:54:04,928 INFO L87 Difference]: Start difference. First operand 8920 states and 20612 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) [2021-08-21 18:54:09,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:09,464 INFO L93 Difference]: Finished difference Result 12675 states and 29175 transitions. [2021-08-21 18:54:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 18:54:09,464 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 30 [2021-08-21 18:54:09,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:09,485 INFO L225 Difference]: With dead ends: 12675 [2021-08-21 18:54:09,485 INFO L226 Difference]: Without dead ends: 12670 [2021-08-21 18:54:09,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1504 ImplicationChecksByTransitivity, 3879.0ms TimeCoverageRelationStatistics Valid=667, Invalid=4445, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 18:54:09,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12670 states. [2021-08-21 18:54:09,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12670 to 8922. [2021-08-21 18:54:09,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8922 states, 8921 states have (on average 2.311175877143818) internal successors, (20618), 8921 states have internal predecessors, (20618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:09,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8922 states to 8922 states and 20618 transitions. [2021-08-21 18:54:09,643 INFO L78 Accepts]: Start accepts. Automaton has 8922 states and 20618 transitions. Word has length 30 [2021-08-21 18:54:09,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:09,643 INFO L470 AbstractCegarLoop]: Abstraction has 8922 states and 20618 transitions. [2021-08-21 18:54:09,643 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) [2021-08-21 18:54:09,643 INFO L276 IsEmpty]: Start isEmpty. Operand 8922 states and 20618 transitions. [2021-08-21 18:54:09,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:54:09,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:09,654 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:09,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-21 18:54:09,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:09,857 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:54:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:09,857 INFO L82 PathProgramCache]: Analyzing trace with hash 649711242, now seen corresponding path program 31 times [2021-08-21 18:54:09,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:09,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623905203] [2021-08-21 18:54:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:09,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:10,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:10,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623905203] [2021-08-21 18:54:10,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623905203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:10,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7635257] [2021-08-21 18:54:10,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:54:10,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:10,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:10,329 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) [2021-08-21 18:54:10,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 18:54:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:14,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:54:14,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:14,579 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-21 18:54:14,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 35 treesize of output 28 [2021-08-21 18:54:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:14,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7635257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:14,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:14,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-21 18:54:14,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606648372] [2021-08-21 18:54:14,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:54:14,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:14,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:54:14,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:54:14,655 INFO L87 Difference]: Start difference. First operand 8922 states and 20618 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 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) [2021-08-21 18:54:17,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:17,869 INFO L93 Difference]: Finished difference Result 13056 states and 29643 transitions. [2021-08-21 18:54:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 18:54:17,869 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:54:17,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:17,906 INFO L225 Difference]: With dead ends: 13056 [2021-08-21 18:54:17,906 INFO L226 Difference]: Without dead ends: 13041 [2021-08-21 18:54:17,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 2923.9ms TimeCoverageRelationStatistics Valid=618, Invalid=3672, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 18:54:17,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13041 states. [2021-08-21 18:54:18,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13041 to 8925. [2021-08-21 18:54:18,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8925 states, 8924 states have (on average 2.3110712684894668) internal successors, (20624), 8924 states have internal predecessors, (20624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8925 states to 8925 states and 20624 transitions. [2021-08-21 18:54:18,066 INFO L78 Accepts]: Start accepts. Automaton has 8925 states and 20624 transitions. Word has length 30 [2021-08-21 18:54:18,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:18,066 INFO L470 AbstractCegarLoop]: Abstraction has 8925 states and 20624 transitions. [2021-08-21 18:54:18,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 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) [2021-08-21 18:54:18,067 INFO L276 IsEmpty]: Start isEmpty. Operand 8925 states and 20624 transitions. [2021-08-21 18:54:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:54:18,076 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:18,077 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:18,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-21 18:54:18,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:18,278 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:54:18,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:18,278 INFO L82 PathProgramCache]: Analyzing trace with hash 568821386, now seen corresponding path program 32 times [2021-08-21 18:54:18,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:18,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546735944] [2021-08-21 18:54:18,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:18,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:18,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:18,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546735944] [2021-08-21 18:54:18,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546735944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:18,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563300820] [2021-08-21 18:54:18,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:18,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:18,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:18,833 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) [2021-08-21 18:54:18,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 18:54:22,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:22,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:22,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:54:22,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:23,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:54:23,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:54:23,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:54:23,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:54:23,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:54:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:54:23,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:54:23,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 67 [2021-08-21 18:54:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:23,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563300820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:23,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:23,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-08-21 18:54:23,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703029838] [2021-08-21 18:54:23,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:54:23,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:23,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:54:23,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:54:23,242 INFO L87 Difference]: Start difference. First operand 8925 states and 20624 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:27,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:27,442 INFO L93 Difference]: Finished difference Result 13234 states and 30191 transitions. [2021-08-21 18:54:27,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 18:54:27,443 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:54:27,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:27,467 INFO L225 Difference]: With dead ends: 13234 [2021-08-21 18:54:27,467 INFO L226 Difference]: Without dead ends: 13229 [2021-08-21 18:54:27,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 3696.0ms TimeCoverageRelationStatistics Valid=827, Invalid=4003, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 18:54:27,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13229 states. [2021-08-21 18:54:27,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13229 to 8924. [2021-08-21 18:54:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8924 states, 8923 states have (on average 2.310881990361986) internal successors, (20620), 8923 states have internal predecessors, (20620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8924 states to 8924 states and 20620 transitions. [2021-08-21 18:54:27,678 INFO L78 Accepts]: Start accepts. Automaton has 8924 states and 20620 transitions. Word has length 30 [2021-08-21 18:54:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:27,678 INFO L470 AbstractCegarLoop]: Abstraction has 8924 states and 20620 transitions. [2021-08-21 18:54:27,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 8924 states and 20620 transitions. [2021-08-21 18:54:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:54:27,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:27,690 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:27,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-21 18:54:27,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-08-21 18:54:27,891 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:54:27,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:27,891 INFO L82 PathProgramCache]: Analyzing trace with hash 809482314, now seen corresponding path program 98 times [2021-08-21 18:54:27,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:27,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375221809] [2021-08-21 18:54:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:27,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:28,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:28,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375221809] [2021-08-21 18:54:28,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375221809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:28,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147238065] [2021-08-21 18:54:28,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:28,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:28,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:28,387 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) [2021-08-21 18:54:28,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 18:54:32,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:32,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:32,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:54:32,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:33,011 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:54:33,011 INFO L388 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 34 treesize of output 25 [2021-08-21 18:54:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:33,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147238065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:33,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:33,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:54:33,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555377766] [2021-08-21 18:54:33,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:54:33,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:33,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:54:33,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:54:33,062 INFO L87 Difference]: Start difference. First operand 8924 states and 20620 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-08-21 18:54:34,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:34,282 INFO L93 Difference]: Finished difference Result 11471 states and 26329 transitions. [2021-08-21 18:54:34,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:54:34,283 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:54:34,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:34,300 INFO L225 Difference]: With dead ends: 11471 [2021-08-21 18:54:34,301 INFO L226 Difference]: Without dead ends: 11439 [2021-08-21 18:54:34,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1222.7ms TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:54:34,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11439 states. [2021-08-21 18:54:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11439 to 8944. [2021-08-21 18:54:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8944 states, 8943 states have (on average 2.311081292631108) internal successors, (20668), 8943 states have internal predecessors, (20668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:34,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8944 states to 8944 states and 20668 transitions. [2021-08-21 18:54:34,438 INFO L78 Accepts]: Start accepts. Automaton has 8944 states and 20668 transitions. Word has length 30 [2021-08-21 18:54:34,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:34,438 INFO L470 AbstractCegarLoop]: Abstraction has 8944 states and 20668 transitions. [2021-08-21 18:54:34,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-08-21 18:54:34,438 INFO L276 IsEmpty]: Start isEmpty. Operand 8944 states and 20668 transitions. [2021-08-21 18:54:34,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:54:34,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:34,448 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:34,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-21 18:54:34,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:34,649 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:54:34,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:34,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1063271438, now seen corresponding path program 99 times [2021-08-21 18:54:34,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:34,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488167793] [2021-08-21 18:54:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:34,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:35,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:35,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488167793] [2021-08-21 18:54:35,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488167793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:35,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522449552] [2021-08-21 18:54:35,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:35,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:35,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:35,024 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) [2021-08-21 18:54:35,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 18:54:38,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:54:38,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:38,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:54:38,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:39,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:54:39,547 INFO L388 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 43 treesize of output 71 [2021-08-21 18:54:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:39,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522449552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:39,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:39,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-21 18:54:39,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954797184] [2021-08-21 18:54:39,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:54:39,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:39,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:54:39,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:54:39,933 INFO L87 Difference]: Start difference. First operand 8944 states and 20668 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) [2021-08-21 18:54:42,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:42,285 INFO L93 Difference]: Finished difference Result 11454 states and 26298 transitions. [2021-08-21 18:54:42,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:54:42,286 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 30 [2021-08-21 18:54:42,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:42,303 INFO L225 Difference]: With dead ends: 11454 [2021-08-21 18:54:42,303 INFO L226 Difference]: Without dead ends: 11418 [2021-08-21 18:54:42,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 2069.0ms TimeCoverageRelationStatistics Valid=334, Invalid=2116, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:54:42,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11418 states. [2021-08-21 18:54:42,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11418 to 8954. [2021-08-21 18:54:42,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8954 states, 8953 states have (on average 2.3109572210432257) internal successors, (20690), 8953 states have internal predecessors, (20690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8954 states to 8954 states and 20690 transitions. [2021-08-21 18:54:42,444 INFO L78 Accepts]: Start accepts. Automaton has 8954 states and 20690 transitions. Word has length 30 [2021-08-21 18:54:42,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:42,444 INFO L470 AbstractCegarLoop]: Abstraction has 8954 states and 20690 transitions. [2021-08-21 18:54:42,444 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) [2021-08-21 18:54:42,444 INFO L276 IsEmpty]: Start isEmpty. Operand 8954 states and 20690 transitions. [2021-08-21 18:54:42,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:54:42,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:42,454 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:42,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-21 18:54:42,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:42,655 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:54:42,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:42,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1040265270, now seen corresponding path program 100 times [2021-08-21 18:54:42,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:42,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059576788] [2021-08-21 18:54:42,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:42,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:43,284 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:43,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:43,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059576788] [2021-08-21 18:54:43,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059576788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:43,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211927884] [2021-08-21 18:54:43,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:43,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:43,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:43,285 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) [2021-08-21 18:54:43,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 18:54:47,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:47,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:47,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:54:47,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:47,713 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:54:47,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-21 18:54:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:47,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211927884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:47,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:47,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-08-21 18:54:47,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757291980] [2021-08-21 18:54:47,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:54:47,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:47,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:54:47,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:54:47,763 INFO L87 Difference]: Start difference. First operand 8954 states and 20690 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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) [2021-08-21 18:54:50,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:50,119 INFO L93 Difference]: Finished difference Result 9062 states and 20851 transitions. [2021-08-21 18:54:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:54:50,120 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:54:50,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:50,133 INFO L225 Difference]: With dead ends: 9062 [2021-08-21 18:54:50,133 INFO L226 Difference]: Without dead ends: 9047 [2021-08-21 18:54:50,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2274.7ms TimeCoverageRelationStatistics Valid=352, Invalid=2510, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:54:50,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9047 states. [2021-08-21 18:54:50,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9047 to 8968. [2021-08-21 18:54:50,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8968 states, 8967 states have (on average 2.3115869298539087) internal successors, (20728), 8967 states have internal predecessors, (20728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8968 states to 8968 states and 20728 transitions. [2021-08-21 18:54:50,252 INFO L78 Accepts]: Start accepts. Automaton has 8968 states and 20728 transitions. Word has length 30 [2021-08-21 18:54:50,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:50,252 INFO L470 AbstractCegarLoop]: Abstraction has 8968 states and 20728 transitions. [2021-08-21 18:54:50,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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) [2021-08-21 18:54:50,252 INFO L276 IsEmpty]: Start isEmpty. Operand 8968 states and 20728 transitions. [2021-08-21 18:54:50,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:54:50,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:50,262 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:50,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-21 18:54:50,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 18:54:50,463 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:54:50,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:50,463 INFO L82 PathProgramCache]: Analyzing trace with hash 152201162, now seen corresponding path program 101 times [2021-08-21 18:54:50,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:50,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642131092] [2021-08-21 18:54:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:50,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:50,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:50,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642131092] [2021-08-21 18:54:50,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642131092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:50,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918601905] [2021-08-21 18:54:50,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:50,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:50,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:50,896 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) [2021-08-21 18:54:50,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 18:54:54,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:54:54,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:54,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:54:54,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:55,414 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:54:55,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-21 18:54:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:55,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918601905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:55,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:55,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-08-21 18:54:55,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340002272] [2021-08-21 18:54:55,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:54:55,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:55,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:54:55,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:54:55,465 INFO L87 Difference]: Start difference. First operand 8968 states and 20728 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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) [2021-08-21 18:54:58,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:58,129 INFO L93 Difference]: Finished difference Result 9835 states and 22208 transitions. [2021-08-21 18:54:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 18:54:58,129 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:54:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:58,145 INFO L225 Difference]: With dead ends: 9835 [2021-08-21 18:54:58,145 INFO L226 Difference]: Without dead ends: 9824 [2021-08-21 18:54:58,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2459.0ms TimeCoverageRelationStatistics Valid=460, Invalid=3200, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:54:58,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9824 states. [2021-08-21 18:54:58,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9824 to 8984. [2021-08-21 18:54:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8984 states, 8983 states have (on average 2.3109206278526107) internal successors, (20759), 8983 states have internal predecessors, (20759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:58,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8984 states to 8984 states and 20759 transitions. [2021-08-21 18:54:58,282 INFO L78 Accepts]: Start accepts. Automaton has 8984 states and 20759 transitions. Word has length 30 [2021-08-21 18:54:58,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:58,282 INFO L470 AbstractCegarLoop]: Abstraction has 8984 states and 20759 transitions. [2021-08-21 18:54:58,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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) [2021-08-21 18:54:58,282 INFO L276 IsEmpty]: Start isEmpty. Operand 8984 states and 20759 transitions. [2021-08-21 18:54:58,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:54:58,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:58,293 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:58,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:58,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 18:54:58,494 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:54:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:58,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1339293750, now seen corresponding path program 102 times [2021-08-21 18:54:58,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:58,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893843855] [2021-08-21 18:54:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:58,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:58,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:58,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893843855] [2021-08-21 18:54:58,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893843855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:58,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065462722] [2021-08-21 18:54:58,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:54:58,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:58,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:58,839 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) [2021-08-21 18:54:58,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 18:55:02,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:55:02,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:02,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:55:02,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:03,347 INFO L354 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2021-08-21 18:55:03,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 61 [2021-08-21 18:55:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:55:03,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065462722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:03,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:03,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:55:03,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326914090] [2021-08-21 18:55:03,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:55:03,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:03,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:55:03,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:55:03,761 INFO L87 Difference]: Start difference. First operand 8984 states and 20759 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) [2021-08-21 18:55:05,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:05,039 INFO L93 Difference]: Finished difference Result 11447 states and 26328 transitions. [2021-08-21 18:55:05,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:55:05,039 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 30 [2021-08-21 18:55:05,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:05,063 INFO L225 Difference]: With dead ends: 11447 [2021-08-21 18:55:05,063 INFO L226 Difference]: Without dead ends: 11431 [2021-08-21 18:55:05,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1153.0ms TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:55:05,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11431 states. [2021-08-21 18:55:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11431 to 8986. [2021-08-21 18:55:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8986 states, 8985 states have (on average 2.3106288258208125) internal successors, (20761), 8985 states have internal predecessors, (20761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8986 states to 8986 states and 20761 transitions. [2021-08-21 18:55:05,221 INFO L78 Accepts]: Start accepts. Automaton has 8986 states and 20761 transitions. Word has length 30 [2021-08-21 18:55:05,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:05,221 INFO L470 AbstractCegarLoop]: Abstraction has 8986 states and 20761 transitions. [2021-08-21 18:55:05,222 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) [2021-08-21 18:55:05,222 INFO L276 IsEmpty]: Start isEmpty. Operand 8986 states and 20761 transitions. [2021-08-21 18:55:05,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:55:05,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:05,233 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:05,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:05,434 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,SelfDestructingSolverStorable136 [2021-08-21 18:55:05,434 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:55:05,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:05,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1478039478, now seen corresponding path program 103 times [2021-08-21 18:55:05,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:05,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816117680] [2021-08-21 18:55:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:05,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:55:05,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:05,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816117680] [2021-08-21 18:55:05,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816117680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:05,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227270616] [2021-08-21 18:55:05,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:55:05,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:05,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:05,808 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) [2021-08-21 18:55:05,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 18:55:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:09,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:55:09,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:10,479 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:55:10,479 INFO L388 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 34 treesize of output 25 [2021-08-21 18:55:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:55:10,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227270616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:10,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:10,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:55:10,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841859057] [2021-08-21 18:55:10,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:55:10,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:10,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:55:10,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:55:10,542 INFO L87 Difference]: Start difference. First operand 8986 states and 20761 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:55:12,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:12,232 INFO L93 Difference]: Finished difference Result 12574 states and 28741 transitions. [2021-08-21 18:55:12,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:55:12,232 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-21 18:55:12,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:12,252 INFO L225 Difference]: With dead ends: 12574 [2021-08-21 18:55:12,252 INFO L226 Difference]: Without dead ends: 12561 [2021-08-21 18:55:12,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1337.5ms TimeCoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:55:12,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12561 states. [2021-08-21 18:55:12,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12561 to 8984. [2021-08-21 18:55:12,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8984 states, 8983 states have (on average 2.3106979850829346) internal successors, (20757), 8983 states have internal predecessors, (20757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:12,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8984 states to 8984 states and 20757 transitions. [2021-08-21 18:55:12,397 INFO L78 Accepts]: Start accepts. Automaton has 8984 states and 20757 transitions. Word has length 30 [2021-08-21 18:55:12,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:12,397 INFO L470 AbstractCegarLoop]: Abstraction has 8984 states and 20757 transitions. [2021-08-21 18:55:12,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:55:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 8984 states and 20757 transitions. [2021-08-21 18:55:12,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:55:12,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:12,407 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:12,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-08-21 18:55:12,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:12,608 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:55:12,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:12,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1558929334, now seen corresponding path program 104 times [2021-08-21 18:55:12,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:12,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879588575] [2021-08-21 18:55:12,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:12,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:55:13,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:13,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879588575] [2021-08-21 18:55:13,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879588575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:13,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260875901] [2021-08-21 18:55:13,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:13,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:13,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:13,082 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) [2021-08-21 18:55:13,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 18:55:17,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:17,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:55:17,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:17,892 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-08-21 18:55:17,892 INFO L388 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 41 treesize of output 53 [2021-08-21 18:55:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:55:18,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260875901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:18,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:18,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:55:18,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355666008] [2021-08-21 18:55:18,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:55:18,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:18,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:55:18,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:55:18,083 INFO L87 Difference]: Start difference. First operand 8984 states and 20757 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-08-21 18:55:20,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:20,712 INFO L93 Difference]: Finished difference Result 13541 states and 30842 transitions. [2021-08-21 18:55:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:55:20,712 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 30 [2021-08-21 18:55:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:20,735 INFO L225 Difference]: With dead ends: 13541 [2021-08-21 18:55:20,736 INFO L226 Difference]: Without dead ends: 13532 [2021-08-21 18:55:20,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 2234.2ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:55:20,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13532 states. [2021-08-21 18:55:20,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13532 to 8986. [2021-08-21 18:55:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8986 states, 8985 states have (on average 2.3106288258208125) internal successors, (20761), 8985 states have internal predecessors, (20761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:20,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8986 states to 8986 states and 20761 transitions. [2021-08-21 18:55:20,897 INFO L78 Accepts]: Start accepts. Automaton has 8986 states and 20761 transitions. Word has length 30 [2021-08-21 18:55:20,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:20,897 INFO L470 AbstractCegarLoop]: Abstraction has 8986 states and 20761 transitions. [2021-08-21 18:55:20,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-08-21 18:55:20,897 INFO L276 IsEmpty]: Start isEmpty. Operand 8986 states and 20761 transitions. [2021-08-21 18:55:20,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:55:20,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:20,908 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:20,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-21 18:55:21,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-21 18:55:21,108 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:55:21,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:21,109 INFO L82 PathProgramCache]: Analyzing trace with hash 621783822, now seen corresponding path program 105 times [2021-08-21 18:55:21,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:21,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781406409] [2021-08-21 18:55:21,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:21,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:55:21,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:21,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781406409] [2021-08-21 18:55:21,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781406409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:21,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125511462] [2021-08-21 18:55:21,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:21,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:21,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:21,454 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) [2021-08-21 18:55:21,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 18:55:25,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:55:25,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:25,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:55:25,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:26,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:55:26,257 INFO L388 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 43 treesize of output 71 [2021-08-21 18:55:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:55:27,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125511462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:27,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:27,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-21 18:55:27,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642225800] [2021-08-21 18:55:27,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:55:27,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:27,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:55:27,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:55:27,985 INFO L87 Difference]: Start difference. First operand 8986 states and 20761 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) [2021-08-21 18:55:32,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:32,814 INFO L93 Difference]: Finished difference Result 13549 states and 30846 transitions. [2021-08-21 18:55:32,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 18:55:32,814 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 30 [2021-08-21 18:55:32,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:32,838 INFO L225 Difference]: With dead ends: 13549 [2021-08-21 18:55:32,839 INFO L226 Difference]: Without dead ends: 13527 [2021-08-21 18:55:32,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 4228.3ms TimeCoverageRelationStatistics Valid=773, Invalid=4197, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 18:55:32,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13527 states. [2021-08-21 18:55:32,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13527 to 8990. [2021-08-21 18:55:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8990 states, 8989 states have (on average 2.31049059962176) internal successors, (20769), 8989 states have internal predecessors, (20769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8990 states to 8990 states and 20769 transitions. [2021-08-21 18:55:33,010 INFO L78 Accepts]: Start accepts. Automaton has 8990 states and 20769 transitions. Word has length 30 [2021-08-21 18:55:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:33,010 INFO L470 AbstractCegarLoop]: Abstraction has 8990 states and 20769 transitions. [2021-08-21 18:55:33,010 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) [2021-08-21 18:55:33,010 INFO L276 IsEmpty]: Start isEmpty. Operand 8990 states and 20769 transitions. [2021-08-21 18:55:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:55:33,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:33,021 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:33,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:33,222 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,SelfDestructingSolverStorable139 [2021-08-21 18:55:33,222 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:55:33,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:33,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1913858122, now seen corresponding path program 106 times [2021-08-21 18:55:33,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:33,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648227243] [2021-08-21 18:55:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:33,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:55:33,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:33,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648227243] [2021-08-21 18:55:33,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648227243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:33,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467558820] [2021-08-21 18:55:33,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:55:33,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:33,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:33,623 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) [2021-08-21 18:55:33,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 18:55:37,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:55:37,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:37,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:55:37,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:38,481 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:55:38,481 INFO L388 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 34 treesize of output 25 [2021-08-21 18:55:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:55:38,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467558820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:38,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:38,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:55:38,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128504047] [2021-08-21 18:55:38,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:55:38,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:38,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:55:38,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:55:38,544 INFO L87 Difference]: Start difference. First operand 8990 states and 20769 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:55:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:39,912 INFO L93 Difference]: Finished difference Result 12579 states and 28763 transitions. [2021-08-21 18:55:39,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:55:39,912 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-21 18:55:39,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:39,933 INFO L225 Difference]: With dead ends: 12579 [2021-08-21 18:55:39,933 INFO L226 Difference]: Without dead ends: 12564 [2021-08-21 18:55:39,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1153.2ms TimeCoverageRelationStatistics Valid=319, Invalid=1241, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:55:39,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12564 states. [2021-08-21 18:55:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12564 to 8994. [2021-08-21 18:55:40,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8994 states, 8993 states have (on average 2.31046369398421) internal successors, (20778), 8993 states have internal predecessors, (20778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8994 states to 8994 states and 20778 transitions. [2021-08-21 18:55:40,129 INFO L78 Accepts]: Start accepts. Automaton has 8994 states and 20778 transitions. Word has length 30 [2021-08-21 18:55:40,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:40,129 INFO L470 AbstractCegarLoop]: Abstraction has 8994 states and 20778 transitions. [2021-08-21 18:55:40,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:55:40,129 INFO L276 IsEmpty]: Start isEmpty. Operand 8994 states and 20778 transitions. [2021-08-21 18:55:40,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:55:40,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:40,140 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:40,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-21 18:55:40,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:40,340 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:55:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:40,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1765034038, now seen corresponding path program 107 times [2021-08-21 18:55:40,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:40,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141865510] [2021-08-21 18:55:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:40,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:55:40,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:40,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141865510] [2021-08-21 18:55:40,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141865510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:40,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038348898] [2021-08-21 18:55:40,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:55:40,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:40,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:40,728 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) [2021-08-21 18:55:40,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-21 18:55:44,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:55:44,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:44,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:55:44,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:45,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:55:45,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:55:45,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:55:45,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:55:45,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:55:45,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-08-21 18:55:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:55:45,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038348898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:45,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:45,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-21 18:55:45,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850281305] [2021-08-21 18:55:45,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:55:45,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:45,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:55:45,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:55:45,721 INFO L87 Difference]: Start difference. First operand 8994 states and 20778 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:49,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:49,954 INFO L93 Difference]: Finished difference Result 12633 states and 28856 transitions. [2021-08-21 18:55:49,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-21 18:55:49,955 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:55:49,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:49,982 INFO L225 Difference]: With dead ends: 12633 [2021-08-21 18:55:49,983 INFO L226 Difference]: Without dead ends: 12617 [2021-08-21 18:55:49,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 3635.2ms TimeCoverageRelationStatistics Valid=838, Invalid=6818, Unknown=0, NotChecked=0, Total=7656 [2021-08-21 18:55:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12617 states. [2021-08-21 18:55:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12617 to 8992. [2021-08-21 18:55:50,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8992 states, 8991 states have (on average 2.3105327549771992) internal successors, (20774), 8991 states have internal predecessors, (20774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8992 states to 8992 states and 20774 transitions. [2021-08-21 18:55:50,239 INFO L78 Accepts]: Start accepts. Automaton has 8992 states and 20774 transitions. Word has length 30 [2021-08-21 18:55:50,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:50,239 INFO L470 AbstractCegarLoop]: Abstraction has 8992 states and 20774 transitions. [2021-08-21 18:55:50,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand 8992 states and 20774 transitions. [2021-08-21 18:55:50,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:55:50,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:50,248 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:50,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:50,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:50,449 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:55:50,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:50,450 INFO L82 PathProgramCache]: Analyzing trace with hash -240297718, now seen corresponding path program 108 times [2021-08-21 18:55:50,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:50,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576133564] [2021-08-21 18:55:50,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:50,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:50,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:55:50,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:50,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576133564] [2021-08-21 18:55:50,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576133564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:50,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296466078] [2021-08-21 18:55:50,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:55:50,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:50,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:50,836 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) [2021-08-21 18:55:50,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-21 18:55:55,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:55:55,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:55,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:55:55,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:55,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:55:55,813 INFO L388 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 43 treesize of output 71 [2021-08-21 18:55:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:55:56,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296466078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:56,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:56,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-21 18:55:56,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233967062] [2021-08-21 18:55:56,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:55:56,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:56,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:55:56,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:55:56,228 INFO L87 Difference]: Start difference. First operand 8992 states and 20774 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) [2021-08-21 18:55:58,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:58,072 INFO L93 Difference]: Finished difference Result 11474 states and 26377 transitions. [2021-08-21 18:55:58,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:55:58,072 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 30 [2021-08-21 18:55:58,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:58,093 INFO L225 Difference]: With dead ends: 11474 [2021-08-21 18:55:58,094 INFO L226 Difference]: Without dead ends: 11464 [2021-08-21 18:55:58,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1527.2ms TimeCoverageRelationStatistics Valid=305, Invalid=1951, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:55:58,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11464 states. [2021-08-21 18:55:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11464 to 8996. [2021-08-21 18:55:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8996 states, 8995 states have (on average 2.310617009449694) internal successors, (20784), 8995 states have internal predecessors, (20784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8996 states to 8996 states and 20784 transitions. [2021-08-21 18:55:58,246 INFO L78 Accepts]: Start accepts. Automaton has 8996 states and 20784 transitions. Word has length 30 [2021-08-21 18:55:58,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:58,246 INFO L470 AbstractCegarLoop]: Abstraction has 8996 states and 20784 transitions. [2021-08-21 18:55:58,246 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) [2021-08-21 18:55:58,246 INFO L276 IsEmpty]: Start isEmpty. Operand 8996 states and 20784 transitions. [2021-08-21 18:55:58,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:55:58,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:58,257 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:58,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:58,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:58,458 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:55:58,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:58,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1812682486, now seen corresponding path program 109 times [2021-08-21 18:55:58,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:58,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382991016] [2021-08-21 18:55:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:58,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:55:58,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:58,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382991016] [2021-08-21 18:55:58,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382991016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:58,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608838076] [2021-08-21 18:55:58,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:55:58,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:58,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:58,914 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) [2021-08-21 18:55:58,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-21 18:56:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:03,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:56:03,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:03,770 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-08-21 18:56:03,771 INFO L388 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 41 treesize of output 53 [2021-08-21 18:56:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:03,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608838076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:03,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:03,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:56:03,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162742807] [2021-08-21 18:56:03,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:56:03,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:03,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:56:03,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:56:03,951 INFO L87 Difference]: Start difference. First operand 8996 states and 20784 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-08-21 18:56:05,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:05,291 INFO L93 Difference]: Finished difference Result 12494 states and 28645 transitions. [2021-08-21 18:56:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:56:05,291 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 30 [2021-08-21 18:56:05,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:05,314 INFO L225 Difference]: With dead ends: 12494 [2021-08-21 18:56:05,315 INFO L226 Difference]: Without dead ends: 12485 [2021-08-21 18:56:05,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1139.4ms TimeCoverageRelationStatistics Valid=287, Invalid=1353, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:56:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12485 states. [2021-08-21 18:56:05,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12485 to 8996. [2021-08-21 18:56:05,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8996 states, 8995 states have (on average 2.310617009449694) internal successors, (20784), 8995 states have internal predecessors, (20784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:05,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8996 states to 8996 states and 20784 transitions. [2021-08-21 18:56:05,479 INFO L78 Accepts]: Start accepts. Automaton has 8996 states and 20784 transitions. Word has length 30 [2021-08-21 18:56:05,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:05,479 INFO L470 AbstractCegarLoop]: Abstraction has 8996 states and 20784 transitions. [2021-08-21 18:56:05,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-08-21 18:56:05,479 INFO L276 IsEmpty]: Start isEmpty. Operand 8996 states and 20784 transitions. [2021-08-21 18:56:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:56:05,496 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:05,496 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:05,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:05,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:05,721 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:56:05,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:05,721 INFO L82 PathProgramCache]: Analyzing trace with hash 707858130, now seen corresponding path program 110 times [2021-08-21 18:56:05,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:05,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251852398] [2021-08-21 18:56:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:05,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:06,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:06,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251852398] [2021-08-21 18:56:06,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251852398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:06,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390578388] [2021-08-21 18:56:06,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:56:06,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:06,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:06,155 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) [2021-08-21 18:56:06,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-21 18:56:10,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:56:10,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:10,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:56:10,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:10,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:56:10,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:56:10,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:56:10,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-08-21 18:56:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:11,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390578388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:11,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:11,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-21 18:56:11,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690159423] [2021-08-21 18:56:11,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:56:11,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:11,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:56:11,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:56:11,095 INFO L87 Difference]: Start difference. First operand 8996 states and 20784 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-08-21 18:56:12,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:12,538 INFO L93 Difference]: Finished difference Result 11481 states and 26403 transitions. [2021-08-21 18:56:12,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:56:12,539 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:56:12,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:12,568 INFO L225 Difference]: With dead ends: 11481 [2021-08-21 18:56:12,568 INFO L226 Difference]: Without dead ends: 11476 [2021-08-21 18:56:12,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1228.5ms TimeCoverageRelationStatistics Valid=246, Invalid=1560, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:56:12,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11476 states. [2021-08-21 18:56:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11476 to 9001. [2021-08-21 18:56:12,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9001 states, 9000 states have (on average 2.310888888888889) internal successors, (20798), 9000 states have internal predecessors, (20798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:12,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 20798 transitions. [2021-08-21 18:56:12,737 INFO L78 Accepts]: Start accepts. Automaton has 9001 states and 20798 transitions. Word has length 30 [2021-08-21 18:56:12,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:12,737 INFO L470 AbstractCegarLoop]: Abstraction has 9001 states and 20798 transitions. [2021-08-21 18:56:12,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-08-21 18:56:12,737 INFO L276 IsEmpty]: Start isEmpty. Operand 9001 states and 20798 transitions. [2021-08-21 18:56:12,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:56:12,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:12,752 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:12,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:12,964 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,SelfDestructingSolverStorable144 [2021-08-21 18:56:12,965 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:56:12,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:12,965 INFO L82 PathProgramCache]: Analyzing trace with hash -409510770, now seen corresponding path program 111 times [2021-08-21 18:56:12,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:12,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188350377] [2021-08-21 18:56:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:12,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:13,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:13,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188350377] [2021-08-21 18:56:13,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188350377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:13,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608590438] [2021-08-21 18:56:13,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:13,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:13,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:13,354 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) [2021-08-21 18:56:13,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-21 18:56:17,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:56:17,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:17,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:56:17,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:18,412 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-08-21 18:56:18,412 INFO L388 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 46 treesize of output 58 [2021-08-21 18:56:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:18,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608590438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:18,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:18,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-08-21 18:56:18,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295080604] [2021-08-21 18:56:18,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:56:18,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:18,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:56:18,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:56:18,659 INFO L87 Difference]: Start difference. First operand 9001 states and 20798 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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) [2021-08-21 18:56:19,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:19,840 INFO L93 Difference]: Finished difference Result 11542 states and 26502 transitions. [2021-08-21 18:56:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:56:19,841 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:56:19,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:19,858 INFO L225 Difference]: With dead ends: 11542 [2021-08-21 18:56:19,858 INFO L226 Difference]: Without dead ends: 11532 [2021-08-21 18:56:19,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1171.8ms TimeCoverageRelationStatistics Valid=336, Invalid=1734, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:56:19,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11532 states. [2021-08-21 18:56:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11532 to 9003. [2021-08-21 18:56:19,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9003 states, 9002 states have (on average 2.3108198178182624) internal successors, (20802), 9002 states have internal predecessors, (20802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:20,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9003 states to 9003 states and 20802 transitions. [2021-08-21 18:56:20,001 INFO L78 Accepts]: Start accepts. Automaton has 9003 states and 20802 transitions. Word has length 30 [2021-08-21 18:56:20,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:20,002 INFO L470 AbstractCegarLoop]: Abstraction has 9003 states and 20802 transitions. [2021-08-21 18:56:20,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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) [2021-08-21 18:56:20,002 INFO L276 IsEmpty]: Start isEmpty. Operand 9003 states and 20802 transitions. [2021-08-21 18:56:20,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:56:20,013 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:20,013 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:20,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:20,213 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,SelfDestructingSolverStorable145 [2021-08-21 18:56:20,214 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:56:20,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:20,214 INFO L82 PathProgramCache]: Analyzing trace with hash 223628302, now seen corresponding path program 112 times [2021-08-21 18:56:20,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:20,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550388236] [2021-08-21 18:56:20,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:20,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:20,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:20,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550388236] [2021-08-21 18:56:20,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550388236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:20,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273367082] [2021-08-21 18:56:20,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:56:20,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:20,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:20,649 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) [2021-08-21 18:56:20,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-21 18:56:25,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:56:25,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:25,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:56:25,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:25,829 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:56:25,830 INFO L388 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 34 treesize of output 25 [2021-08-21 18:56:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:25,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273367082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:25,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:25,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:56:25,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845333785] [2021-08-21 18:56:25,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:56:25,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:25,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:56:25,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:56:25,894 INFO L87 Difference]: Start difference. First operand 9003 states and 20802 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:56:27,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:27,078 INFO L93 Difference]: Finished difference Result 11567 states and 26557 transitions. [2021-08-21 18:56:27,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:56:27,078 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-21 18:56:27,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:27,096 INFO L225 Difference]: With dead ends: 11567 [2021-08-21 18:56:27,096 INFO L226 Difference]: Without dead ends: 11562 [2021-08-21 18:56:27,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 982.8ms TimeCoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:56:27,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11562 states. [2021-08-21 18:56:27,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11562 to 9014. [2021-08-21 18:56:27,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9014 states, 9013 states have (on average 2.3117718850549207) internal successors, (20836), 9013 states have internal predecessors, (20836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9014 states to 9014 states and 20836 transitions. [2021-08-21 18:56:27,235 INFO L78 Accepts]: Start accepts. Automaton has 9014 states and 20836 transitions. Word has length 30 [2021-08-21 18:56:27,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:27,235 INFO L470 AbstractCegarLoop]: Abstraction has 9014 states and 20836 transitions. [2021-08-21 18:56:27,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:56:27,235 INFO L276 IsEmpty]: Start isEmpty. Operand 9014 states and 20836 transitions. [2021-08-21 18:56:27,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:56:27,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:27,245 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:27,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2021-08-21 18:56:27,446 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,SelfDestructingSolverStorable146 [2021-08-21 18:56:27,446 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:56:27,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:27,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1963768946, now seen corresponding path program 113 times [2021-08-21 18:56:27,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:27,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719816657] [2021-08-21 18:56:27,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:27,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:27,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:27,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719816657] [2021-08-21 18:56:27,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719816657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:27,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830772660] [2021-08-21 18:56:27,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:56:27,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:27,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:27,937 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) [2021-08-21 18:56:27,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-21 18:56:32,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:56:32,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:32,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:56:32,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:33,048 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:56:33,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-21 18:56:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:33,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830772660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:33,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:33,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:56:33,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998185192] [2021-08-21 18:56:33,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:56:33,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:33,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:56:33,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:56:33,100 INFO L87 Difference]: Start difference. First operand 9014 states and 20836 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-08-21 18:56:36,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:36,678 INFO L93 Difference]: Finished difference Result 9871 states and 22312 transitions. [2021-08-21 18:56:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 18:56:36,679 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:56:36,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:36,693 INFO L225 Difference]: With dead ends: 9871 [2021-08-21 18:56:36,693 INFO L226 Difference]: Without dead ends: 9866 [2021-08-21 18:56:36,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 3148.7ms TimeCoverageRelationStatistics Valid=495, Invalid=4335, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 18:56:36,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9866 states. [2021-08-21 18:56:36,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9866 to 9019. [2021-08-21 18:56:36,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9019 states, 9018 states have (on average 2.3115990241738746) internal successors, (20846), 9018 states have internal predecessors, (20846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:36,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9019 states to 9019 states and 20846 transitions. [2021-08-21 18:56:36,818 INFO L78 Accepts]: Start accepts. Automaton has 9019 states and 20846 transitions. Word has length 30 [2021-08-21 18:56:36,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:36,818 INFO L470 AbstractCegarLoop]: Abstraction has 9019 states and 20846 transitions. [2021-08-21 18:56:36,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-08-21 18:56:36,818 INFO L276 IsEmpty]: Start isEmpty. Operand 9019 states and 20846 transitions. [2021-08-21 18:56:36,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:56:36,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:36,828 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:36,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:37,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:37,030 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:56:37,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:37,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1416094734, now seen corresponding path program 114 times [2021-08-21 18:56:37,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:37,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49300308] [2021-08-21 18:56:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:37,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:37,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:37,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49300308] [2021-08-21 18:56:37,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49300308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:37,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522242193] [2021-08-21 18:56:37,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:56:37,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:37,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:37,325 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) [2021-08-21 18:56:37,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-21 18:56:41,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:56:41,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:41,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:56:41,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:42,550 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-08-21 18:56:42,550 INFO L388 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 41 treesize of output 53 [2021-08-21 18:56:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:42,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522242193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:42,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:42,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:56:42,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886935077] [2021-08-21 18:56:42,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:56:42,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:42,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:56:42,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:56:42,712 INFO L87 Difference]: Start difference. First operand 9019 states and 20846 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-08-21 18:56:44,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:44,819 INFO L93 Difference]: Finished difference Result 12768 states and 29104 transitions. [2021-08-21 18:56:44,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:56:44,820 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 30 [2021-08-21 18:56:44,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:44,843 INFO L225 Difference]: With dead ends: 12768 [2021-08-21 18:56:44,843 INFO L226 Difference]: Without dead ends: 12758 [2021-08-21 18:56:44,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1662.6ms TimeCoverageRelationStatistics Valid=527, Invalid=2229, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:56:44,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12758 states. [2021-08-21 18:56:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12758 to 9021. [2021-08-21 18:56:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9021 states, 9020 states have (on average 2.311751662971175) internal successors, (20852), 9020 states have internal predecessors, (20852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:45,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9021 states to 9021 states and 20852 transitions. [2021-08-21 18:56:45,013 INFO L78 Accepts]: Start accepts. Automaton has 9021 states and 20852 transitions. Word has length 30 [2021-08-21 18:56:45,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:45,013 INFO L470 AbstractCegarLoop]: Abstraction has 9021 states and 20852 transitions. [2021-08-21 18:56:45,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-08-21 18:56:45,014 INFO L276 IsEmpty]: Start isEmpty. Operand 9021 states and 20852 transitions. [2021-08-21 18:56:45,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:56:45,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:45,024 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:45,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-08-21 18:56:45,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:45,225 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:56:45,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:45,225 INFO L82 PathProgramCache]: Analyzing trace with hash 758813582, now seen corresponding path program 115 times [2021-08-21 18:56:45,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:45,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734298133] [2021-08-21 18:56:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:45,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:45,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:45,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734298133] [2021-08-21 18:56:45,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734298133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:45,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481966579] [2021-08-21 18:56:45,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:56:45,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:45,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:45,570 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) [2021-08-21 18:56:45,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-21 18:56:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:50,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:56:50,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:50,947 INFO L354 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2021-08-21 18:56:50,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 72 [2021-08-21 18:56:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:51,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481966579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:51,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:51,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:56:51,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203516208] [2021-08-21 18:56:51,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:56:51,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:51,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:56:51,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:56:51,685 INFO L87 Difference]: Start difference. First operand 9021 states and 20852 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) [2021-08-21 18:56:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:55,683 INFO L93 Difference]: Finished difference Result 12388 states and 28705 transitions. [2021-08-21 18:56:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-21 18:56:55,683 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 30 [2021-08-21 18:56:55,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:55,703 INFO L225 Difference]: With dead ends: 12388 [2021-08-21 18:56:55,703 INFO L226 Difference]: Without dead ends: 12370 [2021-08-21 18:56:55,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 3616.5ms TimeCoverageRelationStatistics Valid=780, Invalid=4920, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 18:56:55,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12370 states. [2021-08-21 18:56:55,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12370 to 9072. [2021-08-21 18:56:55,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9072 states, 9071 states have (on average 2.31231396758902) internal successors, (20975), 9071 states have internal predecessors, (20975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:55,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9072 states to 9072 states and 20975 transitions. [2021-08-21 18:56:55,853 INFO L78 Accepts]: Start accepts. Automaton has 9072 states and 20975 transitions. Word has length 30 [2021-08-21 18:56:55,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:55,853 INFO L470 AbstractCegarLoop]: Abstraction has 9072 states and 20975 transitions. [2021-08-21 18:56:55,853 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) [2021-08-21 18:56:55,853 INFO L276 IsEmpty]: Start isEmpty. Operand 9072 states and 20975 transitions. [2021-08-21 18:56:55,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:56:55,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:55,864 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:55,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2021-08-21 18:56:56,065 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,SelfDestructingSolverStorable149 [2021-08-21 18:56:56,065 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:56:56,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:56,065 INFO L82 PathProgramCache]: Analyzing trace with hash -698159406, now seen corresponding path program 116 times [2021-08-21 18:56:56,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:56,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030600307] [2021-08-21 18:56:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:56,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:56,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:56,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030600307] [2021-08-21 18:56:56,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030600307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:56,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241131364] [2021-08-21 18:56:56,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:56:56,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:56,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:56,373 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) [2021-08-21 18:56:56,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-21 18:57:01,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:57:01,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:01,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:57:01,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:01,682 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-08-21 18:57:01,682 INFO L388 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 39 treesize of output 51 [2021-08-21 18:57:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:57:02,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241131364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:02,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:02,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:57:02,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793027059] [2021-08-21 18:57:02,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:57:02,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:02,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:57:02,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:57:02,028 INFO L87 Difference]: Start difference. First operand 9072 states and 20975 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:04,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:04,645 INFO L93 Difference]: Finished difference Result 11691 states and 26797 transitions. [2021-08-21 18:57:04,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:57:04,645 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:57:04,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:04,666 INFO L225 Difference]: With dead ends: 11691 [2021-08-21 18:57:04,666 INFO L226 Difference]: Without dead ends: 11681 [2021-08-21 18:57:04,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 2118.1ms TimeCoverageRelationStatistics Valid=460, Invalid=2846, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 18:57:04,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11681 states. [2021-08-21 18:57:04,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11681 to 9067. [2021-08-21 18:57:04,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9067 states, 9066 states have (on average 2.3121553055371717) internal successors, (20962), 9066 states have internal predecessors, (20962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9067 states to 9067 states and 20962 transitions. [2021-08-21 18:57:04,815 INFO L78 Accepts]: Start accepts. Automaton has 9067 states and 20962 transitions. Word has length 30 [2021-08-21 18:57:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:04,815 INFO L470 AbstractCegarLoop]: Abstraction has 9067 states and 20962 transitions. [2021-08-21 18:57:04,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:04,815 INFO L276 IsEmpty]: Start isEmpty. Operand 9067 states and 20962 transitions. [2021-08-21 18:57:04,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:57:04,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:04,826 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:04,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-08-21 18:57:05,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:05,026 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:57:05,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:05,027 INFO L82 PathProgramCache]: Analyzing trace with hash 400961362, now seen corresponding path program 117 times [2021-08-21 18:57:05,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:05,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900063397] [2021-08-21 18:57:05,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:05,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:57:05,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:05,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900063397] [2021-08-21 18:57:05,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900063397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:05,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953672170] [2021-08-21 18:57:05,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:57:05,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:05,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:05,397 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) [2021-08-21 18:57:05,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-21 18:57:10,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:57:10,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:10,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:57:10,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:10,708 INFO L354 Elim1Store]: treesize reduction 16, result has 75.4 percent of original size [2021-08-21 18:57:10,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 69 [2021-08-21 18:57:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:57:11,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953672170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:11,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:11,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:57:11,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002953921] [2021-08-21 18:57:11,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:57:11,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:11,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:57:11,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:57:11,239 INFO L87 Difference]: Start difference. First operand 9067 states and 20962 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) [2021-08-21 18:57:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:12,851 INFO L93 Difference]: Finished difference Result 10978 states and 26036 transitions. [2021-08-21 18:57:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:57:12,851 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 30 [2021-08-21 18:57:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:12,868 INFO L225 Difference]: With dead ends: 10978 [2021-08-21 18:57:12,868 INFO L226 Difference]: Without dead ends: 10968 [2021-08-21 18:57:12,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1490.8ms TimeCoverageRelationStatistics Valid=298, Invalid=1682, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:57:12,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10968 states. [2021-08-21 18:57:12,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10968 to 9077. [2021-08-21 18:57:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9077 states, 9076 states have (on average 2.3122520934332305) internal successors, (20986), 9076 states have internal predecessors, (20986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:13,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9077 states to 9077 states and 20986 transitions. [2021-08-21 18:57:13,013 INFO L78 Accepts]: Start accepts. Automaton has 9077 states and 20986 transitions. Word has length 30 [2021-08-21 18:57:13,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:13,013 INFO L470 AbstractCegarLoop]: Abstraction has 9077 states and 20986 transitions. [2021-08-21 18:57:13,013 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) [2021-08-21 18:57:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 9077 states and 20986 transitions. [2021-08-21 18:57:13,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:57:13,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:13,024 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:13,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:13,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:13,225 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:57:13,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:13,225 INFO L82 PathProgramCache]: Analyzing trace with hash 173939402, now seen corresponding path program 118 times [2021-08-21 18:57:13,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:13,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518349277] [2021-08-21 18:57:13,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:13,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:57:13,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:13,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518349277] [2021-08-21 18:57:13,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518349277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:13,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629715483] [2021-08-21 18:57:13,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:57:13,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:13,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:13,654 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) [2021-08-21 18:57:13,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-21 18:57:18,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:57:18,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:18,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:57:18,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:19,051 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:57:19,051 INFO L388 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 34 treesize of output 25 [2021-08-21 18:57:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:57:19,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629715483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:19,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:19,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:57:19,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12415005] [2021-08-21 18:57:19,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:57:19,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:19,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:57:19,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:57:19,117 INFO L87 Difference]: Start difference. First operand 9077 states and 20986 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:57:20,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:20,519 INFO L93 Difference]: Finished difference Result 11714 states and 26853 transitions. [2021-08-21 18:57:20,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:57:20,520 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-08-21 18:57:20,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:20,540 INFO L225 Difference]: With dead ends: 11714 [2021-08-21 18:57:20,540 INFO L226 Difference]: Without dead ends: 11709 [2021-08-21 18:57:20,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1211.8ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:57:20,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11709 states. [2021-08-21 18:57:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11709 to 9078. [2021-08-21 18:57:20,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9078 states, 9077 states have (on average 2.312438030186185) internal successors, (20990), 9077 states have internal predecessors, (20990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:20,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9078 states to 9078 states and 20990 transitions. [2021-08-21 18:57:20,700 INFO L78 Accepts]: Start accepts. Automaton has 9078 states and 20990 transitions. Word has length 30 [2021-08-21 18:57:20,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:20,700 INFO L470 AbstractCegarLoop]: Abstraction has 9078 states and 20990 transitions. [2021-08-21 18:57:20,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-08-21 18:57:20,700 INFO L276 IsEmpty]: Start isEmpty. Operand 9078 states and 20990 transitions. [2021-08-21 18:57:20,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:57:20,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:20,711 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:20,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:20,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:20,911 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:57:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:20,912 INFO L82 PathProgramCache]: Analyzing trace with hash -2013457846, now seen corresponding path program 119 times [2021-08-21 18:57:20,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:20,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745632092] [2021-08-21 18:57:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:20,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:57:21,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:21,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745632092] [2021-08-21 18:57:21,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745632092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:21,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169607528] [2021-08-21 18:57:21,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:57:21,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:21,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:21,394 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) [2021-08-21 18:57:21,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-21 18:57:26,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:57:26,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:26,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:57:26,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:26,933 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:57:26,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 25 [2021-08-21 18:57:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:57:26,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169607528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:26,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:26,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:57:26,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745134397] [2021-08-21 18:57:26,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:57:26,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:26,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:57:26,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:57:26,996 INFO L87 Difference]: Start difference. First operand 9078 states and 20990 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-08-21 18:57:31,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:31,434 INFO L93 Difference]: Finished difference Result 9946 states and 22500 transitions. [2021-08-21 18:57:31,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 18:57:31,434 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:57:31,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:31,450 INFO L225 Difference]: With dead ends: 9946 [2021-08-21 18:57:31,450 INFO L226 Difference]: Without dead ends: 9941 [2021-08-21 18:57:31,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 4025.0ms TimeCoverageRelationStatistics Valid=465, Invalid=3567, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 18:57:31,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9941 states. [2021-08-21 18:57:31,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9941 to 9095. [2021-08-21 18:57:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9095 states, 9094 states have (on average 2.313173521002859) internal successors, (21036), 9094 states have internal predecessors, (21036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:31,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9095 states to 9095 states and 21036 transitions. [2021-08-21 18:57:31,611 INFO L78 Accepts]: Start accepts. Automaton has 9095 states and 21036 transitions. Word has length 30 [2021-08-21 18:57:31,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:31,611 INFO L470 AbstractCegarLoop]: Abstraction has 9095 states and 21036 transitions. [2021-08-21 18:57:31,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-08-21 18:57:31,611 INFO L276 IsEmpty]: Start isEmpty. Operand 9095 states and 21036 transitions. [2021-08-21 18:57:31,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:57:31,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:31,622 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:31,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:31,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:31,823 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:57:31,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:31,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1366405834, now seen corresponding path program 120 times [2021-08-21 18:57:31,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:31,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300986410] [2021-08-21 18:57:31,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:31,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:57:32,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:32,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300986410] [2021-08-21 18:57:32,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300986410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:32,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934298384] [2021-08-21 18:57:32,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:57:32,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:32,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:32,150 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) [2021-08-21 18:57:32,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-21 18:57:37,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:57:37,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:37,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 18:57:37,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:37,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:57:37,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 41 treesize of output 85 [2021-08-21 18:57:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:57:41,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934298384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:41,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:41,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-08-21 18:57:41,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684633632] [2021-08-21 18:57:41,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:57:41,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:41,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:57:41,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:57:41,650 INFO L87 Difference]: Start difference. First operand 9095 states and 21036 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) [2021-08-21 18:57:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:45,447 INFO L93 Difference]: Finished difference Result 12861 states and 29315 transitions. [2021-08-21 18:57:45,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 18:57:45,448 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 30 [2021-08-21 18:57:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:45,469 INFO L225 Difference]: With dead ends: 12861 [2021-08-21 18:57:45,469 INFO L226 Difference]: Without dead ends: 12851 [2021-08-21 18:57:45,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 3061.6ms TimeCoverageRelationStatistics Valid=773, Invalid=3649, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 18:57:45,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12851 states. [2021-08-21 18:57:45,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12851 to 9095. [2021-08-21 18:57:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9095 states, 9094 states have (on average 2.313173521002859) internal successors, (21036), 9094 states have internal predecessors, (21036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:45,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9095 states to 9095 states and 21036 transitions. [2021-08-21 18:57:45,644 INFO L78 Accepts]: Start accepts. Automaton has 9095 states and 21036 transitions. Word has length 30 [2021-08-21 18:57:45,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:45,644 INFO L470 AbstractCegarLoop]: Abstraction has 9095 states and 21036 transitions. [2021-08-21 18:57:45,644 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) [2021-08-21 18:57:45,644 INFO L276 IsEmpty]: Start isEmpty. Operand 9095 states and 21036 transitions. [2021-08-21 18:57:45,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:57:45,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:45,656 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:45,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:45,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:45,857 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:57:45,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:45,857 INFO L82 PathProgramCache]: Analyzing trace with hash 709124682, now seen corresponding path program 121 times [2021-08-21 18:57:45,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:45,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913243271] [2021-08-21 18:57:45,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:45,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:57:46,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:46,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913243271] [2021-08-21 18:57:46,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913243271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:46,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051664789] [2021-08-21 18:57:46,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:57:46,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:46,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:46,187 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) [2021-08-21 18:57:46,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-21 18:57:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:51,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:57:51,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:51,852 INFO L354 Elim1Store]: treesize reduction 32, result has 56.2 percent of original size [2021-08-21 18:57:51,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 72 [2021-08-21 18:57:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:57:52,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051664789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:52,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:52,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:57:52,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770224802] [2021-08-21 18:57:52,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:57:52,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:52,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:57:52,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:57:52,168 INFO L87 Difference]: Start difference. First operand 9095 states and 21036 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) [2021-08-21 18:57:56,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:56,355 INFO L93 Difference]: Finished difference Result 12518 states and 28984 transitions. [2021-08-21 18:57:56,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 18:57:56,355 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 30 [2021-08-21 18:57:56,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:56,376 INFO L225 Difference]: With dead ends: 12518 [2021-08-21 18:57:56,376 INFO L226 Difference]: Without dead ends: 12500 [2021-08-21 18:57:56,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 3637.7ms TimeCoverageRelationStatistics Valid=748, Invalid=4508, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 18:57:56,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12500 states. [2021-08-21 18:57:56,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12500 to 9136. [2021-08-21 18:57:56,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9136 states, 9135 states have (on average 2.31143951833607) internal successors, (21115), 9135 states have internal predecessors, (21115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:56,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9136 states to 9136 states and 21115 transitions. [2021-08-21 18:57:56,534 INFO L78 Accepts]: Start accepts. Automaton has 9136 states and 21115 transitions. Word has length 30 [2021-08-21 18:57:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:56,534 INFO L470 AbstractCegarLoop]: Abstraction has 9136 states and 21115 transitions. [2021-08-21 18:57:56,534 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) [2021-08-21 18:57:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 9136 states and 21115 transitions. [2021-08-21 18:57:56,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:57:56,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:56,546 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:56,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2021-08-21 18:57:56,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-21 18:57:56,746 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:57:56,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:56,747 INFO L82 PathProgramCache]: Analyzing trace with hash -747848306, now seen corresponding path program 122 times [2021-08-21 18:57:56,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:56,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907563326] [2021-08-21 18:57:56,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:56,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:57:57,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:57,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907563326] [2021-08-21 18:57:57,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907563326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:57,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634181727] [2021-08-21 18:57:57,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:57:57,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:57,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:57,181 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) [2021-08-21 18:57:57,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-21 18:58:02,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:58:02,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:02,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:58:02,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:02,853 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-08-21 18:58:02,854 INFO L388 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 39 treesize of output 51 [2021-08-21 18:58:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:58:03,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634181727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:03,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:03,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:58:03,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284908787] [2021-08-21 18:58:03,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:58:03,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:03,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:58:03,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:58:03,263 INFO L87 Difference]: Start difference. First operand 9136 states and 21115 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:06,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:06,573 INFO L93 Difference]: Finished difference Result 11809 states and 27027 transitions. [2021-08-21 18:58:06,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 18:58:06,573 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:58:06,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:06,612 INFO L225 Difference]: With dead ends: 11809 [2021-08-21 18:58:06,613 INFO L226 Difference]: Without dead ends: 11799 [2021-08-21 18:58:06,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 2823.2ms TimeCoverageRelationStatistics Valid=611, Invalid=3549, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 18:58:06,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11799 states. [2021-08-21 18:58:06,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11799 to 9133. [2021-08-21 18:58:06,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9133 states, 9132 states have (on average 2.3111038107752955) internal successors, (21105), 9132 states have internal predecessors, (21105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9133 states to 9133 states and 21105 transitions. [2021-08-21 18:58:06,771 INFO L78 Accepts]: Start accepts. Automaton has 9133 states and 21105 transitions. Word has length 30 [2021-08-21 18:58:06,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:06,771 INFO L470 AbstractCegarLoop]: Abstraction has 9133 states and 21105 transitions. [2021-08-21 18:58:06,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 9133 states and 21105 transitions. [2021-08-21 18:58:06,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:58:06,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:06,860 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:06,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-08-21 18:58:07,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:07,061 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:58:07,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:07,061 INFO L82 PathProgramCache]: Analyzing trace with hash 351272462, now seen corresponding path program 123 times [2021-08-21 18:58:07,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:07,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459727573] [2021-08-21 18:58:07,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:07,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:58:07,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:07,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459727573] [2021-08-21 18:58:07,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459727573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:07,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991789819] [2021-08-21 18:58:07,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:58:07,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:07,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:07,540 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) [2021-08-21 18:58:07,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 18:58:12,184 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 [2021-08-21 18:58:12,200 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:58:12,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:58:12,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:12,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:58:12,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:12,559 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-08-21 18:58:12,561 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:58:12,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2021-08-21 18:58:12,761 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,SelfDestructingSolverStorable157 [2021-08-21 18:58:12,762 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. [2021-08-21 18:58:12,763 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:58:12,763 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:58:12,763 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 18:58:12,767 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:58:12,767 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:58:12,769 INFO L202 PluginConnector]: Adding new model sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:58:12 BasicIcfg [2021-08-21 18:58:12,769 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:58:12,769 INFO L168 Benchmark]: Toolchain (without parser) took 720643.06 ms. Allocated memory was 186.6 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 167.4 MB in the beginning and 195.7 MB in the end (delta: -28.3 MB). Peak memory consumption was 2.0 GB. Max. memory is 8.0 GB. [2021-08-21 18:58:12,770 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.60 ms. Allocated memory is still 186.6 MB. Free memory is still 168.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:58:12,770 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.11 ms. Allocated memory is still 186.6 MB. Free memory was 167.3 MB in the beginning and 165.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 18:58:12,770 INFO L168 Benchmark]: Boogie Preprocessor took 21.08 ms. Allocated memory is still 186.6 MB. Free memory was 165.9 MB in the beginning and 164.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:58:12,770 INFO L168 Benchmark]: RCFGBuilder took 255.32 ms. Allocated memory is still 186.6 MB. Free memory was 164.9 MB in the beginning and 151.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 18:58:12,770 INFO L168 Benchmark]: TraceAbstraction took 720333.31 ms. Allocated memory was 186.6 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 151.4 MB in the beginning and 195.7 MB in the end (delta: -44.3 MB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. [2021-08-21 18:58:12,771 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 0.60 ms. Allocated memory is still 186.6 MB. Free memory is still 168.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 28.11 ms. Allocated memory is still 186.6 MB. Free memory was 167.3 MB in the beginning and 165.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.08 ms. Allocated memory is still 186.6 MB. Free memory was 165.9 MB in the beginning and 164.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 255.32 ms. Allocated memory is still 186.6 MB. Free memory was 164.9 MB in the beginning and 151.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 720333.31 ms. Allocated memory was 186.6 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 151.4 MB in the beginning and 195.7 MB in the end (delta: -44.3 MB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 247, positive: 220, positive conditional: 220, positive unconditional: 0, negative: 27, negative conditional: 27, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 220, positive: 220, positive conditional: 0, positive unconditional: 220, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 72, positive: 72, positive conditional: 0, positive unconditional: 72, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 72, positive: 71, positive conditional: 0, positive unconditional: 71, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 30, positive: 30, positive conditional: 0, positive unconditional: 30, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 220, positive: 148, positive conditional: 0, positive unconditional: 148, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 72, unknown conditional: 0, unknown unconditional: 72] , Statistics on independence cache: Total cache size (in pairs): 72, Positive cache size: 72, Positive conditional cache size: 0, Positive unconditional cache size: 72, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 27 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - 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 BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 720197.6ms, OverallIterations: 158, TraceHistogramMax: 3, EmptinessCheckTime: 1097.9ms, AutomataDifference: 222930.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 123.9ms, PartialOrderReductionTime: 109.1ms, HoareTripleCheckerStatistics: 4218 SDtfs, 25960 SDslu, 33823 SDs, 0 SdLazy, 88054 SolverSat, 5799 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 58798.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9569 GetRequests, 3188 SyntacticMatches, 234 SemanticMatches, 6147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89423 ImplicationChecksByTransitivity, 187636.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9848occurred in iteration=96, InterpolantAutomatonStates: 4916, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 12012.0ms AutomataMinimizationTime, 157 MinimizatonAttempts, 215958 StatesRemovedByMinimization, 157 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 546.7ms SsaConstructionTime, 2358.6ms SatisfiabilityAnalysisTime, 115594.4ms InterpolantComputationTime, 8666 NumberOfCodeBlocks, 8666 NumberOfCodeBlocksAsserted, 525 NumberOfCheckSat, 8355 ConstructedInterpolants, 261 QuantifiedInterpolants, 117379 SizeOfPredicates, 764 NumberOfNonLiveVariables, 10914 ConjunctsInSsa, 3262 ConjunctsInUnsatCore, 311 InterpolantComputations, 3 PerfectInterpolantSequences, 389/3182 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