/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 15:21:58,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 15:21:58,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 15:21:58,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 15:21:58,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 15:21:58,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 15:21:58,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 15:21:58,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 15:21:58,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 15:21:58,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 15:21:58,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 15:21:58,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-06 15:21:58,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 15:21:58,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 15:21:58,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 15:21:58,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 15:21:58,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 15:21:58,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 15:21:58,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 15:21:58,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 15:21:58,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 15:21:58,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 15:21:58,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 15:21:58,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 15:21:58,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-06 15:21:58,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-06 15:21:58,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-06 15:21:58,871 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-06 15:21:58,872 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-06 15:21:58,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-06 15:21:58,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-06 15:21:58,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-06 15:21:58,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-06 15:21:58,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-06 15:21:58,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-06 15:21:58,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-06 15:21:58,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-06 15:21:58,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-06 15:21:58,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 15:21:58,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 15:21:58,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 15:21:58,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-06 15:21:58,892 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 15:21:58,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 15:21:58,893 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 15:21:58,893 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 15:21:58,894 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 15:21:58,894 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 15:21:58,894 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 15:21:58,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 15:21:58,894 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 15:21:58,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 15:21:58,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 15:21:58,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 15:21:58,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 15:21:58,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 15:21:58,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 15:21:58,895 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 15:21:58,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 15:21:58,896 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 15:21:58,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 15:21:58,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 15:21:58,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 15:21:58,896 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 15:21:58,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 15:21:58,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:21:58,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 15:21:58,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 15:21:58,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 15:21:58,897 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 15:21:58,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 15:21:58,898 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 15:21:58,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 15:21:58,898 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 15:21:59,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 15:21:59,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 15:21:59,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 15:21:59,159 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 15:21:59,160 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 15:21:59,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun-alt.wvr.bpl [2021-08-06 15:21:59,161 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun-alt.wvr.bpl' [2021-08-06 15:21:59,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 15:21:59,181 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 15:21:59,182 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 15:21:59,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 15:21:59,182 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 15:21:59,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:21:59" (1/1) ... [2021-08-06 15:21:59,196 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:21:59" (1/1) ... [2021-08-06 15:21:59,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 15:21:59,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 15:21:59,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 15:21:59,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 15:21:59,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:21:59" (1/1) ... [2021-08-06 15:21:59,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:21:59" (1/1) ... [2021-08-06 15:21:59,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:21:59" (1/1) ... [2021-08-06 15:21:59,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:21:59" (1/1) ... [2021-08-06 15:21:59,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:21:59" (1/1) ... [2021-08-06 15:21:59,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:21:59" (1/1) ... [2021-08-06 15:21:59,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:21:59" (1/1) ... [2021-08-06 15:21:59,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 15:21:59,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 15:21:59,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 15:21:59,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 15:21:59,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:21:59" (1/1) ... [2021-08-06 15:21:59,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:21:59,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:21:59,240 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) [2021-08-06 15:21:59,256 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 [2021-08-06 15:21:59,269 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 15:21:59,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 15:21:59,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 15:21:59,269 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 15:21:59,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 15:21:59,270 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 15:21:59,270 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 15:21:59,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 15:21:59,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 15:21:59,270 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 15:21:59,271 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 15:21:59,271 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 15:21:59,272 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 15:21:59,409 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 15:21:59,410 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 15:21:59,411 INFO L202 PluginConnector]: Adding new model max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:21:59 BoogieIcfgContainer [2021-08-06 15:21:59,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 15:21:59,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 15:21:59,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 15:21:59,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 15:21:59,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:21:59" (1/2) ... [2021-08-06 15:21:59,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131927d6 and model type max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 03:21:59, skipping insertion in model container [2021-08-06 15:21:59,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:21:59" (2/2) ... [2021-08-06 15:21:59,416 INFO L111 eAbstractionObserver]: Analyzing ICFG max-fun-alt.wvr.bpl [2021-08-06 15:21:59,419 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 15:21:59,419 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 15:21:59,419 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 15:21:59,419 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 15:21:59,443 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 15:21:59,468 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 15:21:59,472 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 [2021-08-06 15:21:59,472 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 15:21:59,478 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-08-06 15:21:59,496 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:21:59,498 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:21:59,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 15:21:59,504 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:21:59,505 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:21:59,505 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:21:59,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:21:59,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1562983410, now seen corresponding path program 1 times [2021-08-06 15:21:59,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:21:59,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025481940] [2021-08-06 15:21:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:21:59,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:21:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:21:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:21:59,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:21:59,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025481940] [2021-08-06 15:21:59,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025481940] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:21:59,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:21:59,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:21:59,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491596451] [2021-08-06 15:21:59,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:21:59,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:21:59,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:21:59,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:21:59,644 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 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) [2021-08-06 15:21:59,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:21:59,669 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-08-06 15:21:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:21:59,670 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 [2021-08-06 15:21:59,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:21:59,678 INFO L225 Difference]: With dead ends: 217 [2021-08-06 15:21:59,678 INFO L226 Difference]: Without dead ends: 202 [2021-08-06 15:21:59,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:21:59,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-06 15:21:59,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-08-06 15:21:59,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:21:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-08-06 15:21:59,711 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-08-06 15:21:59,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:21:59,711 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-08-06 15:21:59,711 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) [2021-08-06 15:21:59,711 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-08-06 15:21:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 15:21:59,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:21:59,713 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] [2021-08-06 15:21:59,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 15:21:59,713 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:21:59,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:21:59,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1322843154, now seen corresponding path program 1 times [2021-08-06 15:21:59,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:21:59,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58810157] [2021-08-06 15:21:59,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:21:59,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:21:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:21:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:21:59,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:21:59,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58810157] [2021-08-06 15:21:59,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58810157] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:21:59,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:21:59,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 15:21:59,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604648366] [2021-08-06 15:21:59,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:21:59,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:21:59,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:21:59,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:21:59,759 INFO L87 Difference]: Start difference. First operand 149 states and 419 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) [2021-08-06 15:21:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:21:59,789 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-08-06 15:21:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:21:59,790 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 [2021-08-06 15:21:59,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:21:59,791 INFO L225 Difference]: With dead ends: 158 [2021-08-06 15:21:59,791 INFO L226 Difference]: Without dead ends: 158 [2021-08-06 15:21:59,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:21:59,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-06 15:21:59,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-08-06 15:21:59,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:21:59,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-08-06 15:21:59,801 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-08-06 15:21:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:21:59,801 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-08-06 15:21:59,801 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) [2021-08-06 15:21:59,801 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-08-06 15:21:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 15:21:59,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:21:59,803 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] [2021-08-06 15:21:59,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 15:21:59,803 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:21:59,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:21:59,803 INFO L82 PathProgramCache]: Analyzing trace with hash 286241452, now seen corresponding path program 1 times [2021-08-06 15:21:59,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:21:59,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734719536] [2021-08-06 15:21:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:21:59,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:21:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:21:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:21:59,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:21:59,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734719536] [2021-08-06 15:21:59,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734719536] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:21:59,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:21:59,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 15:21:59,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249354103] [2021-08-06 15:21:59,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:21:59,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:21:59,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:21:59,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:21:59,848 INFO L87 Difference]: Start difference. First operand 133 states and 374 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) [2021-08-06 15:21:59,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:21:59,897 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-08-06 15:21:59,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:21:59,897 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 [2021-08-06 15:21:59,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:21:59,898 INFO L225 Difference]: With dead ends: 183 [2021-08-06 15:21:59,898 INFO L226 Difference]: Without dead ends: 183 [2021-08-06 15:21:59,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:21:59,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-08-06 15:21:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-08-06 15:21:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:21:59,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-08-06 15:21:59,907 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-08-06 15:21:59,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:21:59,907 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-08-06 15:21:59,907 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) [2021-08-06 15:21:59,907 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-08-06 15:21:59,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:21:59,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:21:59,908 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] [2021-08-06 15:21:59,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 15:21:59,909 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:21:59,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:21:59,909 INFO L82 PathProgramCache]: Analyzing trace with hash -867206516, now seen corresponding path program 1 times [2021-08-06 15:21:59,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:21:59,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892160034] [2021-08-06 15:21:59,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:21:59,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:21:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:00,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:00,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892160034] [2021-08-06 15:22:00,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892160034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:00,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207365624] [2021-08-06 15:22:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:00,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:00,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:00,351 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) [2021-08-06 15:22:00,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 15:22:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:00,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:22:00,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:00,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-08-06 15:22:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:01,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207365624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:01,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:01,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:22:01,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169908518] [2021-08-06 15:22:01,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:22:01,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:01,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:22:01,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:22:01,095 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:01,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:01,294 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-08-06 15:22:01,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:22:01,294 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:22:01,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:01,296 INFO L225 Difference]: With dead ends: 330 [2021-08-06 15:22:01,296 INFO L226 Difference]: Without dead ends: 315 [2021-08-06 15:22:01,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 283.7ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:22:01,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-08-06 15:22:01,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-08-06 15:22:01,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:01,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-08-06 15:22:01,305 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-08-06 15:22:01,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:01,306 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-08-06 15:22:01,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:01,306 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-08-06 15:22:01,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:22:01,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:01,307 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] [2021-08-06 15:22:01,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:01,519 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 [2021-08-06 15:22:01,520 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:01,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1035015608, now seen corresponding path program 2 times [2021-08-06 15:22:01,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:01,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751038655] [2021-08-06 15:22:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:01,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:01,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:01,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751038655] [2021-08-06 15:22:01,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751038655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:01,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184353928] [2021-08-06 15:22:01,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:22:01,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:01,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:01,833 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) [2021-08-06 15:22:01,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 15:22:01,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:22:01,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:01,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:22:01,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:02,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:22:02,357 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 57 treesize of output 53 [2021-08-06 15:22:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:02,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184353928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:02,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:02,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-06 15:22:02,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136081441] [2021-08-06 15:22:02,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:22:02,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:02,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:22:02,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:22:02,865 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:03,503 INFO L93 Difference]: Finished difference Result 406 states and 1173 transitions. [2021-08-06 15:22:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 15:22:03,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:22:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:03,505 INFO L225 Difference]: With dead ends: 406 [2021-08-06 15:22:03,505 INFO L226 Difference]: Without dead ends: 391 [2021-08-06 15:22:03,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 627.1ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:22:03,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-06 15:22:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 229. [2021-08-06 15:22:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:03,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-08-06 15:22:03,512 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-08-06 15:22:03,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:03,513 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-08-06 15:22:03,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:03,513 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-08-06 15:22:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:22:03,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:03,514 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] [2021-08-06 15:22:03,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-06 15:22:03,730 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 [2021-08-06 15:22:03,730 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:03,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:03,731 INFO L82 PathProgramCache]: Analyzing trace with hash -736242160, now seen corresponding path program 3 times [2021-08-06 15:22:03,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:03,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93749877] [2021-08-06 15:22:03,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:03,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:03,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:03,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:03,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93749877] [2021-08-06 15:22:03,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93749877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:03,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121489865] [2021-08-06 15:22:03,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:22:03,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:03,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:03,878 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) [2021-08-06 15:22:03,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 15:22:03,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:22:03,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:03,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 15:22:03,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:04,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-08-06 15:22:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:04,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121489865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:04,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:04,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 15:22:04,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029991583] [2021-08-06 15:22:04,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:22:04,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:04,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:22:04,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:22:04,350 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) 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) [2021-08-06 15:22:04,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:04,519 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-08-06 15:22:04,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:22:04,520 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) 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 22 [2021-08-06 15:22:04,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:04,522 INFO L225 Difference]: With dead ends: 363 [2021-08-06 15:22:04,522 INFO L226 Difference]: Without dead ends: 348 [2021-08-06 15:22:04,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:22:04,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-08-06 15:22:04,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-08-06 15:22:04,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:04,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-08-06 15:22:04,528 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-08-06 15:22:04,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:04,529 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-08-06 15:22:04,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) 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) [2021-08-06 15:22:04,529 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-08-06 15:22:04,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:22:04,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:04,530 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] [2021-08-06 15:22:04,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:04,744 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 [2021-08-06 15:22:04,744 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:04,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:04,744 INFO L82 PathProgramCache]: Analyzing trace with hash 834583440, now seen corresponding path program 4 times [2021-08-06 15:22:04,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:04,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74346327] [2021-08-06 15:22:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:04,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:04,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:04,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74346327] [2021-08-06 15:22:04,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74346327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:04,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995612325] [2021-08-06 15:22:04,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:22:04,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:04,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:04,897 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) [2021-08-06 15:22:04,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 15:22:05,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:22:05,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:05,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:22:05,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:05,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:22:05,382 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 51 treesize of output 47 [2021-08-06 15:22:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:05,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995612325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:05,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:05,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:22:05,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797630353] [2021-08-06 15:22:05,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:05,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:05,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:05,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:05,741 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-08-06 15:22:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:05,986 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-08-06 15:22:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:22:05,987 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 22 [2021-08-06 15:22:05,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:05,988 INFO L225 Difference]: With dead ends: 425 [2021-08-06 15:22:05,988 INFO L226 Difference]: Without dead ends: 410 [2021-08-06 15:22:05,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:22:05,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-06 15:22:06,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-08-06 15:22:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-08-06 15:22:06,013 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-08-06 15:22:06,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:06,013 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-08-06 15:22:06,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-08-06 15:22:06,014 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-08-06 15:22:06,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:06,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:06,014 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] [2021-08-06 15:22:06,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:06,236 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 [2021-08-06 15:22:06,237 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:06,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:06,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1176864790, now seen corresponding path program 5 times [2021-08-06 15:22:06,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:06,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299138827] [2021-08-06 15:22:06,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:06,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:06,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:06,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299138827] [2021-08-06 15:22:06,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299138827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:06,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262251229] [2021-08-06 15:22:06,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:22:06,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:06,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:06,330 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) [2021-08-06 15:22:06,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 15:22:06,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:22:06,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:06,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:06,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:06,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262251229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:06,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:06,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:22:06,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720015574] [2021-08-06 15:22:06,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:22:06,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:22:06,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:22:06,737 INFO L87 Difference]: Start difference. First operand 247 states and 718 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) [2021-08-06 15:22:07,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:07,068 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-08-06 15:22:07,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:22:07,069 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 24 [2021-08-06 15:22:07,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:07,072 INFO L225 Difference]: With dead ends: 619 [2021-08-06 15:22:07,072 INFO L226 Difference]: Without dead ends: 619 [2021-08-06 15:22:07,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:22:07,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-08-06 15:22:07,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-08-06 15:22:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-08-06 15:22:07,080 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-08-06 15:22:07,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:07,088 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-08-06 15:22:07,089 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) [2021-08-06 15:22:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-08-06 15:22:07,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:07,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:07,090 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] [2021-08-06 15:22:07,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:07,307 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 [2021-08-06 15:22:07,308 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:07,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:07,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2141783662, now seen corresponding path program 6 times [2021-08-06 15:22:07,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:07,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550677145] [2021-08-06 15:22:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:07,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:07,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:07,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550677145] [2021-08-06 15:22:07,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550677145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:07,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232124845] [2021-08-06 15:22:07,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:22:07,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:07,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:07,356 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) [2021-08-06 15:22:07,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 15:22:07,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:22:07,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:07,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:07,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:07,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232124845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:07,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:07,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:22:07,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746923137] [2021-08-06 15:22:07,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:07,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:07,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:07,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:07,745 INFO L87 Difference]: Start difference. First operand 297 states and 903 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) [2021-08-06 15:22:08,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:08,553 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-08-06 15:22:08,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 15:22:08,553 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:08,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:08,557 INFO L225 Difference]: With dead ends: 1078 [2021-08-06 15:22:08,557 INFO L226 Difference]: Without dead ends: 1078 [2021-08-06 15:22:08,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 461.5ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:22:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-08-06 15:22:08,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-08-06 15:22:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:08,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-08-06 15:22:08,570 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-08-06 15:22:08,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:08,570 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-08-06 15:22:08,570 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) [2021-08-06 15:22:08,570 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-08-06 15:22:08,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:08,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:08,581 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] [2021-08-06 15:22:08,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:08,797 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 [2021-08-06 15:22:08,798 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:08,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:08,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1586231554, now seen corresponding path program 7 times [2021-08-06 15:22:08,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:08,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584773709] [2021-08-06 15:22:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:08,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:08,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:08,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584773709] [2021-08-06 15:22:08,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584773709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:08,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084641942] [2021-08-06 15:22:08,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:22:08,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:08,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:08,856 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) [2021-08-06 15:22:08,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 15:22:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:09,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:09,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:09,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084641942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:09,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:09,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:22:09,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451731336] [2021-08-06 15:22:09,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:09,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:09,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:09,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:09,264 INFO L87 Difference]: Start difference. First operand 302 states and 928 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) [2021-08-06 15:22:09,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:09,980 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-08-06 15:22:09,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:22:09,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:09,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:09,984 INFO L225 Difference]: With dead ends: 951 [2021-08-06 15:22:09,984 INFO L226 Difference]: Without dead ends: 951 [2021-08-06 15:22:09,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 417.9ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:22:09,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-08-06 15:22:09,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-08-06 15:22:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:09,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-08-06 15:22:09,997 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-08-06 15:22:09,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:09,998 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-08-06 15:22:09,999 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) [2021-08-06 15:22:09,999 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-08-06 15:22:09,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:09,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:09,999 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] [2021-08-06 15:22:10,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:10,216 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 [2021-08-06 15:22:10,216 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:10,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:10,217 INFO L82 PathProgramCache]: Analyzing trace with hash -650092882, now seen corresponding path program 1 times [2021-08-06 15:22:10,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:10,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312755820] [2021-08-06 15:22:10,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:10,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:22:10,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:10,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312755820] [2021-08-06 15:22:10,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312755820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:10,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867752889] [2021-08-06 15:22:10,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:10,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:10,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:10,273 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) [2021-08-06 15:22:10,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 15:22:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:10,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:22:10,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:22:10,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867752889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:10,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:10,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 15:22:10,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774605353] [2021-08-06 15:22:10,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:22:10,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:10,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:22:10,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:22:10,687 INFO L87 Difference]: Start difference. First operand 293 states and 894 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) [2021-08-06 15:22:10,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:10,786 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-08-06 15:22:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:22:10,786 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 [2021-08-06 15:22:10,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:10,790 INFO L225 Difference]: With dead ends: 669 [2021-08-06 15:22:10,790 INFO L226 Difference]: Without dead ends: 663 [2021-08-06 15:22:10,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:10,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-08-06 15:22:10,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-08-06 15:22:10,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:10,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-08-06 15:22:10,801 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-08-06 15:22:10,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:10,801 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-08-06 15:22:10,801 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) [2021-08-06 15:22:10,802 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-08-06 15:22:10,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:10,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:10,803 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] [2021-08-06 15:22:10,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-06 15:22:11,022 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 [2021-08-06 15:22:11,022 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:11,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1087061590, now seen corresponding path program 8 times [2021-08-06 15:22:11,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:11,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382633913] [2021-08-06 15:22:11,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:11,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:11,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:11,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382633913] [2021-08-06 15:22:11,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382633913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:11,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114368511] [2021-08-06 15:22:11,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:22:11,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:11,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:11,101 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) [2021-08-06 15:22:11,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 15:22:11,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:22:11,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:11,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:11,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:11,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114368511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:11,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:11,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 15:22:11,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149592917] [2021-08-06 15:22:11,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:11,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:11,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:11,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:11,554 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-08-06 15:22:11,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:11,723 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-08-06 15:22:11,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:22:11,723 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:11,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:11,726 INFO L225 Difference]: With dead ends: 710 [2021-08-06 15:22:11,726 INFO L226 Difference]: Without dead ends: 672 [2021-08-06 15:22:11,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:22:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-08-06 15:22:11,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-08-06 15:22:11,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:11,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-08-06 15:22:11,739 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-08-06 15:22:11,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:11,739 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-08-06 15:22:11,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-08-06 15:22:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-08-06 15:22:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:11,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:11,740 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] [2021-08-06 15:22:11,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:11,956 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 [2021-08-06 15:22:11,957 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:11,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:11,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1793018922, now seen corresponding path program 2 times [2021-08-06 15:22:11,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:11,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059732836] [2021-08-06 15:22:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:11,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:22:12,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:12,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059732836] [2021-08-06 15:22:12,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059732836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:12,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971495280] [2021-08-06 15:22:12,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:22:12,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:12,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:12,017 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) [2021-08-06 15:22:12,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 15:22:12,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:22:12,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:12,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:22:12,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:22:12,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971495280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:12,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:12,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 15:22:12,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050268934] [2021-08-06 15:22:12,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:22:12,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:12,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:22:12,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:22:12,433 INFO L87 Difference]: Start difference. First operand 515 states and 1633 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) [2021-08-06 15:22:12,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:12,533 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-08-06 15:22:12,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:22:12,533 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 [2021-08-06 15:22:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:12,536 INFO L225 Difference]: With dead ends: 830 [2021-08-06 15:22:12,536 INFO L226 Difference]: Without dead ends: 830 [2021-08-06 15:22:12,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:12,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-08-06 15:22:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-08-06 15:22:12,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-08-06 15:22:12,549 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-08-06 15:22:12,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:12,549 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-08-06 15:22:12,549 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) [2021-08-06 15:22:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-08-06 15:22:12,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:12,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:12,550 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] [2021-08-06 15:22:12,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-06 15:22:12,764 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 [2021-08-06 15:22:12,765 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:12,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:12,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1155266808, now seen corresponding path program 9 times [2021-08-06 15:22:12,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:12,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682510730] [2021-08-06 15:22:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:12,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:12,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:12,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682510730] [2021-08-06 15:22:12,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682510730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:12,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241133677] [2021-08-06 15:22:12,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:22:12,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:12,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:12,838 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) [2021-08-06 15:22:12,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 15:22:13,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:22:13,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:13,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:13,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:13,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241133677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:13,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:13,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:22:13,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025416853] [2021-08-06 15:22:13,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:22:13,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:13,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:22:13,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:22:13,184 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-08-06 15:22:13,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:13,449 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-08-06 15:22:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:22:13,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 [2021-08-06 15:22:13,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:13,454 INFO L225 Difference]: With dead ends: 1196 [2021-08-06 15:22:13,454 INFO L226 Difference]: Without dead ends: 1196 [2021-08-06 15:22:13,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:22:13,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-08-06 15:22:13,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-08-06 15:22:13,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:13,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-08-06 15:22:13,469 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-08-06 15:22:13,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:13,470 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-08-06 15:22:13,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-08-06 15:22:13,470 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-08-06 15:22:13,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:13,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:13,471 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] [2021-08-06 15:22:13,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-06 15:22:13,687 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 [2021-08-06 15:22:13,688 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:13,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1940180902, now seen corresponding path program 10 times [2021-08-06 15:22:13,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:13,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868888438] [2021-08-06 15:22:13,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:13,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:13,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:13,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868888438] [2021-08-06 15:22:13,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868888438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:13,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450627291] [2021-08-06 15:22:13,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:22:13,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:13,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:13,738 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) [2021-08-06 15:22:13,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 15:22:13,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:22:13,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:13,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:13,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:14,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450627291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:14,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:14,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:22:14,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601732589] [2021-08-06 15:22:14,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:22:14,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:14,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:22:14,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:22:14,151 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-08-06 15:22:14,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:14,520 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-08-06 15:22:14,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 15:22:14,520 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 [2021-08-06 15:22:14,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:14,525 INFO L225 Difference]: With dead ends: 1492 [2021-08-06 15:22:14,525 INFO L226 Difference]: Without dead ends: 1492 [2021-08-06 15:22:14,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:22:14,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-08-06 15:22:14,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-08-06 15:22:14,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:14,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-08-06 15:22:14,544 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-08-06 15:22:14,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:14,545 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-08-06 15:22:14,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-08-06 15:22:14,545 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-08-06 15:22:14,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:14,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:14,546 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] [2021-08-06 15:22:14,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:14,763 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 [2021-08-06 15:22:14,763 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:14,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:14,763 INFO L82 PathProgramCache]: Analyzing trace with hash 857158246, now seen corresponding path program 11 times [2021-08-06 15:22:14,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:14,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598845249] [2021-08-06 15:22:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:14,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:14,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:14,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598845249] [2021-08-06 15:22:14,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598845249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:14,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208298835] [2021-08-06 15:22:14,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:22:14,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:14,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:14,842 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) [2021-08-06 15:22:14,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 15:22:15,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:22:15,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:15,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:15,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:15,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208298835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:15,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:15,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 15:22:15,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123736150] [2021-08-06 15:22:15,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:15,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:15,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:15,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:15,314 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-08-06 15:22:15,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:15,546 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-08-06 15:22:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:22:15,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:15,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:15,552 INFO L225 Difference]: With dead ends: 1258 [2021-08-06 15:22:15,552 INFO L226 Difference]: Without dead ends: 1248 [2021-08-06 15:22:15,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:22:15,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-08-06 15:22:15,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-08-06 15:22:15,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-08-06 15:22:15,572 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-08-06 15:22:15,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:15,572 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-08-06 15:22:15,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-08-06 15:22:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-08-06 15:22:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:15,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:15,573 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] [2021-08-06 15:22:15,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:15,791 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 [2021-08-06 15:22:15,791 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:15,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:15,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1966730932, now seen corresponding path program 12 times [2021-08-06 15:22:15,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:15,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112394503] [2021-08-06 15:22:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:15,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:15,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:15,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112394503] [2021-08-06 15:22:15,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112394503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:15,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528606838] [2021-08-06 15:22:15,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:22:15,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:15,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:15,842 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) [2021-08-06 15:22:15,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 15:22:16,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:22:16,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:16,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:16,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:16,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528606838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:16,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:16,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 15:22:16,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763069832] [2021-08-06 15:22:16,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:16,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:16,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:16,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:16,319 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:16,551 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-08-06 15:22:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:22:16,551 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:16,556 INFO L225 Difference]: With dead ends: 1329 [2021-08-06 15:22:16,556 INFO L226 Difference]: Without dead ends: 1329 [2021-08-06 15:22:16,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:22:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-08-06 15:22:16,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-08-06 15:22:16,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:16,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-08-06 15:22:16,572 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-08-06 15:22:16,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:16,573 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-08-06 15:22:16,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:16,573 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-08-06 15:22:16,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:16,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:16,574 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] [2021-08-06 15:22:16,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:16,791 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 [2021-08-06 15:22:16,791 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:16,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:16,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1895359760, now seen corresponding path program 13 times [2021-08-06 15:22:16,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:16,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273323080] [2021-08-06 15:22:16,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:16,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:16,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:16,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273323080] [2021-08-06 15:22:16,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273323080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:16,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362845450] [2021-08-06 15:22:16,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:22:16,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:16,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:16,858 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) [2021-08-06 15:22:16,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 15:22:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:17,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:17,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:17,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362845450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:17,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:17,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:22:17,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254796832] [2021-08-06 15:22:17,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:22:17,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:17,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:22:17,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:22:17,309 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-08-06 15:22:17,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:17,623 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-08-06 15:22:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:22:17,624 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 [2021-08-06 15:22:17,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:17,629 INFO L225 Difference]: With dead ends: 1548 [2021-08-06 15:22:17,629 INFO L226 Difference]: Without dead ends: 1544 [2021-08-06 15:22:17,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:22:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-08-06 15:22:17,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-08-06 15:22:17,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-08-06 15:22:17,647 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-08-06 15:22:17,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:17,647 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-08-06 15:22:17,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-08-06 15:22:17,647 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-08-06 15:22:17,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:17,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:17,648 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] [2021-08-06 15:22:17,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-06 15:22:17,875 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 [2021-08-06 15:22:17,875 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:17,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:17,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1623350570, now seen corresponding path program 14 times [2021-08-06 15:22:17,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:17,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110657170] [2021-08-06 15:22:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:17,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:17,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:17,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110657170] [2021-08-06 15:22:17,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110657170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:17,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403478771] [2021-08-06 15:22:17,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:22:17,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:17,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:17,930 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) [2021-08-06 15:22:17,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 15:22:18,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:22:18,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:18,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:18,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:18,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403478771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:18,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:18,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:22:18,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422690937] [2021-08-06 15:22:18,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:18,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:18,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:18,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:18,399 INFO L87 Difference]: Start difference. First operand 772 states and 2471 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) [2021-08-06 15:22:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:19,053 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-08-06 15:22:19,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:22:19,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:19,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:19,063 INFO L225 Difference]: With dead ends: 2734 [2021-08-06 15:22:19,063 INFO L226 Difference]: Without dead ends: 2734 [2021-08-06 15:22:19,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 394.7ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:22:19,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-08-06 15:22:19,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-08-06 15:22:19,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:19,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-08-06 15:22:19,096 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-08-06 15:22:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:19,096 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-08-06 15:22:19,096 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) [2021-08-06 15:22:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-08-06 15:22:19,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:19,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:19,098 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] [2021-08-06 15:22:19,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:19,315 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 [2021-08-06 15:22:19,315 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:19,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:19,316 INFO L82 PathProgramCache]: Analyzing trace with hash -2104664646, now seen corresponding path program 15 times [2021-08-06 15:22:19,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:19,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506753474] [2021-08-06 15:22:19,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:19,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:19,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:19,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506753474] [2021-08-06 15:22:19,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506753474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:19,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74114992] [2021-08-06 15:22:19,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:22:19,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:19,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:19,361 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) [2021-08-06 15:22:19,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 15:22:19,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:22:19,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:19,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:19,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:19,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74114992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:19,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:19,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:22:19,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338740681] [2021-08-06 15:22:19,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:19,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:19,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:19,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:19,855 INFO L87 Difference]: Start difference. First operand 841 states and 2781 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) [2021-08-06 15:22:20,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:20,535 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-08-06 15:22:20,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:22:20,536 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:20,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:20,542 INFO L225 Difference]: With dead ends: 2693 [2021-08-06 15:22:20,542 INFO L226 Difference]: Without dead ends: 2693 [2021-08-06 15:22:20,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 441.3ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:22:20,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-08-06 15:22:20,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-08-06 15:22:20,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-08-06 15:22:20,570 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-08-06 15:22:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:20,570 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-08-06 15:22:20,571 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) [2021-08-06 15:22:20,571 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-08-06 15:22:20,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:20,572 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:20,572 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] [2021-08-06 15:22:20,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-06 15:22:20,805 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 [2021-08-06 15:22:20,805 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:20,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:20,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1017956792, now seen corresponding path program 16 times [2021-08-06 15:22:20,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:20,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275413961] [2021-08-06 15:22:20,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:20,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:20,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:20,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275413961] [2021-08-06 15:22:20,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275413961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:20,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124676994] [2021-08-06 15:22:20,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:22:20,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:20,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:20,845 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) [2021-08-06 15:22:20,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 15:22:21,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:22:21,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:21,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:21,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:21,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124676994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:21,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:21,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:22:21,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105086574] [2021-08-06 15:22:21,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:22:21,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:21,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:22:21,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:22:21,300 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:21,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:21,896 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-08-06 15:22:21,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 15:22:21,897 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:21,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:21,904 INFO L225 Difference]: With dead ends: 2677 [2021-08-06 15:22:21,904 INFO L226 Difference]: Without dead ends: 2677 [2021-08-06 15:22:21,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 341.5ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:22:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-08-06 15:22:21,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-08-06 15:22:21,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-08-06 15:22:21,931 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-08-06 15:22:21,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:21,931 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-08-06 15:22:21,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:21,932 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-08-06 15:22:21,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:21,933 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:21,933 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] [2021-08-06 15:22:21,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:22,148 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 [2021-08-06 15:22:22,149 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:22,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1099332880, now seen corresponding path program 17 times [2021-08-06 15:22:22,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:22,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884846271] [2021-08-06 15:22:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:22,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:22,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:22,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884846271] [2021-08-06 15:22:22,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884846271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:22,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974423316] [2021-08-06 15:22:22,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:22:22,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:22,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:22,193 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) [2021-08-06 15:22:22,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 15:22:22,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:22:22,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:22,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:22,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:22,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974423316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:22,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:22,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:22:22,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178272485] [2021-08-06 15:22:22,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:22:22,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:22,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:22:22,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:22:22,683 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:23,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:23,145 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-08-06 15:22:23,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:22:23,145 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:23,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:23,150 INFO L225 Difference]: With dead ends: 2474 [2021-08-06 15:22:23,150 INFO L226 Difference]: Without dead ends: 2470 [2021-08-06 15:22:23,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 255.7ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:22:23,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-08-06 15:22:23,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-08-06 15:22:23,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:23,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-08-06 15:22:23,173 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-08-06 15:22:23,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:23,173 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-08-06 15:22:23,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:23,173 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-08-06 15:22:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:23,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:23,175 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] [2021-08-06 15:22:23,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:23,393 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 [2021-08-06 15:22:23,393 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:23,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:23,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2029990096, now seen corresponding path program 18 times [2021-08-06 15:22:23,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:23,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955650572] [2021-08-06 15:22:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:23,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:23,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:23,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955650572] [2021-08-06 15:22:23,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955650572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:23,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116036900] [2021-08-06 15:22:23,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:22:23,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:23,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:23,437 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) [2021-08-06 15:22:23,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 15:22:23,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:22:23,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:23,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:23,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:23,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116036900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:23,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:23,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:22:23,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132814837] [2021-08-06 15:22:23,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:23,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:23,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:23,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:23,981 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-06 15:22:24,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:24,596 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-08-06 15:22:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 15:22:24,596 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-06 15:22:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:24,602 INFO L225 Difference]: With dead ends: 2514 [2021-08-06 15:22:24,602 INFO L226 Difference]: Without dead ends: 2514 [2021-08-06 15:22:24,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 359.6ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:22:24,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-08-06 15:22:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-08-06 15:22:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:24,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-08-06 15:22:24,625 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-08-06 15:22:24,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:24,625 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-08-06 15:22:24,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-06 15:22:24,625 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-08-06 15:22:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:24,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:24,627 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] [2021-08-06 15:22:24,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:24,840 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 [2021-08-06 15:22:24,841 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:24,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:24,841 INFO L82 PathProgramCache]: Analyzing trace with hash -621938046, now seen corresponding path program 19 times [2021-08-06 15:22:24,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:24,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927182209] [2021-08-06 15:22:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:24,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:24,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:24,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927182209] [2021-08-06 15:22:24,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927182209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:24,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883206110] [2021-08-06 15:22:24,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:22:24,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:24,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:24,886 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) [2021-08-06 15:22:24,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 15:22:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:25,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:25,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:25,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883206110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:25,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:25,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:22:25,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049227687] [2021-08-06 15:22:25,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:25,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:25,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:25,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:25,422 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-06 15:22:26,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:26,017 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-08-06 15:22:26,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:22:26,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-06 15:22:26,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:26,022 INFO L225 Difference]: With dead ends: 2332 [2021-08-06 15:22:26,022 INFO L226 Difference]: Without dead ends: 2328 [2021-08-06 15:22:26,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 318.4ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:22:26,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-08-06 15:22:26,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-08-06 15:22:26,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-08-06 15:22:26,046 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-08-06 15:22:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:26,046 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-08-06 15:22:26,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-06 15:22:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-08-06 15:22:26,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:26,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:26,048 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] [2021-08-06 15:22:26,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:26,260 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 [2021-08-06 15:22:26,261 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:26,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:26,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1534223598, now seen corresponding path program 3 times [2021-08-06 15:22:26,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:26,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495150041] [2021-08-06 15:22:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:26,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:22:26,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:26,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495150041] [2021-08-06 15:22:26,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495150041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:26,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966847276] [2021-08-06 15:22:26,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:22:26,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:26,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:26,297 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) [2021-08-06 15:22:26,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 15:22:26,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:22:26,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:26,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:22:26,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:22:26,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966847276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:26,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:26,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 15:22:26,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906579842] [2021-08-06 15:22:26,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:22:26,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:26,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:22:26,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:22:26,778 INFO L87 Difference]: Start difference. First operand 853 states and 2813 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) [2021-08-06 15:22:26,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:26,854 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-08-06 15:22:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:22:26,854 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 [2021-08-06 15:22:26,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:26,856 INFO L225 Difference]: With dead ends: 929 [2021-08-06 15:22:26,856 INFO L226 Difference]: Without dead ends: 929 [2021-08-06 15:22:26,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:22:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-08-06 15:22:26,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-08-06 15:22:26,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:26,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-08-06 15:22:26,868 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-08-06 15:22:26,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:26,869 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-08-06 15:22:26,869 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) [2021-08-06 15:22:26,869 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-08-06 15:22:26,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:26,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:26,870 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] [2021-08-06 15:22:26,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:27,087 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 [2021-08-06 15:22:27,088 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:27,088 INFO L82 PathProgramCache]: Analyzing trace with hash -604023854, now seen corresponding path program 20 times [2021-08-06 15:22:27,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:27,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893546236] [2021-08-06 15:22:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:27,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:27,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:27,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893546236] [2021-08-06 15:22:27,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893546236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:27,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843304927] [2021-08-06 15:22:27,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:22:27,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:27,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:27,169 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) [2021-08-06 15:22:27,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 15:22:27,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:22:27,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:27,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:27,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:27,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843304927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:27,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:27,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 15:22:27,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407777378] [2021-08-06 15:22:27,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:22:27,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:27,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:22:27,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:22:27,695 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-08-06 15:22:27,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:27,958 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-08-06 15:22:27,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:22:27,958 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 [2021-08-06 15:22:27,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:27,961 INFO L225 Difference]: With dead ends: 1555 [2021-08-06 15:22:27,961 INFO L226 Difference]: Without dead ends: 1555 [2021-08-06 15:22:27,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:22:27,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-08-06 15:22:27,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-08-06 15:22:27,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-08-06 15:22:27,977 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-08-06 15:22:27,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:27,977 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-08-06 15:22:27,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-08-06 15:22:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-08-06 15:22:27,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:27,979 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:27,979 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] [2021-08-06 15:22:27,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:28,196 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 [2021-08-06 15:22:28,196 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:28,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:28,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1298655598, now seen corresponding path program 21 times [2021-08-06 15:22:28,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:28,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792769512] [2021-08-06 15:22:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:28,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:28,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:28,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792769512] [2021-08-06 15:22:28,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792769512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:28,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025756001] [2021-08-06 15:22:28,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:22:28,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:28,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:28,227 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) [2021-08-06 15:22:28,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 15:22:28,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:22:28,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:28,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:28,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:28,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025756001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:28,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:28,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 15:22:28,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858333742] [2021-08-06 15:22:28,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:22:28,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:28,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:22:28,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:22:28,774 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:29,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:29,005 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-08-06 15:22:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:22:29,006 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:29,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:29,008 INFO L225 Difference]: With dead ends: 1605 [2021-08-06 15:22:29,008 INFO L226 Difference]: Without dead ends: 1605 [2021-08-06 15:22:29,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:22:29,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-08-06 15:22:29,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-08-06 15:22:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-08-06 15:22:29,024 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-08-06 15:22:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:29,024 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-08-06 15:22:29,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:29,024 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-08-06 15:22:29,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:29,025 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:29,025 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] [2021-08-06 15:22:29,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:29,239 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 [2021-08-06 15:22:29,239 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:29,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:29,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1253834456, now seen corresponding path program 22 times [2021-08-06 15:22:29,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:29,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539882299] [2021-08-06 15:22:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:29,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:22:29,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:29,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539882299] [2021-08-06 15:22:29,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539882299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:29,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581068714] [2021-08-06 15:22:29,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:22:29,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:29,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:29,276 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) [2021-08-06 15:22:29,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 15:22:29,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:22:29,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:29,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:29,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:22:29,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581068714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:29,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:29,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 15:22:29,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328088078] [2021-08-06 15:22:29,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:22:29,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:29,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:22:29,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:22:29,783 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:29,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:29,970 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-08-06 15:22:29,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:22:29,970 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:29,973 INFO L225 Difference]: With dead ends: 1524 [2021-08-06 15:22:29,973 INFO L226 Difference]: Without dead ends: 1520 [2021-08-06 15:22:29,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:22:29,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-08-06 15:22:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-08-06 15:22:29,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:29,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-08-06 15:22:29,987 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-08-06 15:22:29,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:29,987 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-08-06 15:22:29,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:29,988 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-08-06 15:22:29,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:29,989 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:29,989 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] [2021-08-06 15:22:30,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:30,206 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 [2021-08-06 15:22:30,206 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:30,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:30,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1851171114, now seen corresponding path program 23 times [2021-08-06 15:22:30,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:30,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115000416] [2021-08-06 15:22:30,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:30,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:30,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:30,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115000416] [2021-08-06 15:22:30,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115000416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:30,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376521233] [2021-08-06 15:22:30,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:22:30,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:30,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:30,250 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) [2021-08-06 15:22:30,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 15:22:30,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:22:30,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:30,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:30,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:30,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376521233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:30,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:30,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 15:22:30,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374948226] [2021-08-06 15:22:30,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:22:30,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:30,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:22:30,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:22:30,798 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-08-06 15:22:31,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:31,004 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-08-06 15:22:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:22:31,005 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 [2021-08-06 15:22:31,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:31,007 INFO L225 Difference]: With dead ends: 1508 [2021-08-06 15:22:31,007 INFO L226 Difference]: Without dead ends: 1496 [2021-08-06 15:22:31,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:22:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-08-06 15:22:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-08-06 15:22:31,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-08-06 15:22:31,021 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-08-06 15:22:31,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:31,021 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-08-06 15:22:31,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-08-06 15:22:31,021 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-08-06 15:22:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:31,023 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:31,023 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] [2021-08-06 15:22:31,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:31,239 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 [2021-08-06 15:22:31,240 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:31,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:31,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1324750830, now seen corresponding path program 24 times [2021-08-06 15:22:31,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:31,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46163366] [2021-08-06 15:22:31,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:31,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:31,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:31,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46163366] [2021-08-06 15:22:31,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46163366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:31,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245786606] [2021-08-06 15:22:31,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:22:31,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:31,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:31,285 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) [2021-08-06 15:22:31,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 15:22:31,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:22:31,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:31,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:31,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:31,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245786606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:31,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:31,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:22:31,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311637926] [2021-08-06 15:22:31,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:31,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:31,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:31,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:31,897 INFO L87 Difference]: Start difference. First operand 904 states and 2959 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) [2021-08-06 15:22:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:32,409 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-08-06 15:22:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:22:32,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:32,412 INFO L225 Difference]: With dead ends: 2412 [2021-08-06 15:22:32,413 INFO L226 Difference]: Without dead ends: 2412 [2021-08-06 15:22:32,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:22:32,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-08-06 15:22:32,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-08-06 15:22:32,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:32,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-08-06 15:22:32,432 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-08-06 15:22:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:32,432 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-08-06 15:22:32,432 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) [2021-08-06 15:22:32,432 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-08-06 15:22:32,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:32,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:32,434 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] [2021-08-06 15:22:32,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:32,650 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 [2021-08-06 15:22:32,651 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:32,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:32,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1891702910, now seen corresponding path program 25 times [2021-08-06 15:22:32,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:32,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21478977] [2021-08-06 15:22:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:32,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:32,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:32,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21478977] [2021-08-06 15:22:32,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21478977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:32,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361437720] [2021-08-06 15:22:32,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:22:32,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:32,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:32,693 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) [2021-08-06 15:22:32,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 15:22:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:33,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:33,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:33,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361437720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:33,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:33,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:22:33,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734461893] [2021-08-06 15:22:33,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:33,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:33,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:33,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:33,276 INFO L87 Difference]: Start difference. First operand 960 states and 3229 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) [2021-08-06 15:22:33,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:33,721 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-08-06 15:22:33,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:22:33,721 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:33,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:33,724 INFO L225 Difference]: With dead ends: 2335 [2021-08-06 15:22:33,725 INFO L226 Difference]: Without dead ends: 2335 [2021-08-06 15:22:33,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 279.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:22:33,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-08-06 15:22:33,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-08-06 15:22:33,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:33,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-06 15:22:33,744 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-06 15:22:33,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:33,744 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-06 15:22:33,744 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) [2021-08-06 15:22:33,744 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-06 15:22:33,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:33,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:33,746 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] [2021-08-06 15:22:33,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:33,963 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 [2021-08-06 15:22:33,963 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:33,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:33,964 INFO L82 PathProgramCache]: Analyzing trace with hash 719357052, now seen corresponding path program 26 times [2021-08-06 15:22:33,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:33,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57977755] [2021-08-06 15:22:33,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:33,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:34,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:34,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57977755] [2021-08-06 15:22:34,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57977755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:34,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699255164] [2021-08-06 15:22:34,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:22:34,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:34,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:34,006 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) [2021-08-06 15:22:34,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 15:22:34,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:22:34,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:34,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:34,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:34,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699255164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:34,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:34,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:22:34,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702389775] [2021-08-06 15:22:34,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:22:34,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:34,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:22:34,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:22:34,623 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:35,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:35,011 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-08-06 15:22:35,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:22:35,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:35,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:35,015 INFO L225 Difference]: With dead ends: 2285 [2021-08-06 15:22:35,015 INFO L226 Difference]: Without dead ends: 2285 [2021-08-06 15:22:35,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:22:35,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-08-06 15:22:35,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-08-06 15:22:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-06 15:22:35,035 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-06 15:22:35,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:35,035 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-06 15:22:35,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:35,035 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-06 15:22:35,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:35,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:35,037 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] [2021-08-06 15:22:35,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-06 15:22:35,253 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 [2021-08-06 15:22:35,253 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:35,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:35,253 INFO L82 PathProgramCache]: Analyzing trace with hash 800733140, now seen corresponding path program 27 times [2021-08-06 15:22:35,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:35,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578244643] [2021-08-06 15:22:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:35,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:35,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:35,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578244643] [2021-08-06 15:22:35,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578244643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:35,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437240448] [2021-08-06 15:22:35,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:22:35,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:35,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:35,296 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) [2021-08-06 15:22:35,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 15:22:35,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:22:35,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:35,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:35,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:35,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437240448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:35,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:35,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:22:35,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889625663] [2021-08-06 15:22:35,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:22:35,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:35,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:22:35,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:22:35,932 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:36,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:36,270 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-08-06 15:22:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:22:36,270 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:36,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:36,275 INFO L225 Difference]: With dead ends: 2176 [2021-08-06 15:22:36,275 INFO L226 Difference]: Without dead ends: 2172 [2021-08-06 15:22:36,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:22:36,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-08-06 15:22:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-08-06 15:22:36,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-06 15:22:36,296 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-06 15:22:36,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:36,296 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-06 15:22:36,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:36,297 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-06 15:22:36,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:36,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:36,298 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] [2021-08-06 15:22:36,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:36,515 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 [2021-08-06 15:22:36,515 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:36,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:36,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1731390356, now seen corresponding path program 28 times [2021-08-06 15:22:36,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:36,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928428350] [2021-08-06 15:22:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:36,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:36,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:36,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928428350] [2021-08-06 15:22:36,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928428350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:36,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365747709] [2021-08-06 15:22:36,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:22:36,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:36,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:36,559 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) [2021-08-06 15:22:36,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 15:22:37,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:22:37,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:37,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:37,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:37,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365747709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:37,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:37,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:22:37,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924350562] [2021-08-06 15:22:37,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:37,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:37,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:37,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:37,147 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-06 15:22:37,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:37,412 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-08-06 15:22:37,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:22:37,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-06 15:22:37,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:37,416 INFO L225 Difference]: With dead ends: 2199 [2021-08-06 15:22:37,416 INFO L226 Difference]: Without dead ends: 2199 [2021-08-06 15:22:37,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:22:37,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-08-06 15:22:37,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-08-06 15:22:37,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-06 15:22:37,435 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-06 15:22:37,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:37,435 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-06 15:22:37,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-06 15:22:37,435 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-06 15:22:37,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:37,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:37,437 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] [2021-08-06 15:22:37,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:37,654 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 [2021-08-06 15:22:37,654 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:37,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:37,654 INFO L82 PathProgramCache]: Analyzing trace with hash -920537786, now seen corresponding path program 29 times [2021-08-06 15:22:37,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:37,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367845361] [2021-08-06 15:22:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:37,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:37,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:37,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367845361] [2021-08-06 15:22:37,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367845361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:37,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847111585] [2021-08-06 15:22:37,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:22:37,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:37,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:37,698 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) [2021-08-06 15:22:37,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 15:22:38,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:22:38,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:38,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:38,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:38,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847111585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:38,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:38,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:22:38,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986890019] [2021-08-06 15:22:38,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:38,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:38,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:38,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:38,314 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-06 15:22:38,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:38,611 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-08-06 15:22:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:22:38,611 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-06 15:22:38,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:38,614 INFO L225 Difference]: With dead ends: 2156 [2021-08-06 15:22:38,615 INFO L226 Difference]: Without dead ends: 2152 [2021-08-06 15:22:38,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:22:38,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-08-06 15:22:38,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-08-06 15:22:38,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-06 15:22:38,632 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-06 15:22:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:38,633 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-06 15:22:38,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-06 15:22:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-06 15:22:38,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:38,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:38,634 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] [2021-08-06 15:22:38,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:38,851 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 [2021-08-06 15:22:38,851 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:38,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:38,851 INFO L82 PathProgramCache]: Analyzing trace with hash 82890198, now seen corresponding path program 30 times [2021-08-06 15:22:38,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:38,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810559516] [2021-08-06 15:22:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:38,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:38,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:38,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810559516] [2021-08-06 15:22:38,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810559516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:38,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354932644] [2021-08-06 15:22:38,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:22:38,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:38,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:38,887 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) [2021-08-06 15:22:38,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 15:22:39,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:22:39,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:39,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:39,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:39,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354932644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:39,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:39,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:22:39,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144915322] [2021-08-06 15:22:39,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:22:39,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:39,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:22:39,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:22:39,511 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-08-06 15:22:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:39,783 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-08-06 15:22:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:22:39,788 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-08-06 15:22:39,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:39,791 INFO L225 Difference]: With dead ends: 2097 [2021-08-06 15:22:39,791 INFO L226 Difference]: Without dead ends: 2097 [2021-08-06 15:22:39,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:22:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-08-06 15:22:39,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-08-06 15:22:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-08-06 15:22:39,810 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-08-06 15:22:39,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:39,811 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-08-06 15:22:39,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-08-06 15:22:39,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-08-06 15:22:39,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:39,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:39,812 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] [2021-08-06 15:22:39,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:40,028 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 [2021-08-06 15:22:40,029 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:40,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:40,029 INFO L82 PathProgramCache]: Analyzing trace with hash 164266286, now seen corresponding path program 31 times [2021-08-06 15:22:40,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:40,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823315635] [2021-08-06 15:22:40,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:40,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:40,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:40,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823315635] [2021-08-06 15:22:40,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823315635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:40,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773575187] [2021-08-06 15:22:40,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:22:40,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:40,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:40,072 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) [2021-08-06 15:22:40,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 15:22:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:40,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:40,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:40,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773575187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:40,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:40,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:22:40,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192671626] [2021-08-06 15:22:40,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:22:40,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:40,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:22:40,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:22:40,693 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-08-06 15:22:40,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:40,945 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-08-06 15:22:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:22:40,946 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-08-06 15:22:40,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:40,948 INFO L225 Difference]: With dead ends: 1963 [2021-08-06 15:22:40,948 INFO L226 Difference]: Without dead ends: 1959 [2021-08-06 15:22:40,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:22:40,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-08-06 15:22:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-08-06 15:22:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-08-06 15:22:40,966 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-08-06 15:22:40,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:40,966 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-08-06 15:22:40,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-08-06 15:22:40,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-08-06 15:22:40,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:40,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:40,968 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] [2021-08-06 15:22:40,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:41,185 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 [2021-08-06 15:22:41,185 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:41,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:41,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1350825686, now seen corresponding path program 32 times [2021-08-06 15:22:41,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:41,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075897098] [2021-08-06 15:22:41,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:41,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:41,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:41,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:41,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075897098] [2021-08-06 15:22:41,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075897098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:41,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380504544] [2021-08-06 15:22:41,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:22:41,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:41,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:41,231 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) [2021-08-06 15:22:41,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 15:22:41,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:22:41,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:41,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:41,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:41,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380504544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:41,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:41,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:22:41,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968636965] [2021-08-06 15:22:41,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:22:41,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:41,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:22:41,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:22:41,873 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-08-06 15:22:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:42,041 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-08-06 15:22:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:22:42,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 24 [2021-08-06 15:22:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:42,044 INFO L225 Difference]: With dead ends: 1728 [2021-08-06 15:22:42,044 INFO L226 Difference]: Without dead ends: 1716 [2021-08-06 15:22:42,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:22:42,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-08-06 15:22:42,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-08-06 15:22:42,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-08-06 15:22:42,075 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-08-06 15:22:42,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:42,075 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-08-06 15:22:42,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-08-06 15:22:42,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-08-06 15:22:42,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:42,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:42,092 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] [2021-08-06 15:22:42,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:42,308 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 [2021-08-06 15:22:42,309 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:42,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:42,309 INFO L82 PathProgramCache]: Analyzing trace with hash 246301030, now seen corresponding path program 33 times [2021-08-06 15:22:42,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:42,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187587292] [2021-08-06 15:22:42,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:42,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:42,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:42,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187587292] [2021-08-06 15:22:42,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187587292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:42,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914633269] [2021-08-06 15:22:42,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:22:42,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:42,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:42,363 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) [2021-08-06 15:22:42,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 15:22:42,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:22:42,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:42,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:42,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:43,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914633269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:43,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:43,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:22:43,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844396561] [2021-08-06 15:22:43,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:43,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:43,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:43,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:43,007 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-06 15:22:43,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:43,212 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-08-06 15:22:43,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:22:43,212 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-06 15:22:43,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:43,215 INFO L225 Difference]: With dead ends: 1821 [2021-08-06 15:22:43,215 INFO L226 Difference]: Without dead ends: 1821 [2021-08-06 15:22:43,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:22:43,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-08-06 15:22:43,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-08-06 15:22:43,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:43,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-08-06 15:22:43,264 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-08-06 15:22:43,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:43,264 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-08-06 15:22:43,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-06 15:22:43,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-08-06 15:22:43,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:43,282 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:43,282 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] [2021-08-06 15:22:43,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:43,499 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 [2021-08-06 15:22:43,500 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:43,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:43,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1889340184, now seen corresponding path program 34 times [2021-08-06 15:22:43,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:43,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257519270] [2021-08-06 15:22:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:43,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:43,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:43,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257519270] [2021-08-06 15:22:43,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257519270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:43,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400498465] [2021-08-06 15:22:43,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:22:43,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:43,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:43,537 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) [2021-08-06 15:22:43,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 15:22:44,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:22:44,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:44,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:44,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:44,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400498465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:44,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:44,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:22:44,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065119853] [2021-08-06 15:22:44,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:44,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:44,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:44,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:44,233 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-06 15:22:44,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:44,537 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-08-06 15:22:44,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:22:44,537 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-06 15:22:44,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:44,540 INFO L225 Difference]: With dead ends: 1790 [2021-08-06 15:22:44,540 INFO L226 Difference]: Without dead ends: 1786 [2021-08-06 15:22:44,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:22:44,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-08-06 15:22:44,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-08-06 15:22:44,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:44,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-08-06 15:22:44,558 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-08-06 15:22:44,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:44,558 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-08-06 15:22:44,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-08-06 15:22:44,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-08-06 15:22:44,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:44,560 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:44,560 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] [2021-08-06 15:22:44,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:44,773 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 [2021-08-06 15:22:44,773 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:44,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:44,773 INFO L82 PathProgramCache]: Analyzing trace with hash 621883006, now seen corresponding path program 35 times [2021-08-06 15:22:44,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:44,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360135227] [2021-08-06 15:22:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:44,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:44,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:44,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360135227] [2021-08-06 15:22:44,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360135227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:44,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177746173] [2021-08-06 15:22:44,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:22:44,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:44,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:44,824 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) [2021-08-06 15:22:44,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 15:22:45,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:22:45,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:45,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:45,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:45,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177746173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:45,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:45,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:22:45,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481425762] [2021-08-06 15:22:45,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:22:45,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:45,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:22:45,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:22:45,524 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:45,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:45,700 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-08-06 15:22:45,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:22:45,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:45,703 INFO L225 Difference]: With dead ends: 1649 [2021-08-06 15:22:45,703 INFO L226 Difference]: Without dead ends: 1637 [2021-08-06 15:22:45,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:22:45,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-08-06 15:22:45,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-08-06 15:22:45,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-08-06 15:22:45,719 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-08-06 15:22:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:45,719 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-08-06 15:22:45,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:45,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-08-06 15:22:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:22:45,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:45,721 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] [2021-08-06 15:22:45,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:45,938 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 [2021-08-06 15:22:45,938 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:45,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:45,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1878950772, now seen corresponding path program 4 times [2021-08-06 15:22:45,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:45,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445134626] [2021-08-06 15:22:45,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:45,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:46,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:46,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445134626] [2021-08-06 15:22:46,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445134626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:46,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106222994] [2021-08-06 15:22:46,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:22:46,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:46,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:46,348 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) [2021-08-06 15:22:46,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 15:22:46,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:22:46,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:46,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:22:46,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:47,908 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:22:47,909 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 110 treesize of output 79 [2021-08-06 15:22:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:48,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106222994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:48,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:48,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:22:48,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695799569] [2021-08-06 15:22:48,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:22:48,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:48,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:22:48,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:22:48,020 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:49,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:49,678 INFO L93 Difference]: Finished difference Result 1599 states and 5214 transitions. [2021-08-06 15:22:49,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:22:49,678 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:22:49,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:49,681 INFO L225 Difference]: With dead ends: 1599 [2021-08-06 15:22:49,681 INFO L226 Difference]: Without dead ends: 1584 [2021-08-06 15:22:49,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1542.8ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:22:49,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-08-06 15:22:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1163. [2021-08-06 15:22:49,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 3.37263339070568) internal successors, (3919), 1162 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:49,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 3919 transitions. [2021-08-06 15:22:49,697 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 3919 transitions. Word has length 26 [2021-08-06 15:22:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:49,697 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 3919 transitions. [2021-08-06 15:22:49,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:49,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 3919 transitions. [2021-08-06 15:22:49,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:22:49,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:49,699 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] [2021-08-06 15:22:49,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:49,912 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 [2021-08-06 15:22:49,913 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:49,913 INFO L82 PathProgramCache]: Analyzing trace with hash 387618508, now seen corresponding path program 5 times [2021-08-06 15:22:49,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:49,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485617573] [2021-08-06 15:22:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:49,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:50,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:50,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485617573] [2021-08-06 15:22:50,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485617573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:50,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206448619] [2021-08-06 15:22:50,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:22:50,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:50,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:50,487 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) [2021-08-06 15:22:50,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 15:22:51,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:22:51,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:51,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:22:51,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:52,065 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:22:52,066 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 110 treesize of output 79 [2021-08-06 15:22:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:52,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206448619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:52,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:52,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:22:52,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992940155] [2021-08-06 15:22:52,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:22:52,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:52,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:22:52,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:22:52,264 INFO L87 Difference]: Start difference. First operand 1163 states and 3919 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:22:52,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:52,948 INFO L93 Difference]: Finished difference Result 1525 states and 5006 transitions. [2021-08-06 15:22:52,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:22:52,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:22:52,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:52,951 INFO L225 Difference]: With dead ends: 1525 [2021-08-06 15:22:52,951 INFO L226 Difference]: Without dead ends: 1510 [2021-08-06 15:22:52,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 700.7ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:22:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2021-08-06 15:22:52,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1180. [2021-08-06 15:22:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.3621713316369806) internal successors, (3964), 1179 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:52,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3964 transitions. [2021-08-06 15:22:52,988 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3964 transitions. Word has length 26 [2021-08-06 15:22:52,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:52,989 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 3964 transitions. [2021-08-06 15:22:52,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:22:52,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3964 transitions. [2021-08-06 15:22:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:22:52,991 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:52,991 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] [2021-08-06 15:22:53,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:53,192 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 [2021-08-06 15:22:53,192 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:53,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:53,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1979047816, now seen corresponding path program 36 times [2021-08-06 15:22:53,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:53,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341843641] [2021-08-06 15:22:53,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:53,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:53,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:53,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341843641] [2021-08-06 15:22:53,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341843641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:53,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747661280] [2021-08-06 15:22:53,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:22:53,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:53,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:53,986 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) [2021-08-06 15:22:53,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 15:22:54,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:22:54,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:54,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:22:54,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:55,545 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:22:55,545 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 116 treesize of output 82 [2021-08-06 15:22:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:55,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747661280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:55,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:55,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:22:55,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485939204] [2021-08-06 15:22:55,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:22:55,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:55,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:22:55,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:22:55,660 INFO L87 Difference]: Start difference. First operand 1180 states and 3964 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-06 15:22:58,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:58,214 INFO L93 Difference]: Finished difference Result 1700 states and 5493 transitions. [2021-08-06 15:22:58,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:22:58,215 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:22:58,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:58,217 INFO L225 Difference]: With dead ends: 1700 [2021-08-06 15:22:58,217 INFO L226 Difference]: Without dead ends: 1685 [2021-08-06 15:22:58,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 2463.7ms TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:22:58,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-08-06 15:22:58,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1204. [2021-08-06 15:22:58,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 3.344139650872818) internal successors, (4023), 1203 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 4023 transitions. [2021-08-06 15:22:58,234 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 4023 transitions. Word has length 26 [2021-08-06 15:22:58,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:58,234 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 4023 transitions. [2021-08-06 15:22:58,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-06 15:22:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 4023 transitions. [2021-08-06 15:22:58,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:22:58,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:58,236 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] [2021-08-06 15:22:58,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 15:22:58,448 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 [2021-08-06 15:22:58,449 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:58,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:58,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1510872304, now seen corresponding path program 6 times [2021-08-06 15:22:58,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:58,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410100715] [2021-08-06 15:22:58,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:58,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:22:58,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:58,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410100715] [2021-08-06 15:22:58,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410100715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:58,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053230332] [2021-08-06 15:22:58,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:22:58,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:58,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:58,828 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) [2021-08-06 15:22:58,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 15:22:59,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:22:59,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:59,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:22:59,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:00,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:23:00,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:23:00,267 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 104 treesize of output 78 [2021-08-06 15:23:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:00,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053230332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:00,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:00,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:23:00,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460709950] [2021-08-06 15:23:00,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:23:00,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:00,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:23:00,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:23:00,667 INFO L87 Difference]: Start difference. First operand 1204 states and 4023 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:03,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:03,015 INFO L93 Difference]: Finished difference Result 2155 states and 6754 transitions. [2021-08-06 15:23:03,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 15:23:03,015 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:23:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:03,018 INFO L225 Difference]: With dead ends: 2155 [2021-08-06 15:23:03,018 INFO L226 Difference]: Without dead ends: 2110 [2021-08-06 15:23:03,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 2100.0ms TimeCoverageRelationStatistics Valid=366, Invalid=2084, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 15:23:03,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-08-06 15:23:03,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1240. [2021-08-06 15:23:03,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 3.3422114608555287) internal successors, (4141), 1239 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:03,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 4141 transitions. [2021-08-06 15:23:03,039 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 4141 transitions. Word has length 26 [2021-08-06 15:23:03,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:03,039 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 4141 transitions. [2021-08-06 15:23:03,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 4141 transitions. [2021-08-06 15:23:03,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:23:03,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:03,041 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] [2021-08-06 15:23:03,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 15:23:03,259 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 [2021-08-06 15:23:03,259 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:03,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:03,260 INFO L82 PathProgramCache]: Analyzing trace with hash 39509260, now seen corresponding path program 37 times [2021-08-06 15:23:03,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:03,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670908983] [2021-08-06 15:23:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:03,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:03,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:03,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670908983] [2021-08-06 15:23:03,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670908983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:03,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107367628] [2021-08-06 15:23:03,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:23:03,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:03,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:03,830 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) [2021-08-06 15:23:03,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 15:23:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:04,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:23:04,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:05,858 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:23:05,858 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 116 treesize of output 82 [2021-08-06 15:23:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:05,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107367628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:05,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:05,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:23:05,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881163337] [2021-08-06 15:23:05,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:23:05,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:05,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:23:05,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:23:05,975 INFO L87 Difference]: Start difference. First operand 1240 states and 4141 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-06 15:23:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:08,787 INFO L93 Difference]: Finished difference Result 1953 states and 6229 transitions. [2021-08-06 15:23:08,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 15:23:08,787 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:23:08,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:08,791 INFO L225 Difference]: With dead ends: 1953 [2021-08-06 15:23:08,791 INFO L226 Difference]: Without dead ends: 1938 [2021-08-06 15:23:08,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 2685.1ms TimeCoverageRelationStatistics Valid=500, Invalid=2362, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 15:23:08,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-08-06 15:23:08,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1248. [2021-08-06 15:23:08,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 3.347233360064154) internal successors, (4174), 1247 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:08,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 4174 transitions. [2021-08-06 15:23:08,809 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 4174 transitions. Word has length 26 [2021-08-06 15:23:08,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:08,809 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 4174 transitions. [2021-08-06 15:23:08,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-06 15:23:08,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 4174 transitions. [2021-08-06 15:23:08,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:23:08,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:08,811 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] [2021-08-06 15:23:08,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-06 15:23:09,029 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 [2021-08-06 15:23:09,029 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:09,029 INFO L82 PathProgramCache]: Analyzing trace with hash -936809584, now seen corresponding path program 38 times [2021-08-06 15:23:09,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:09,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031225648] [2021-08-06 15:23:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:09,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:09,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:09,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031225648] [2021-08-06 15:23:09,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031225648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:09,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478955963] [2021-08-06 15:23:09,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:23:09,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:09,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:09,489 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) [2021-08-06 15:23:09,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 15:23:10,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:23:10,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:10,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:23:10,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:11,532 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-08-06 15:23:11,532 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 112 treesize of output 110 [2021-08-06 15:23:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:14,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478955963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:14,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:14,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 15:23:14,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606360458] [2021-08-06 15:23:14,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:23:14,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:14,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:23:14,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:23:14,681 INFO L87 Difference]: Start difference. First operand 1248 states and 4174 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) 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) [2021-08-06 15:23:18,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:18,761 INFO L93 Difference]: Finished difference Result 2565 states and 7893 transitions. [2021-08-06 15:23:18,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 15:23:18,761 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) 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 26 [2021-08-06 15:23:18,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:18,765 INFO L225 Difference]: With dead ends: 2565 [2021-08-06 15:23:18,765 INFO L226 Difference]: Without dead ends: 2520 [2021-08-06 15:23:18,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 3873.6ms TimeCoverageRelationStatistics Valid=695, Invalid=3727, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 15:23:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2021-08-06 15:23:18,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 1427. [2021-08-06 15:23:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 3.3162692847124826) internal successors, (4729), 1426 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:18,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 4729 transitions. [2021-08-06 15:23:18,787 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 4729 transitions. Word has length 26 [2021-08-06 15:23:18,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:18,787 INFO L470 AbstractCegarLoop]: Abstraction has 1427 states and 4729 transitions. [2021-08-06 15:23:18,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) 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) [2021-08-06 15:23:18,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 4729 transitions. [2021-08-06 15:23:18,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:23:18,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:18,789 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] [2021-08-06 15:23:18,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 15:23:19,008 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 [2021-08-06 15:23:19,008 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:19,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:19,009 INFO L82 PathProgramCache]: Analyzing trace with hash -755307532, now seen corresponding path program 7 times [2021-08-06 15:23:19,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:19,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706421621] [2021-08-06 15:23:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:19,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:19,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:19,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706421621] [2021-08-06 15:23:19,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706421621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:19,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873975580] [2021-08-06 15:23:19,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:23:19,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:19,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:19,571 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) [2021-08-06 15:23:19,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 15:23:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:20,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:23:20,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:21,517 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:23:21,517 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 110 treesize of output 79 [2021-08-06 15:23:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:21,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873975580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:21,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:21,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:23:21,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362216824] [2021-08-06 15:23:21,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:23:21,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:21,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:23:21,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:23:21,718 INFO L87 Difference]: Start difference. First operand 1427 states and 4729 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:23:22,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:22,644 INFO L93 Difference]: Finished difference Result 1799 states and 5860 transitions. [2021-08-06 15:23:22,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:23:22,644 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:23:22,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:22,647 INFO L225 Difference]: With dead ends: 1799 [2021-08-06 15:23:22,647 INFO L226 Difference]: Without dead ends: 1784 [2021-08-06 15:23:22,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1033.1ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:23:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-08-06 15:23:22,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1419. [2021-08-06 15:23:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.3201692524682653) internal successors, (4708), 1418 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:22,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4708 transitions. [2021-08-06 15:23:22,666 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4708 transitions. Word has length 26 [2021-08-06 15:23:22,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:22,666 INFO L470 AbstractCegarLoop]: Abstraction has 1419 states and 4708 transitions. [2021-08-06 15:23:22,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:23:22,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4708 transitions. [2021-08-06 15:23:22,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:23:22,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:22,668 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] [2021-08-06 15:23:22,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 15:23:22,883 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 [2021-08-06 15:23:22,883 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:22,883 INFO L82 PathProgramCache]: Analyzing trace with hash 625931212, now seen corresponding path program 8 times [2021-08-06 15:23:22,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:22,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214679061] [2021-08-06 15:23:22,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:22,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:23,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:23,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214679061] [2021-08-06 15:23:23,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214679061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:23,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39615932] [2021-08-06 15:23:23,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:23:23,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:23,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:23,178 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) [2021-08-06 15:23:23,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 15:23:24,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:23:24,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:24,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:23:24,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:25,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:23:25,253 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 114 treesize of output 96 [2021-08-06 15:23:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:26,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39615932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:26,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:26,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-06 15:23:26,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612053889] [2021-08-06 15:23:26,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:23:26,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:26,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:23:26,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:23:26,053 INFO L87 Difference]: Start difference. First operand 1419 states and 4708 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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) [2021-08-06 15:23:28,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:28,298 INFO L93 Difference]: Finished difference Result 2263 states and 7217 transitions. [2021-08-06 15:23:28,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:23:28,299 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 26 [2021-08-06 15:23:28,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:28,303 INFO L225 Difference]: With dead ends: 2263 [2021-08-06 15:23:28,303 INFO L226 Difference]: Without dead ends: 2218 [2021-08-06 15:23:28,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 2098.1ms TimeCoverageRelationStatistics Valid=289, Invalid=1517, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:23:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-08-06 15:23:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1451. [2021-08-06 15:23:28,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1450 states have (on average 3.3275862068965516) internal successors, (4825), 1450 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 4825 transitions. [2021-08-06 15:23:28,325 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 4825 transitions. Word has length 26 [2021-08-06 15:23:28,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:28,325 INFO L470 AbstractCegarLoop]: Abstraction has 1451 states and 4825 transitions. [2021-08-06 15:23:28,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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) [2021-08-06 15:23:28,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 4825 transitions. [2021-08-06 15:23:28,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:23:28,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:28,327 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] [2021-08-06 15:23:28,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 15:23:28,546 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 [2021-08-06 15:23:28,546 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:28,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:28,546 INFO L82 PathProgramCache]: Analyzing trace with hash -633075064, now seen corresponding path program 9 times [2021-08-06 15:23:28,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:28,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038949205] [2021-08-06 15:23:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:28,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:28,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:28,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038949205] [2021-08-06 15:23:28,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038949205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:28,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968864236] [2021-08-06 15:23:28,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:23:28,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:28,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:28,889 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) [2021-08-06 15:23:28,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 15:23:30,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:23:30,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:30,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:23:30,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:31,075 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:23:31,075 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 120 treesize of output 102 [2021-08-06 15:23:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:31,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968864236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:31,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:31,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:23:31,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800214184] [2021-08-06 15:23:31,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:23:31,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:31,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:23:31,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:23:31,818 INFO L87 Difference]: Start difference. First operand 1451 states and 4825 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:23:33,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:33,340 INFO L93 Difference]: Finished difference Result 2526 states and 8151 transitions. [2021-08-06 15:23:33,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:23:33,341 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:23:33,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:33,345 INFO L225 Difference]: With dead ends: 2526 [2021-08-06 15:23:33,345 INFO L226 Difference]: Without dead ends: 2511 [2021-08-06 15:23:33,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1470.9ms TimeCoverageRelationStatistics Valid=369, Invalid=1271, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:23:33,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-08-06 15:23:33,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 1463. [2021-08-06 15:23:33,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 3.3310533515731873) internal successors, (4870), 1462 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:33,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4870 transitions. [2021-08-06 15:23:33,369 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4870 transitions. Word has length 26 [2021-08-06 15:23:33,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:33,369 INFO L470 AbstractCegarLoop]: Abstraction has 1463 states and 4870 transitions. [2021-08-06 15:23:33,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:23:33,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4870 transitions. [2021-08-06 15:23:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:23:33,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:33,371 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] [2021-08-06 15:23:33,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 15:23:33,585 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 [2021-08-06 15:23:33,585 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:33,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:33,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1129796424, now seen corresponding path program 10 times [2021-08-06 15:23:33,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:33,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206354143] [2021-08-06 15:23:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:33,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:33,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:33,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206354143] [2021-08-06 15:23:33,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206354143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:33,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426525918] [2021-08-06 15:23:33,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:23:33,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:33,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:33,911 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) [2021-08-06 15:23:33,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 15:23:35,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:23:35,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:35,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:23:35,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:36,308 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:23:36,309 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 110 treesize of output 79 [2021-08-06 15:23:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:36,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426525918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:36,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:36,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:23:36,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620506609] [2021-08-06 15:23:36,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:23:36,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:36,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:23:36,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:23:36,527 INFO L87 Difference]: Start difference. First operand 1463 states and 4870 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:23:38,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:38,100 INFO L93 Difference]: Finished difference Result 2317 states and 7388 transitions. [2021-08-06 15:23:38,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:23:38,101 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:23:38,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:38,104 INFO L225 Difference]: With dead ends: 2317 [2021-08-06 15:23:38,104 INFO L226 Difference]: Without dead ends: 2272 [2021-08-06 15:23:38,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1340.4ms TimeCoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:23:38,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-08-06 15:23:38,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1481. [2021-08-06 15:23:38,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 3.3391891891891894) internal successors, (4942), 1480 states have internal predecessors, (4942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 4942 transitions. [2021-08-06 15:23:38,128 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 4942 transitions. Word has length 26 [2021-08-06 15:23:38,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:38,128 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 4942 transitions. [2021-08-06 15:23:38,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:23:38,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 4942 transitions. [2021-08-06 15:23:38,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:23:38,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:38,130 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] [2021-08-06 15:23:38,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-06 15:23:38,344 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 [2021-08-06 15:23:38,345 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:38,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:38,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1547638092, now seen corresponding path program 11 times [2021-08-06 15:23:38,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:38,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540199438] [2021-08-06 15:23:38,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:38,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:38,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:38,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540199438] [2021-08-06 15:23:38,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540199438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:38,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230741133] [2021-08-06 15:23:38,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:23:38,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:38,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:38,661 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) [2021-08-06 15:23:38,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 15:23:40,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:23:40,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:40,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:23:40,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:40,727 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:23:40,727 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 110 treesize of output 84 [2021-08-06 15:23:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:41,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230741133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:41,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:41,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:23:41,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628233251] [2021-08-06 15:23:41,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:23:41,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:41,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:23:41,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:23:41,276 INFO L87 Difference]: Start difference. First operand 1481 states and 4942 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:43,077 INFO L93 Difference]: Finished difference Result 2571 states and 8202 transitions. [2021-08-06 15:23:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 15:23:43,077 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:23:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:43,081 INFO L225 Difference]: With dead ends: 2571 [2021-08-06 15:23:43,081 INFO L226 Difference]: Without dead ends: 2541 [2021-08-06 15:23:43,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1609.0ms TimeCoverageRelationStatistics Valid=391, Invalid=1679, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:23:43,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-08-06 15:23:43,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 1483. [2021-08-06 15:23:43,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 3.3454790823211877) internal successors, (4958), 1482 states have internal predecessors, (4958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:43,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 4958 transitions. [2021-08-06 15:23:43,105 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 4958 transitions. Word has length 26 [2021-08-06 15:23:43,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:43,105 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 4958 transitions. [2021-08-06 15:23:43,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:43,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 4958 transitions. [2021-08-06 15:23:43,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:23:43,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:43,108 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] [2021-08-06 15:23:43,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 15:23:43,328 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 [2021-08-06 15:23:43,328 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:43,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:43,329 INFO L82 PathProgramCache]: Analyzing trace with hash 338936652, now seen corresponding path program 39 times [2021-08-06 15:23:43,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:43,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100949443] [2021-08-06 15:23:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:43,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:43,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:43,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100949443] [2021-08-06 15:23:43,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100949443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:43,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470702947] [2021-08-06 15:23:43,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:23:43,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:43,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:43,739 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) [2021-08-06 15:23:43,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 15:23:45,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:23:45,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:45,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:23:45,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:46,082 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:23:46,083 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 116 treesize of output 82 [2021-08-06 15:23:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:46,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470702947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:46,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:46,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 15:23:46,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198900838] [2021-08-06 15:23:46,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:23:46,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:46,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:23:46,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:23:46,234 INFO L87 Difference]: Start difference. First operand 1483 states and 4958 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-06 15:23:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:49,912 INFO L93 Difference]: Finished difference Result 3300 states and 10311 transitions. [2021-08-06 15:23:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 15:23:49,912 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-08-06 15:23:49,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:49,918 INFO L225 Difference]: With dead ends: 3300 [2021-08-06 15:23:49,918 INFO L226 Difference]: Without dead ends: 3255 [2021-08-06 15:23:49,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 3296.7ms TimeCoverageRelationStatistics Valid=732, Invalid=3824, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 15:23:49,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-08-06 15:23:49,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 1502. [2021-08-06 15:23:49,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 3.36309127248501) internal successors, (5048), 1501 states have internal predecessors, (5048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:49,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 5048 transitions. [2021-08-06 15:23:49,949 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 5048 transitions. Word has length 26 [2021-08-06 15:23:49,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:49,949 INFO L470 AbstractCegarLoop]: Abstraction has 1502 states and 5048 transitions. [2021-08-06 15:23:49,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-06 15:23:49,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 5048 transitions. [2021-08-06 15:23:49,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:23:49,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:49,952 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] [2021-08-06 15:23:49,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 15:23:50,171 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 [2021-08-06 15:23:50,171 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:50,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1541249020, now seen corresponding path program 40 times [2021-08-06 15:23:50,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:50,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753685418] [2021-08-06 15:23:50,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:50,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:50,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:50,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753685418] [2021-08-06 15:23:50,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753685418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:50,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883363290] [2021-08-06 15:23:50,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:23:50,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:50,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:50,573 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) [2021-08-06 15:23:50,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 15:23:52,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:23:52,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:52,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:23:52,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:53,035 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:23:53,035 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 116 treesize of output 82 [2021-08-06 15:23:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:53,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883363290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:53,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:53,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 15:23:53,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128035359] [2021-08-06 15:23:53,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:23:53,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:53,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:23:53,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:23:53,185 INFO L87 Difference]: Start difference. First operand 1502 states and 5048 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-06 15:23:56,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:56,047 INFO L93 Difference]: Finished difference Result 3111 states and 9846 transitions. [2021-08-06 15:23:56,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:23:56,047 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-08-06 15:23:56,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:56,052 INFO L225 Difference]: With dead ends: 3111 [2021-08-06 15:23:56,052 INFO L226 Difference]: Without dead ends: 3066 [2021-08-06 15:23:56,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 2571.4ms TimeCoverageRelationStatistics Valid=602, Invalid=2704, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 15:23:56,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2021-08-06 15:23:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 1502. [2021-08-06 15:23:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 3.3637574950033313) internal successors, (5049), 1501 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:56,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 5049 transitions. [2021-08-06 15:23:56,079 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 5049 transitions. Word has length 26 [2021-08-06 15:23:56,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:56,079 INFO L470 AbstractCegarLoop]: Abstraction has 1502 states and 5049 transitions. [2021-08-06 15:23:56,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-06 15:23:56,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 5049 transitions. [2021-08-06 15:23:56,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:23:56,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:56,082 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] [2021-08-06 15:23:56,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-06 15:23:56,301 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 [2021-08-06 15:23:56,301 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:56,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:56,302 INFO L82 PathProgramCache]: Analyzing trace with hash -920069624, now seen corresponding path program 41 times [2021-08-06 15:23:56,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:56,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195058965] [2021-08-06 15:23:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:56,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:23:56,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:56,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195058965] [2021-08-06 15:23:56,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195058965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:56,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939322985] [2021-08-06 15:23:56,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:23:56,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:56,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:56,697 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) [2021-08-06 15:23:56,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 15:23:58,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:23:58,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:58,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:23:58,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:59,288 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-06 15:23:59,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 129 [2021-08-06 15:24:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:01,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939322985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:01,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:01,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 15:24:01,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31259012] [2021-08-06 15:24:01,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:24:01,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:01,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:24:01,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:24:01,466 INFO L87 Difference]: Start difference. First operand 1502 states and 5049 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-08-06 15:24:05,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:05,850 INFO L93 Difference]: Finished difference Result 3851 states and 12062 transitions. [2021-08-06 15:24:05,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 15:24:05,850 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 26 [2021-08-06 15:24:05,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:05,859 INFO L225 Difference]: With dead ends: 3851 [2021-08-06 15:24:05,859 INFO L226 Difference]: Without dead ends: 3799 [2021-08-06 15:24:05,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1821 ImplicationChecksByTransitivity, 3803.8ms TimeCoverageRelationStatistics Valid=1069, Invalid=4333, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 15:24:05,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3799 states. [2021-08-06 15:24:05,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3799 to 1621. [2021-08-06 15:24:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.3833333333333333) internal successors, (5481), 1620 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:05,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5481 transitions. [2021-08-06 15:24:05,894 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5481 transitions. Word has length 26 [2021-08-06 15:24:05,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:05,894 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 5481 transitions. [2021-08-06 15:24:05,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-08-06 15:24:05,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5481 transitions. [2021-08-06 15:24:05,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:05,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:05,897 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] [2021-08-06 15:24:05,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 15:24:06,118 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 [2021-08-06 15:24:06,118 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:06,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:06,118 INFO L82 PathProgramCache]: Analyzing trace with hash -496512208, now seen corresponding path program 12 times [2021-08-06 15:24:06,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:06,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537874237] [2021-08-06 15:24:06,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:06,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:06,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:06,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537874237] [2021-08-06 15:24:06,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537874237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:06,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681581175] [2021-08-06 15:24:06,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:24:06,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:06,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:06,509 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) [2021-08-06 15:24:06,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 15:24:08,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:24:08,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:24:08,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:24:08,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:09,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:24:09,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:24:09,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:24:09,006 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 136 treesize of output 94 [2021-08-06 15:24:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:09,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681581175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:09,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:09,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:24:09,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966831035] [2021-08-06 15:24:09,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:24:09,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:09,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:24:09,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:24:09,421 INFO L87 Difference]: Start difference. First operand 1621 states and 5481 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:11,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:11,072 INFO L93 Difference]: Finished difference Result 2357 states and 7671 transitions. [2021-08-06 15:24:11,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:24:11,072 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:24:11,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:11,076 INFO L225 Difference]: With dead ends: 2357 [2021-08-06 15:24:11,076 INFO L226 Difference]: Without dead ends: 2312 [2021-08-06 15:24:11,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1479.0ms TimeCoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:24:11,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-08-06 15:24:11,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1629. [2021-08-06 15:24:11,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.3796068796068797) internal successors, (5502), 1628 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5502 transitions. [2021-08-06 15:24:11,102 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5502 transitions. Word has length 26 [2021-08-06 15:24:11,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:11,103 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 5502 transitions. [2021-08-06 15:24:11,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:11,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5502 transitions. [2021-08-06 15:24:11,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:11,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:11,105 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] [2021-08-06 15:24:11,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 15:24:11,320 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 [2021-08-06 15:24:11,321 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:11,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:11,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1323552524, now seen corresponding path program 13 times [2021-08-06 15:24:11,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:11,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867023044] [2021-08-06 15:24:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:11,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:11,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:11,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867023044] [2021-08-06 15:24:11,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867023044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:11,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331811210] [2021-08-06 15:24:11,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:24:11,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:11,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:11,617 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) [2021-08-06 15:24:11,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 15:24:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:13,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:24:13,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:14,372 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:24:14,372 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 110 treesize of output 79 [2021-08-06 15:24:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:14,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331811210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:14,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:14,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:24:14,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794465580] [2021-08-06 15:24:14,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:24:14,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:14,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:24:14,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:24:14,486 INFO L87 Difference]: Start difference. First operand 1629 states and 5502 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:15,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:15,614 INFO L93 Difference]: Finished difference Result 2315 states and 7493 transitions. [2021-08-06 15:24:15,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:24:15,614 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:24:15,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:15,618 INFO L225 Difference]: With dead ends: 2315 [2021-08-06 15:24:15,618 INFO L226 Difference]: Without dead ends: 2269 [2021-08-06 15:24:15,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 993.7ms TimeCoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 15:24:15,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-08-06 15:24:15,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1705. [2021-08-06 15:24:15,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.3732394366197185) internal successors, (5748), 1704 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:15,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5748 transitions. [2021-08-06 15:24:15,645 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5748 transitions. Word has length 26 [2021-08-06 15:24:15,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:15,645 INFO L470 AbstractCegarLoop]: Abstraction has 1705 states and 5748 transitions. [2021-08-06 15:24:15,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:15,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5748 transitions. [2021-08-06 15:24:15,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:15,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:15,648 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] [2021-08-06 15:24:15,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 15:24:15,864 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 [2021-08-06 15:24:15,865 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:15,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:15,865 INFO L82 PathProgramCache]: Analyzing trace with hash -911772596, now seen corresponding path program 14 times [2021-08-06 15:24:15,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:15,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660415879] [2021-08-06 15:24:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:15,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:16,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:16,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660415879] [2021-08-06 15:24:16,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660415879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:16,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685269661] [2021-08-06 15:24:16,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:24:16,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:16,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:16,145 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) [2021-08-06 15:24:16,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 15:24:18,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:24:18,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:24:18,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:24:18,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:18,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:24:18,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:24:18,609 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 104 treesize of output 78 [2021-08-06 15:24:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:19,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685269661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:19,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:19,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:24:19,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062669236] [2021-08-06 15:24:19,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:24:19,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:19,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:24:19,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:24:19,165 INFO L87 Difference]: Start difference. First operand 1705 states and 5748 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:20,359 INFO L93 Difference]: Finished difference Result 2500 states and 8111 transitions. [2021-08-06 15:24:20,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:24:20,360 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:24:20,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:20,364 INFO L225 Difference]: With dead ends: 2500 [2021-08-06 15:24:20,364 INFO L226 Difference]: Without dead ends: 2465 [2021-08-06 15:24:20,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1121.8ms TimeCoverageRelationStatistics Valid=256, Invalid=1076, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 15:24:20,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-08-06 15:24:20,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1731. [2021-08-06 15:24:20,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 3.373988439306358) internal successors, (5837), 1730 states have internal predecessors, (5837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:20,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 5837 transitions. [2021-08-06 15:24:20,395 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 5837 transitions. Word has length 26 [2021-08-06 15:24:20,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:20,395 INFO L470 AbstractCegarLoop]: Abstraction has 1731 states and 5837 transitions. [2021-08-06 15:24:20,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:20,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 5837 transitions. [2021-08-06 15:24:20,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:20,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:20,398 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] [2021-08-06 15:24:20,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-06 15:24:20,612 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 [2021-08-06 15:24:20,613 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:20,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:20,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1454516880, now seen corresponding path program 15 times [2021-08-06 15:24:20,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:20,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490619369] [2021-08-06 15:24:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:20,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:21,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:21,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490619369] [2021-08-06 15:24:21,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490619369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:21,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722456214] [2021-08-06 15:24:21,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:24:21,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:21,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:21,037 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) [2021-08-06 15:24:21,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 15:24:22,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:24:22,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:24:22,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:24:22,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:23,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:24:23,677 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 120 treesize of output 110 [2021-08-06 15:24:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:25,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722456214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:25,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:25,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 15:24:25,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447877108] [2021-08-06 15:24:25,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:24:25,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:25,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:24:25,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:24:25,200 INFO L87 Difference]: Start difference. First operand 1731 states and 5837 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:26,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:26,338 INFO L93 Difference]: Finished difference Result 2106 states and 6880 transitions. [2021-08-06 15:24:26,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:24:26,339 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:24:26,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:26,343 INFO L225 Difference]: With dead ends: 2106 [2021-08-06 15:24:26,343 INFO L226 Difference]: Without dead ends: 2085 [2021-08-06 15:24:26,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1175.7ms TimeCoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:24:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-08-06 15:24:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1757. [2021-08-06 15:24:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1756 states have (on average 3.379840546697039) internal successors, (5935), 1756 states have internal predecessors, (5935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 5935 transitions. [2021-08-06 15:24:26,368 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 5935 transitions. Word has length 26 [2021-08-06 15:24:26,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:26,368 INFO L470 AbstractCegarLoop]: Abstraction has 1757 states and 5935 transitions. [2021-08-06 15:24:26,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:26,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 5935 transitions. [2021-08-06 15:24:26,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:26,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:26,371 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] [2021-08-06 15:24:26,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 15:24:26,576 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 [2021-08-06 15:24:26,576 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:26,576 INFO L82 PathProgramCache]: Analyzing trace with hash 777923186, now seen corresponding path program 16 times [2021-08-06 15:24:26,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:26,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862026172] [2021-08-06 15:24:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:26,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:26,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:26,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862026172] [2021-08-06 15:24:26,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862026172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:26,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978367728] [2021-08-06 15:24:26,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:24:26,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:26,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:26,952 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) [2021-08-06 15:24:26,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 15:24:29,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:24:29,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:24:29,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:24:29,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:29,659 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:24:29,659 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 110 treesize of output 84 [2021-08-06 15:24:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:30,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978367728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:30,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:30,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 15:24:30,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754295751] [2021-08-06 15:24:30,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:24:30,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:30,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:24:30,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:24:30,068 INFO L87 Difference]: Start difference. First operand 1757 states and 5935 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-08-06 15:24:30,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:30,660 INFO L93 Difference]: Finished difference Result 2304 states and 7592 transitions. [2021-08-06 15:24:30,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:24:30,661 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 [2021-08-06 15:24:30,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:30,665 INFO L225 Difference]: With dead ends: 2304 [2021-08-06 15:24:30,665 INFO L226 Difference]: Without dead ends: 2279 [2021-08-06 15:24:30,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 583.4ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:24:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2021-08-06 15:24:30,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 1761. [2021-08-06 15:24:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1760 states have (on average 3.3806818181818183) internal successors, (5950), 1760 states have internal predecessors, (5950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 5950 transitions. [2021-08-06 15:24:30,691 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 5950 transitions. Word has length 26 [2021-08-06 15:24:30,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:30,691 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 5950 transitions. [2021-08-06 15:24:30,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-08-06 15:24:30,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 5950 transitions. [2021-08-06 15:24:30,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:30,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:30,694 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] [2021-08-06 15:24:30,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 15:24:30,908 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 [2021-08-06 15:24:30,909 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:30,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:30,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2033909172, now seen corresponding path program 17 times [2021-08-06 15:24:30,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:30,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913345320] [2021-08-06 15:24:30,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:30,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:31,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:31,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913345320] [2021-08-06 15:24:31,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913345320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:31,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094088514] [2021-08-06 15:24:31,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:24:31,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:31,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:31,234 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) [2021-08-06 15:24:31,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 15:24:33,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:24:33,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:24:33,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:24:33,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:34,124 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:24:34,124 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 110 treesize of output 79 [2021-08-06 15:24:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:34,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094088514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:34,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:34,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 15:24:34,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21005321] [2021-08-06 15:24:34,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:24:34,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:34,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:24:34,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:24:34,300 INFO L87 Difference]: Start difference. First operand 1761 states and 5950 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-08-06 15:24:34,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:34,837 INFO L93 Difference]: Finished difference Result 2171 states and 7180 transitions. [2021-08-06 15:24:34,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:24:34,837 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 [2021-08-06 15:24:34,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:34,841 INFO L225 Difference]: With dead ends: 2171 [2021-08-06 15:24:34,841 INFO L226 Difference]: Without dead ends: 2156 [2021-08-06 15:24:34,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 468.7ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:24:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-08-06 15:24:34,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1764. [2021-08-06 15:24:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.3817356778218945) internal successors, (5962), 1763 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:34,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5962 transitions. [2021-08-06 15:24:34,862 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5962 transitions. Word has length 26 [2021-08-06 15:24:34,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:34,863 INFO L470 AbstractCegarLoop]: Abstraction has 1764 states and 5962 transitions. [2021-08-06 15:24:34,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-08-06 15:24:34,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5962 transitions. [2021-08-06 15:24:34,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:34,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:34,865 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] [2021-08-06 15:24:34,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 15:24:35,080 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 [2021-08-06 15:24:35,081 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:35,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:35,081 INFO L82 PathProgramCache]: Analyzing trace with hash 920481968, now seen corresponding path program 18 times [2021-08-06 15:24:35,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:35,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892122026] [2021-08-06 15:24:35,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:35,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:35,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:35,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892122026] [2021-08-06 15:24:35,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892122026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:35,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183990544] [2021-08-06 15:24:35,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:24:35,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:35,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:35,508 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) [2021-08-06 15:24:35,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 15:24:37,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:24:37,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:24:37,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:24:37,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:38,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:24:38,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:24:38,022 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 104 treesize of output 78 [2021-08-06 15:24:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:38,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183990544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:38,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:38,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:24:38,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085498120] [2021-08-06 15:24:38,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:24:38,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:38,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:24:38,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:24:38,470 INFO L87 Difference]: Start difference. First operand 1764 states and 5962 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:39,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:39,610 INFO L93 Difference]: Finished difference Result 2364 states and 7797 transitions. [2021-08-06 15:24:39,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:24:39,610 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:24:39,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:39,614 INFO L225 Difference]: With dead ends: 2364 [2021-08-06 15:24:39,614 INFO L226 Difference]: Without dead ends: 2330 [2021-08-06 15:24:39,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1043.1ms TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:24:39,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-08-06 15:24:39,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1781. [2021-08-06 15:24:39,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1780 states have (on average 3.385393258426966) internal successors, (6026), 1780 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 6026 transitions. [2021-08-06 15:24:39,639 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 6026 transitions. Word has length 26 [2021-08-06 15:24:39,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:39,639 INFO L470 AbstractCegarLoop]: Abstraction has 1781 states and 6026 transitions. [2021-08-06 15:24:39,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:39,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 6026 transitions. [2021-08-06 15:24:39,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:39,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:39,645 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] [2021-08-06 15:24:39,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 15:24:39,860 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 [2021-08-06 15:24:39,861 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:39,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:39,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1907973580, now seen corresponding path program 19 times [2021-08-06 15:24:39,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:39,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907956333] [2021-08-06 15:24:39,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:39,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:40,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:40,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907956333] [2021-08-06 15:24:40,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907956333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:40,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426063373] [2021-08-06 15:24:40,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:24:40,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:40,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:40,331 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) [2021-08-06 15:24:40,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 15:24:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:42,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:24:42,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:43,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:24:43,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:24:43,147 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 104 treesize of output 78 [2021-08-06 15:24:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:43,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426063373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:43,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:43,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:24:43,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643866141] [2021-08-06 15:24:43,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:24:43,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:43,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:24:43,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:24:43,698 INFO L87 Difference]: Start difference. First operand 1781 states and 6026 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:44,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:44,732 INFO L93 Difference]: Finished difference Result 2422 states and 7969 transitions. [2021-08-06 15:24:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:24:44,732 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:24:44,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:44,736 INFO L225 Difference]: With dead ends: 2422 [2021-08-06 15:24:44,736 INFO L226 Difference]: Without dead ends: 2376 [2021-08-06 15:24:44,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1071.8ms TimeCoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:24:44,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-08-06 15:24:44,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1802. [2021-08-06 15:24:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1801 states have (on average 3.38811771238201) internal successors, (6102), 1801 states have internal predecessors, (6102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 6102 transitions. [2021-08-06 15:24:44,762 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 6102 transitions. Word has length 26 [2021-08-06 15:24:44,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:44,762 INFO L470 AbstractCegarLoop]: Abstraction has 1802 states and 6102 transitions. [2021-08-06 15:24:44,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:44,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 6102 transitions. [2021-08-06 15:24:44,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:44,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:44,765 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] [2021-08-06 15:24:44,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 15:24:44,987 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 [2021-08-06 15:24:44,987 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:44,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:44,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1013224948, now seen corresponding path program 42 times [2021-08-06 15:24:44,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:44,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539313873] [2021-08-06 15:24:44,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:44,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:45,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:45,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539313873] [2021-08-06 15:24:45,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539313873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:45,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531745113] [2021-08-06 15:24:45,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:24:45,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:45,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:45,249 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) [2021-08-06 15:24:45,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 15:24:47,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:24:47,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:24:47,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:24:47,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:48,512 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:24:48,512 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 116 treesize of output 82 [2021-08-06 15:24:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:48,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531745113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:48,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:48,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 15:24:48,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163515342] [2021-08-06 15:24:48,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:24:48,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:48,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:24:48,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:24:48,614 INFO L87 Difference]: Start difference. First operand 1802 states and 6102 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:24:49,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:49,283 INFO L93 Difference]: Finished difference Result 2272 states and 7520 transitions. [2021-08-06 15:24:49,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:24:49,283 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-08-06 15:24:49,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:49,287 INFO L225 Difference]: With dead ends: 2272 [2021-08-06 15:24:49,287 INFO L226 Difference]: Without dead ends: 2246 [2021-08-06 15:24:49,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 658.4ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:24:49,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-08-06 15:24:49,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1794. [2021-08-06 15:24:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 3.385387618516453) internal successors, (6070), 1793 states have internal predecessors, (6070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:49,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 6070 transitions. [2021-08-06 15:24:49,311 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 6070 transitions. Word has length 26 [2021-08-06 15:24:49,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:49,311 INFO L470 AbstractCegarLoop]: Abstraction has 1794 states and 6070 transitions. [2021-08-06 15:24:49,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:24:49,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 6070 transitions. [2021-08-06 15:24:49,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:49,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:49,313 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] [2021-08-06 15:24:49,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 15:24:49,528 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 [2021-08-06 15:24:49,529 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:49,529 INFO L82 PathProgramCache]: Analyzing trace with hash 54649616, now seen corresponding path program 43 times [2021-08-06 15:24:49,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:49,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565937225] [2021-08-06 15:24:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:49,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:49,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:49,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565937225] [2021-08-06 15:24:49,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565937225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:49,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396768441] [2021-08-06 15:24:49,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:24:49,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:49,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:49,797 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) [2021-08-06 15:24:49,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 15:24:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:52,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:24:52,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:52,897 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:24:52,897 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 120 treesize of output 82 [2021-08-06 15:24:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:53,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396768441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:53,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:53,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 15:24:53,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905403176] [2021-08-06 15:24:53,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:24:53,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:53,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:24:53,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:24:53,065 INFO L87 Difference]: Start difference. First operand 1794 states and 6070 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:24:54,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:54,154 INFO L93 Difference]: Finished difference Result 2513 states and 8292 transitions. [2021-08-06 15:24:54,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:24:54,155 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-08-06 15:24:54,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:54,160 INFO L225 Difference]: With dead ends: 2513 [2021-08-06 15:24:54,160 INFO L226 Difference]: Without dead ends: 2498 [2021-08-06 15:24:54,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 957.6ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:24:54,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-08-06 15:24:54,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 1800. [2021-08-06 15:24:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 3.386881600889383) internal successors, (6093), 1799 states have internal predecessors, (6093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 6093 transitions. [2021-08-06 15:24:54,188 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 6093 transitions. Word has length 26 [2021-08-06 15:24:54,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:54,188 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 6093 transitions. [2021-08-06 15:24:54,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:24:54,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 6093 transitions. [2021-08-06 15:24:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:54,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:54,191 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] [2021-08-06 15:24:54,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 15:24:54,405 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 [2021-08-06 15:24:54,405 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:54,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:54,405 INFO L82 PathProgramCache]: Analyzing trace with hash -533725808, now seen corresponding path program 20 times [2021-08-06 15:24:54,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:54,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684322515] [2021-08-06 15:24:54,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:54,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:54,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:54,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684322515] [2021-08-06 15:24:54,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684322515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:54,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051228753] [2021-08-06 15:24:54,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:24:54,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:54,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:54,794 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) [2021-08-06 15:24:54,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 15:24:57,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:24:57,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:24:57,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:24:57,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:57,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:24:57,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:24:57,910 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 104 treesize of output 78 [2021-08-06 15:24:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:24:58,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051228753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:58,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:58,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:24:58,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263722083] [2021-08-06 15:24:58,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:24:58,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:24:58,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:24:58,285 INFO L87 Difference]: Start difference. First operand 1800 states and 6093 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:00,195 INFO L93 Difference]: Finished difference Result 2537 states and 8275 transitions. [2021-08-06 15:25:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:25:00,196 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:25:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:00,200 INFO L225 Difference]: With dead ends: 2537 [2021-08-06 15:25:00,200 INFO L226 Difference]: Without dead ends: 2503 [2021-08-06 15:25:00,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1650.3ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:25:00,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2021-08-06 15:25:00,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1811. [2021-08-06 15:25:00,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.387292817679558) internal successors, (6131), 1810 states have internal predecessors, (6131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6131 transitions. [2021-08-06 15:25:00,227 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6131 transitions. Word has length 26 [2021-08-06 15:25:00,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:00,227 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 6131 transitions. [2021-08-06 15:25:00,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:00,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6131 transitions. [2021-08-06 15:25:00,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:00,230 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:00,230 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] [2021-08-06 15:25:00,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 15:25:00,453 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 [2021-08-06 15:25:00,454 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:00,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:00,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1016655756, now seen corresponding path program 44 times [2021-08-06 15:25:00,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:00,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835124642] [2021-08-06 15:25:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:00,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:01,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:01,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835124642] [2021-08-06 15:25:01,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835124642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:01,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692923633] [2021-08-06 15:25:01,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:25:01,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:01,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:01,012 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) [2021-08-06 15:25:01,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 15:25:03,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:25:03,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:03,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:25:03,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:04,752 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 15:25:04,753 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 118 treesize of output 102 [2021-08-06 15:25:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:05,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692923633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:05,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:05,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 15:25:05,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152771410] [2021-08-06 15:25:05,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:25:05,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:05,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:25:05,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:25:05,604 INFO L87 Difference]: Start difference. First operand 1811 states and 6131 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) [2021-08-06 15:25:08,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:08,443 INFO L93 Difference]: Finished difference Result 2762 states and 8870 transitions. [2021-08-06 15:25:08,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 15:25:08,443 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 26 [2021-08-06 15:25:08,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:08,448 INFO L225 Difference]: With dead ends: 2762 [2021-08-06 15:25:08,448 INFO L226 Difference]: Without dead ends: 2718 [2021-08-06 15:25:08,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 2430.5ms TimeCoverageRelationStatistics Valid=534, Invalid=2658, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 15:25:08,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2718 states. [2021-08-06 15:25:08,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2718 to 1814. [2021-08-06 15:25:08,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.3877551020408165) internal successors, (6142), 1813 states have internal predecessors, (6142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:08,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 6142 transitions. [2021-08-06 15:25:08,476 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 6142 transitions. Word has length 26 [2021-08-06 15:25:08,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:08,477 INFO L470 AbstractCegarLoop]: Abstraction has 1814 states and 6142 transitions. [2021-08-06 15:25:08,477 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) [2021-08-06 15:25:08,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 6142 transitions. [2021-08-06 15:25:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:08,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:08,479 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] [2021-08-06 15:25:08,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 15:25:08,692 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 [2021-08-06 15:25:08,693 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:08,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:08,693 INFO L82 PathProgramCache]: Analyzing trace with hash 40336912, now seen corresponding path program 45 times [2021-08-06 15:25:08,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:08,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226998089] [2021-08-06 15:25:08,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:08,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:08,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:08,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226998089] [2021-08-06 15:25:08,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226998089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:08,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248378130] [2021-08-06 15:25:08,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:25:08,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:08,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:08,968 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) [2021-08-06 15:25:08,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 15:25:11,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:25:11,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:11,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:25:11,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:12,774 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-08-06 15:25:12,774 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 112 treesize of output 110 [2021-08-06 15:25:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:15,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248378130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:15,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:15,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 15:25:15,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221896752] [2021-08-06 15:25:15,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:25:15,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:15,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:25:15,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:25:15,648 INFO L87 Difference]: Start difference. First operand 1814 states and 6142 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) 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) [2021-08-06 15:25:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:19,395 INFO L93 Difference]: Finished difference Result 3548 states and 11267 transitions. [2021-08-06 15:25:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 15:25:19,396 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) 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 26 [2021-08-06 15:25:19,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:19,402 INFO L225 Difference]: With dead ends: 3548 [2021-08-06 15:25:19,403 INFO L226 Difference]: Without dead ends: 3518 [2021-08-06 15:25:19,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 3203.0ms TimeCoverageRelationStatistics Valid=781, Invalid=4331, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 15:25:19,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3518 states. [2021-08-06 15:25:19,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3518 to 1898. [2021-08-06 15:25:19,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1897 states have (on average 3.390089615181866) internal successors, (6431), 1897 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:19,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 6431 transitions. [2021-08-06 15:25:19,467 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 6431 transitions. Word has length 26 [2021-08-06 15:25:19,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:19,467 INFO L470 AbstractCegarLoop]: Abstraction has 1898 states and 6431 transitions. [2021-08-06 15:25:19,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) 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) [2021-08-06 15:25:19,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 6431 transitions. [2021-08-06 15:25:19,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:19,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:19,470 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] [2021-08-06 15:25:19,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 15:25:19,696 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 [2021-08-06 15:25:19,697 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:19,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:19,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1242649280, now seen corresponding path program 46 times [2021-08-06 15:25:19,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:19,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845953127] [2021-08-06 15:25:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:19,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:19,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:19,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845953127] [2021-08-06 15:25:19,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845953127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:19,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445473477] [2021-08-06 15:25:19,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:25:19,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:19,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:19,998 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) [2021-08-06 15:25:19,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 15:25:22,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:25:22,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:22,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:25:22,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:23,665 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:25:23,666 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 116 treesize of output 82 [2021-08-06 15:25:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:23,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445473477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:23,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:23,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 15:25:23,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338129956] [2021-08-06 15:25:23,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:25:23,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:23,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:25:23,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:25:23,809 INFO L87 Difference]: Start difference. First operand 1898 states and 6431 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-06 15:25:25,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:25,943 INFO L93 Difference]: Finished difference Result 3657 states and 11787 transitions. [2021-08-06 15:25:25,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 15:25:25,943 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-08-06 15:25:25,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:25,949 INFO L225 Difference]: With dead ends: 3657 [2021-08-06 15:25:25,950 INFO L226 Difference]: Without dead ends: 3621 [2021-08-06 15:25:25,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1871.2ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 15:25:25,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3621 states. [2021-08-06 15:25:25,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3621 to 2024. [2021-08-06 15:25:25,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 3.4102817597627286) internal successors, (6899), 2023 states have internal predecessors, (6899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 6899 transitions. [2021-08-06 15:25:25,994 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 6899 transitions. Word has length 26 [2021-08-06 15:25:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:25,994 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 6899 transitions. [2021-08-06 15:25:25,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-06 15:25:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 6899 transitions. [2021-08-06 15:25:25,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:25,997 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:25,997 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] [2021-08-06 15:25:26,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 15:25:26,212 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 [2021-08-06 15:25:26,213 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:26,213 INFO L82 PathProgramCache]: Analyzing trace with hash 828878638, now seen corresponding path program 47 times [2021-08-06 15:25:26,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:26,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102029778] [2021-08-06 15:25:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:26,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:26,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:26,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102029778] [2021-08-06 15:25:26,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102029778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:26,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216130405] [2021-08-06 15:25:26,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:25:26,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:26,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:26,625 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) [2021-08-06 15:25:26,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 15:25:29,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:25:29,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:29,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:25:29,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:30,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:25:30,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:25:30,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:25:30,090 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 110 treesize of output 96 [2021-08-06 15:25:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:30,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216130405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:30,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:30,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:25:30,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987327648] [2021-08-06 15:25:30,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:25:30,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:30,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:25:30,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:25:30,748 INFO L87 Difference]: Start difference. First operand 2024 states and 6899 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-06 15:25:34,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:34,212 INFO L93 Difference]: Finished difference Result 3067 states and 9929 transitions. [2021-08-06 15:25:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 15:25:34,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:25:34,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:34,217 INFO L225 Difference]: With dead ends: 3067 [2021-08-06 15:25:34,217 INFO L226 Difference]: Without dead ends: 3041 [2021-08-06 15:25:34,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 3147.3ms TimeCoverageRelationStatistics Valid=723, Invalid=2817, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:25:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-08-06 15:25:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2014. [2021-08-06 15:25:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2014 states, 2013 states have (on average 3.402881271733731) internal successors, (6850), 2013 states have internal predecessors, (6850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:34,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2014 states to 2014 states and 6850 transitions. [2021-08-06 15:25:34,253 INFO L78 Accepts]: Start accepts. Automaton has 2014 states and 6850 transitions. Word has length 26 [2021-08-06 15:25:34,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:34,253 INFO L470 AbstractCegarLoop]: Abstraction has 2014 states and 6850 transitions. [2021-08-06 15:25:34,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-06 15:25:34,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2014 states and 6850 transitions. [2021-08-06 15:25:34,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:34,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:34,256 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] [2021-08-06 15:25:34,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-06 15:25:34,468 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 [2021-08-06 15:25:34,469 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:34,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:34,469 INFO L82 PathProgramCache]: Analyzing trace with hash 631833332, now seen corresponding path program 21 times [2021-08-06 15:25:34,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:34,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539010090] [2021-08-06 15:25:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:34,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:34,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:34,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539010090] [2021-08-06 15:25:34,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539010090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:34,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646179155] [2021-08-06 15:25:34,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:25:34,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:34,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:34,930 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) [2021-08-06 15:25:34,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 15:25:37,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:25:37,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:37,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:25:37,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:38,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:25:38,924 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 114 treesize of output 96 [2021-08-06 15:25:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:39,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646179155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:39,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:39,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-06 15:25:39,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449533222] [2021-08-06 15:25:39,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:25:39,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:39,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:25:39,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:25:39,753 INFO L87 Difference]: Start difference. First operand 2014 states and 6850 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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) [2021-08-06 15:25:41,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:41,970 INFO L93 Difference]: Finished difference Result 2837 states and 9262 transitions. [2021-08-06 15:25:41,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 15:25:41,970 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 26 [2021-08-06 15:25:41,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:41,975 INFO L225 Difference]: With dead ends: 2837 [2021-08-06 15:25:41,975 INFO L226 Difference]: Without dead ends: 2792 [2021-08-06 15:25:41,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1944.2ms TimeCoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:25:41,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2021-08-06 15:25:42,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2046. [2021-08-06 15:25:42,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 2045 states have (on average 3.406356968215159) internal successors, (6966), 2045 states have internal predecessors, (6966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 6966 transitions. [2021-08-06 15:25:42,006 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 6966 transitions. Word has length 26 [2021-08-06 15:25:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:42,006 INFO L470 AbstractCegarLoop]: Abstraction has 2046 states and 6966 transitions. [2021-08-06 15:25:42,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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) [2021-08-06 15:25:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 6966 transitions. [2021-08-06 15:25:42,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:42,009 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:42,009 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] [2021-08-06 15:25:42,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 15:25:42,230 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 [2021-08-06 15:25:42,230 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:42,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:42,230 INFO L82 PathProgramCache]: Analyzing trace with hash -985699448, now seen corresponding path program 22 times [2021-08-06 15:25:42,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:42,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368845069] [2021-08-06 15:25:42,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:42,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:42,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:42,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368845069] [2021-08-06 15:25:42,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368845069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:42,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282140222] [2021-08-06 15:25:42,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:25:42,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:42,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:42,629 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) [2021-08-06 15:25:42,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 15:25:45,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:25:45,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:45,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:25:45,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:46,386 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:25:46,386 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 120 treesize of output 102 [2021-08-06 15:25:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:47,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282140222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:47,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:47,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:25:47,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214893311] [2021-08-06 15:25:47,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:25:47,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:47,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:25:47,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:25:47,414 INFO L87 Difference]: Start difference. First operand 2046 states and 6966 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:25:49,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:49,111 INFO L93 Difference]: Finished difference Result 3111 states and 10242 transitions. [2021-08-06 15:25:49,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:25:49,111 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:25:49,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:49,116 INFO L225 Difference]: With dead ends: 3111 [2021-08-06 15:25:49,116 INFO L226 Difference]: Without dead ends: 3077 [2021-08-06 15:25:49,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1540.5ms TimeCoverageRelationStatistics Valid=332, Invalid=1308, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:25:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2021-08-06 15:25:49,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 2049. [2021-08-06 15:25:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.40966796875) internal successors, (6983), 2048 states have internal predecessors, (6983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6983 transitions. [2021-08-06 15:25:49,165 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6983 transitions. Word has length 26 [2021-08-06 15:25:49,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:49,165 INFO L470 AbstractCegarLoop]: Abstraction has 2049 states and 6983 transitions. [2021-08-06 15:25:49,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:25:49,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6983 transitions. [2021-08-06 15:25:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:49,168 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:49,168 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] [2021-08-06 15:25:49,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-06 15:25:49,368 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 [2021-08-06 15:25:49,369 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:49,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1619324944, now seen corresponding path program 23 times [2021-08-06 15:25:49,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:49,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795438078] [2021-08-06 15:25:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:49,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:49,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:49,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795438078] [2021-08-06 15:25:49,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795438078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:49,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451836493] [2021-08-06 15:25:49,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:25:49,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:49,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:49,881 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) [2021-08-06 15:25:49,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 15:25:53,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:25:53,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:53,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:25:53,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:53,657 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:25:53,657 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 118 treesize of output 100 [2021-08-06 15:25:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:54,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451836493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:54,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:54,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:25:54,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644178799] [2021-08-06 15:25:54,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:25:54,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:54,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:25:54,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:25:54,669 INFO L87 Difference]: Start difference. First operand 2049 states and 6983 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:56,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:56,059 INFO L93 Difference]: Finished difference Result 2681 states and 8959 transitions. [2021-08-06 15:25:56,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:25:56,060 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:25:56,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:56,064 INFO L225 Difference]: With dead ends: 2681 [2021-08-06 15:25:56,065 INFO L226 Difference]: Without dead ends: 2656 [2021-08-06 15:25:56,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1303.9ms TimeCoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:25:56,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-08-06 15:25:56,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2051. [2021-08-06 15:25:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.411219512195122) internal successors, (6993), 2050 states have internal predecessors, (6993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6993 transitions. [2021-08-06 15:25:56,095 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6993 transitions. Word has length 26 [2021-08-06 15:25:56,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:56,095 INFO L470 AbstractCegarLoop]: Abstraction has 2051 states and 6993 transitions. [2021-08-06 15:25:56,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:56,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6993 transitions. [2021-08-06 15:25:56,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:56,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:56,098 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] [2021-08-06 15:25:56,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 15:25:56,322 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 [2021-08-06 15:25:56,323 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:56,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:56,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1000054648, now seen corresponding path program 48 times [2021-08-06 15:25:56,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:56,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848347416] [2021-08-06 15:25:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:56,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:25:56,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:56,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848347416] [2021-08-06 15:25:56,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848347416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:56,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132689160] [2021-08-06 15:25:56,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:25:56,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:56,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:56,725 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) [2021-08-06 15:25:56,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 15:25:59,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:25:59,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:59,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:25:59,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:00,622 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:26:00,622 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 116 treesize of output 82 [2021-08-06 15:26:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:00,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132689160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:00,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:00,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 15:26:00,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024012938] [2021-08-06 15:26:00,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:26:00,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:00,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:26:00,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:26:00,775 INFO L87 Difference]: Start difference. First operand 2051 states and 6993 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:26:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:02,036 INFO L93 Difference]: Finished difference Result 2544 states and 8469 transitions. [2021-08-06 15:26:02,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:26:02,037 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-08-06 15:26:02,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:02,041 INFO L225 Difference]: With dead ends: 2544 [2021-08-06 15:26:02,041 INFO L226 Difference]: Without dead ends: 2522 [2021-08-06 15:26:02,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1185.9ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:26:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2021-08-06 15:26:02,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 2041. [2021-08-06 15:26:02,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4098039215686273) internal successors, (6956), 2040 states have internal predecessors, (6956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 6956 transitions. [2021-08-06 15:26:02,069 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 6956 transitions. Word has length 26 [2021-08-06 15:26:02,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:02,069 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 6956 transitions. [2021-08-06 15:26:02,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:26:02,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 6956 transitions. [2021-08-06 15:26:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:02,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:02,072 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] [2021-08-06 15:26:02,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:02,284 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 [2021-08-06 15:26:02,285 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:02,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:02,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1147620112, now seen corresponding path program 49 times [2021-08-06 15:26:02,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:02,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235694944] [2021-08-06 15:26:02,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:02,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:02,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:02,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235694944] [2021-08-06 15:26:02,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235694944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:02,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281636070] [2021-08-06 15:26:02,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:26:02,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:02,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:02,609 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) [2021-08-06 15:26:02,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 15:26:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:05,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:26:05,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:06,421 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:26:06,421 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 120 treesize of output 82 [2021-08-06 15:26:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:06,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281636070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:06,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:06,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 15:26:06,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79785380] [2021-08-06 15:26:06,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:26:06,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:06,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:26:06,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:26:06,606 INFO L87 Difference]: Start difference. First operand 2041 states and 6956 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:26:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:08,915 INFO L93 Difference]: Finished difference Result 2881 states and 9537 transitions. [2021-08-06 15:26:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:26:08,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-08-06 15:26:08,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:08,921 INFO L225 Difference]: With dead ends: 2881 [2021-08-06 15:26:08,921 INFO L226 Difference]: Without dead ends: 2866 [2021-08-06 15:26:08,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 2007.9ms TimeCoverageRelationStatistics Valid=564, Invalid=2298, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 15:26:08,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2021-08-06 15:26:08,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2041. [2021-08-06 15:26:08,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4098039215686273) internal successors, (6956), 2040 states have internal predecessors, (6956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:08,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 6956 transitions. [2021-08-06 15:26:08,952 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 6956 transitions. Word has length 26 [2021-08-06 15:26:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:08,952 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 6956 transitions. [2021-08-06 15:26:08,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:26:08,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 6956 transitions. [2021-08-06 15:26:08,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:08,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:08,956 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] [2021-08-06 15:26:08,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:09,168 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 [2021-08-06 15:26:09,169 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:09,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:09,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1576521584, now seen corresponding path program 50 times [2021-08-06 15:26:09,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:09,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741957225] [2021-08-06 15:26:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:09,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:09,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:09,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741957225] [2021-08-06 15:26:09,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741957225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:09,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594458792] [2021-08-06 15:26:09,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:26:09,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:09,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:09,400 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) [2021-08-06 15:26:09,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 15:26:12,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:26:12,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:12,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:26:12,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:13,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:26:13,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:26:13,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:26:13,159 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 116 treesize of output 96 [2021-08-06 15:26:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:14,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594458792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:14,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:14,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-08-06 15:26:14,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944913164] [2021-08-06 15:26:14,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:26:14,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:14,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:26:14,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:26:14,432 INFO L87 Difference]: Start difference. First operand 2041 states and 6956 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:17,299 INFO L93 Difference]: Finished difference Result 3479 states and 11334 transitions. [2021-08-06 15:26:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 15:26:17,300 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:26:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:17,305 INFO L225 Difference]: With dead ends: 3479 [2021-08-06 15:26:17,305 INFO L226 Difference]: Without dead ends: 3443 [2021-08-06 15:26:17,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 2455.2ms TimeCoverageRelationStatistics Valid=783, Invalid=2999, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 15:26:17,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3443 states. [2021-08-06 15:26:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3443 to 2139. [2021-08-06 15:26:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 3.4242282507015904) internal successors, (7321), 2138 states have internal predecessors, (7321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 7321 transitions. [2021-08-06 15:26:17,340 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 7321 transitions. Word has length 26 [2021-08-06 15:26:17,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:17,341 INFO L470 AbstractCegarLoop]: Abstraction has 2139 states and 7321 transitions. [2021-08-06 15:26:17,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:17,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 7321 transitions. [2021-08-06 15:26:17,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:17,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:17,343 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] [2021-08-06 15:26:17,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:17,569 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 [2021-08-06 15:26:17,569 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:17,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:17,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1954161356, now seen corresponding path program 51 times [2021-08-06 15:26:17,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:17,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838732979] [2021-08-06 15:26:17,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:17,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:17,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:17,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838732979] [2021-08-06 15:26:17,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838732979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:17,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88966392] [2021-08-06 15:26:17,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:26:17,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:17,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:17,929 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) [2021-08-06 15:26:17,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 15:26:21,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:26:21,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:21,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:26:21,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:21,990 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-08-06 15:26:21,990 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 122 treesize of output 110 [2021-08-06 15:26:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:24,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88966392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:24,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:24,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 15:26:24,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916616999] [2021-08-06 15:26:24,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:26:24,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:24,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:26:24,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:26:24,093 INFO L87 Difference]: Start difference. First operand 2139 states and 7321 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) [2021-08-06 15:26:27,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:27,308 INFO L93 Difference]: Finished difference Result 3378 states and 10967 transitions. [2021-08-06 15:26:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:26:27,308 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 26 [2021-08-06 15:26:27,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:27,313 INFO L225 Difference]: With dead ends: 3378 [2021-08-06 15:26:27,313 INFO L226 Difference]: Without dead ends: 3348 [2021-08-06 15:26:27,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 2701.4ms TimeCoverageRelationStatistics Valid=641, Invalid=3391, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:26:27,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-08-06 15:26:27,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 2139. [2021-08-06 15:26:27,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 3.4242282507015904) internal successors, (7321), 2138 states have internal predecessors, (7321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:27,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 7321 transitions. [2021-08-06 15:26:27,351 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 7321 transitions. Word has length 26 [2021-08-06 15:26:27,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:27,351 INFO L470 AbstractCegarLoop]: Abstraction has 2139 states and 7321 transitions. [2021-08-06 15:26:27,351 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) [2021-08-06 15:26:27,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 7321 transitions. [2021-08-06 15:26:27,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:27,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:27,354 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] [2021-08-06 15:26:27,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:27,569 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 [2021-08-06 15:26:27,569 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:27,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:27,569 INFO L82 PathProgramCache]: Analyzing trace with hash 933591496, now seen corresponding path program 52 times [2021-08-06 15:26:27,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:27,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023039853] [2021-08-06 15:26:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:27,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:28,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:28,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023039853] [2021-08-06 15:26:28,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023039853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:28,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711286521] [2021-08-06 15:26:28,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:26:28,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:28,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:28,059 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) [2021-08-06 15:26:28,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 15:26:31,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:26:31,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:31,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:26:31,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:32,007 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:26:32,007 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 122 treesize of output 82 [2021-08-06 15:26:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:32,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711286521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:32,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:32,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 15:26:32,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158230074] [2021-08-06 15:26:32,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:26:32,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:32,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:26:32,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:26:32,152 INFO L87 Difference]: Start difference. First operand 2139 states and 7321 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:26:34,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:34,083 INFO L93 Difference]: Finished difference Result 2771 states and 9225 transitions. [2021-08-06 15:26:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:26:34,083 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-08-06 15:26:34,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:34,088 INFO L225 Difference]: With dead ends: 2771 [2021-08-06 15:26:34,088 INFO L226 Difference]: Without dead ends: 2756 [2021-08-06 15:26:34,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1671.8ms TimeCoverageRelationStatistics Valid=433, Invalid=1823, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:26:34,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-08-06 15:26:34,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2127. [2021-08-06 15:26:34,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 2126 states have (on average 3.4238005644402634) internal successors, (7279), 2126 states have internal predecessors, (7279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 7279 transitions. [2021-08-06 15:26:34,120 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 7279 transitions. Word has length 26 [2021-08-06 15:26:34,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:34,120 INFO L470 AbstractCegarLoop]: Abstraction has 2127 states and 7279 transitions. [2021-08-06 15:26:34,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:26:34,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 7279 transitions. [2021-08-06 15:26:34,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:34,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:34,123 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] [2021-08-06 15:26:34,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:34,349 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 [2021-08-06 15:26:34,349 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:34,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:34,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2036868108, now seen corresponding path program 24 times [2021-08-06 15:26:34,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:34,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043689648] [2021-08-06 15:26:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:34,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:34,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:34,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043689648] [2021-08-06 15:26:34,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043689648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:34,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882461849] [2021-08-06 15:26:34,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:26:34,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:34,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:34,682 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) [2021-08-06 15:26:34,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 15:26:38,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:26:38,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:38,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:26:38,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:38,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:26:38,996 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 112 treesize of output 94 [2021-08-06 15:26:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:40,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882461849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:40,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:40,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:26:40,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474704642] [2021-08-06 15:26:40,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:26:40,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:40,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:26:40,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:26:40,055 INFO L87 Difference]: Start difference. First operand 2127 states and 7279 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:43,545 INFO L93 Difference]: Finished difference Result 3210 states and 10413 transitions. [2021-08-06 15:26:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:26:43,545 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:26:43,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:43,550 INFO L225 Difference]: With dead ends: 3210 [2021-08-06 15:26:43,550 INFO L226 Difference]: Without dead ends: 3165 [2021-08-06 15:26:43,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 3081.1ms TimeCoverageRelationStatistics Valid=415, Invalid=2447, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 15:26:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2021-08-06 15:26:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 2131. [2021-08-06 15:26:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2130 states have (on average 3.424882629107981) internal successors, (7295), 2130 states have internal predecessors, (7295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 7295 transitions. [2021-08-06 15:26:43,582 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 7295 transitions. Word has length 26 [2021-08-06 15:26:43,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:43,583 INFO L470 AbstractCegarLoop]: Abstraction has 2131 states and 7295 transitions. [2021-08-06 15:26:43,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:43,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 7295 transitions. [2021-08-06 15:26:43,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:43,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:43,586 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] [2021-08-06 15:26:43,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:43,812 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 [2021-08-06 15:26:43,812 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:43,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:43,812 INFO L82 PathProgramCache]: Analyzing trace with hash 152880388, now seen corresponding path program 25 times [2021-08-06 15:26:43,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:43,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163732211] [2021-08-06 15:26:43,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:43,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:44,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:44,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163732211] [2021-08-06 15:26:44,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163732211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:44,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000967246] [2021-08-06 15:26:44,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:26:44,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:44,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:44,107 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) [2021-08-06 15:26:44,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 15:26:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:47,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:26:47,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:48,364 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:26:48,364 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 110 treesize of output 79 [2021-08-06 15:26:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:48,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000967246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:48,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:48,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 15:26:48,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359506341] [2021-08-06 15:26:48,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:26:48,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:48,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:26:48,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:26:48,522 INFO L87 Difference]: Start difference. First operand 2131 states and 7295 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-08-06 15:26:48,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:48,851 INFO L93 Difference]: Finished difference Result 2438 states and 8238 transitions. [2021-08-06 15:26:48,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 15:26:48,851 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 [2021-08-06 15:26:48,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:48,855 INFO L225 Difference]: With dead ends: 2438 [2021-08-06 15:26:48,855 INFO L226 Difference]: Without dead ends: 2423 [2021-08-06 15:26:48,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 383.3ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:26:48,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-08-06 15:26:48,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2131. [2021-08-06 15:26:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2130 states have (on average 3.424882629107981) internal successors, (7295), 2130 states have internal predecessors, (7295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 7295 transitions. [2021-08-06 15:26:48,880 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 7295 transitions. Word has length 26 [2021-08-06 15:26:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:48,881 INFO L470 AbstractCegarLoop]: Abstraction has 2131 states and 7295 transitions. [2021-08-06 15:26:48,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-08-06 15:26:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 7295 transitions. [2021-08-06 15:26:48,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:48,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:48,883 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] [2021-08-06 15:26:48,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:49,109 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 [2021-08-06 15:26:49,109 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:49,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1914635640, now seen corresponding path program 26 times [2021-08-06 15:26:49,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:49,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952178162] [2021-08-06 15:26:49,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:49,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:49,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:49,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952178162] [2021-08-06 15:26:49,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952178162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:49,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414050236] [2021-08-06 15:26:49,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:26:49,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:49,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:49,324 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) [2021-08-06 15:26:49,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 15:26:53,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:26:53,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:53,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:26:53,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:53,637 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:26:53,637 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 112 treesize of output 86 [2021-08-06 15:26:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:54,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414050236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:54,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:54,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 15:26:54,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300642041] [2021-08-06 15:26:54,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:26:54,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:54,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:26:54,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:26:54,053 INFO L87 Difference]: Start difference. First operand 2131 states and 7295 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:55,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:55,232 INFO L93 Difference]: Finished difference Result 3274 states and 10859 transitions. [2021-08-06 15:26:55,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:26:55,233 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:26:55,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:55,238 INFO L225 Difference]: With dead ends: 3274 [2021-08-06 15:26:55,238 INFO L226 Difference]: Without dead ends: 3244 [2021-08-06 15:26:55,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1103.0ms TimeCoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 15:26:55,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2021-08-06 15:26:55,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 2143. [2021-08-06 15:26:55,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.4281045751633985) internal successors, (7343), 2142 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:55,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7343 transitions. [2021-08-06 15:26:55,271 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7343 transitions. Word has length 26 [2021-08-06 15:26:55,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:55,271 INFO L470 AbstractCegarLoop]: Abstraction has 2143 states and 7343 transitions. [2021-08-06 15:26:55,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:55,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7343 transitions. [2021-08-06 15:26:55,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:55,274 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:55,275 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] [2021-08-06 15:26:55,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 15:26:55,475 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 [2021-08-06 15:26:55,475 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:55,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:55,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1844404920, now seen corresponding path program 27 times [2021-08-06 15:26:55,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:55,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75564775] [2021-08-06 15:26:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:55,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:55,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:55,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75564775] [2021-08-06 15:26:55,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75564775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:55,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849005538] [2021-08-06 15:26:55,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:26:55,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:55,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:55,881 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) [2021-08-06 15:26:55,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 15:26:59,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:26:59,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:59,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:26:59,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:01,951 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-06 15:27:01,951 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 113 treesize of output 82 [2021-08-06 15:27:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:02,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849005538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:02,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:02,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:27:02,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453354717] [2021-08-06 15:27:02,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:27:02,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:02,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:27:02,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:27:02,127 INFO L87 Difference]: Start difference. First operand 2143 states and 7343 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-08-06 15:27:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:03,202 INFO L93 Difference]: Finished difference Result 3158 states and 10409 transitions. [2021-08-06 15:27:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:27:03,202 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 26 [2021-08-06 15:27:03,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:03,207 INFO L225 Difference]: With dead ends: 3158 [2021-08-06 15:27:03,207 INFO L226 Difference]: Without dead ends: 3113 [2021-08-06 15:27:03,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 929.3ms TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:27:03,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3113 states. [2021-08-06 15:27:03,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3113 to 2151. [2021-08-06 15:27:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 3.4293023255813955) internal successors, (7373), 2150 states have internal predecessors, (7373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:03,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 7373 transitions. [2021-08-06 15:27:03,239 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 7373 transitions. Word has length 26 [2021-08-06 15:27:03,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:03,239 INFO L470 AbstractCegarLoop]: Abstraction has 2151 states and 7373 transitions. [2021-08-06 15:27:03,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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) [2021-08-06 15:27:03,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 7373 transitions. [2021-08-06 15:27:03,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:03,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:03,242 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] [2021-08-06 15:27:03,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 15:27:03,468 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 [2021-08-06 15:27:03,469 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:03,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:03,469 INFO L82 PathProgramCache]: Analyzing trace with hash 833029596, now seen corresponding path program 28 times [2021-08-06 15:27:03,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:03,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791472032] [2021-08-06 15:27:03,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:03,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:03,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:03,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791472032] [2021-08-06 15:27:03,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791472032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:03,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109689201] [2021-08-06 15:27:03,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:27:03,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:03,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:03,729 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) [2021-08-06 15:27:03,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 15:27:07,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:27:07,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:07,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:27:07,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:08,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:27:08,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:27:08,184 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 104 treesize of output 78 [2021-08-06 15:27:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:08,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109689201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:08,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:08,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:27:08,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730180674] [2021-08-06 15:27:08,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:27:08,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:08,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:27:08,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:27:08,808 INFO L87 Difference]: Start difference. First operand 2151 states and 7373 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:10,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:10,350 INFO L93 Difference]: Finished difference Result 3326 states and 10995 transitions. [2021-08-06 15:27:10,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:27:10,350 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:27:10,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:10,356 INFO L225 Difference]: With dead ends: 3326 [2021-08-06 15:27:10,356 INFO L226 Difference]: Without dead ends: 3296 [2021-08-06 15:27:10,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1438.8ms TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:27:10,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2021-08-06 15:27:10,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 2136. [2021-08-06 15:27:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 3.4252927400468383) internal successors, (7313), 2135 states have internal predecessors, (7313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:10,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 7313 transitions. [2021-08-06 15:27:10,389 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 7313 transitions. Word has length 26 [2021-08-06 15:27:10,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:10,389 INFO L470 AbstractCegarLoop]: Abstraction has 2136 states and 7313 transitions. [2021-08-06 15:27:10,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:10,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 7313 transitions. [2021-08-06 15:27:10,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:10,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:10,392 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, 1, 1] [2021-08-06 15:27:10,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:10,617 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 [2021-08-06 15:27:10,617 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:10,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:10,617 INFO L82 PathProgramCache]: Analyzing trace with hash -216803376, now seen corresponding path program 29 times [2021-08-06 15:27:10,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:10,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247534908] [2021-08-06 15:27:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:10,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:10,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:10,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247534908] [2021-08-06 15:27:10,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247534908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:10,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686278952] [2021-08-06 15:27:10,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:27:10,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:10,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:10,854 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) [2021-08-06 15:27:10,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 15:27:14,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:27:14,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:14,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:27:14,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:16,050 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-06 15:27:16,050 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 115 treesize of output 84 [2021-08-06 15:27:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:16,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686278952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:16,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:16,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:27:16,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697347757] [2021-08-06 15:27:16,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:27:16,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:16,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:27:16,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:27:16,136 INFO L87 Difference]: Start difference. First operand 2136 states and 7313 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:16,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:16,704 INFO L93 Difference]: Finished difference Result 2651 states and 8899 transitions. [2021-08-06 15:27:16,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:27:16,704 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:27:16,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:16,709 INFO L225 Difference]: With dead ends: 2651 [2021-08-06 15:27:16,709 INFO L226 Difference]: Without dead ends: 2636 [2021-08-06 15:27:16,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 545.2ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:27:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-08-06 15:27:16,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2113. [2021-08-06 15:27:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.425662878787879) internal successors, (7235), 2112 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:16,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 7235 transitions. [2021-08-06 15:27:16,738 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 7235 transitions. Word has length 26 [2021-08-06 15:27:16,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:16,738 INFO L470 AbstractCegarLoop]: Abstraction has 2113 states and 7235 transitions. [2021-08-06 15:27:16,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 7235 transitions. [2021-08-06 15:27:16,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:16,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:16,741 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] [2021-08-06 15:27:16,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:16,956 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 [2021-08-06 15:27:16,957 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:16,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:16,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1298273478, now seen corresponding path program 30 times [2021-08-06 15:27:16,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:16,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729201944] [2021-08-06 15:27:16,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:16,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:17,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:17,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729201944] [2021-08-06 15:27:17,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729201944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:17,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907052133] [2021-08-06 15:27:17,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:27:17,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:17,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:17,158 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) [2021-08-06 15:27:17,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 15:27:21,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:27:21,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:21,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:27:21,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:21,749 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:27:21,750 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 118 treesize of output 100 [2021-08-06 15:27:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:22,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907052133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:22,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:22,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-06 15:27:22,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713472213] [2021-08-06 15:27:22,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:27:22,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:22,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:27:22,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:27:22,541 INFO L87 Difference]: Start difference. First operand 2113 states and 7235 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:23,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:23,308 INFO L93 Difference]: Finished difference Result 2381 states and 8013 transitions. [2021-08-06 15:27:23,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:27:23,308 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:27:23,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:23,313 INFO L225 Difference]: With dead ends: 2381 [2021-08-06 15:27:23,313 INFO L226 Difference]: Without dead ends: 2366 [2021-08-06 15:27:23,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 735.3ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:27:23,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2021-08-06 15:27:23,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 2085. [2021-08-06 15:27:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2085 states, 2084 states have (on average 3.43042226487524) internal successors, (7149), 2084 states have internal predecessors, (7149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 7149 transitions. [2021-08-06 15:27:23,347 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 7149 transitions. Word has length 26 [2021-08-06 15:27:23,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:23,347 INFO L470 AbstractCegarLoop]: Abstraction has 2085 states and 7149 transitions. [2021-08-06 15:27:23,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:23,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 7149 transitions. [2021-08-06 15:27:23,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:23,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:23,350 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] [2021-08-06 15:27:23,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:23,564 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 [2021-08-06 15:27:23,565 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:23,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:23,565 INFO L82 PathProgramCache]: Analyzing trace with hash 367617680, now seen corresponding path program 31 times [2021-08-06 15:27:23,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:23,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73707556] [2021-08-06 15:27:23,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:23,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:23,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:23,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73707556] [2021-08-06 15:27:23,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73707556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:23,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084104200] [2021-08-06 15:27:23,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:27:23,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:23,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:23,868 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) [2021-08-06 15:27:23,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 15:27:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:27,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:27:27,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:28,481 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:27:28,481 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 112 treesize of output 86 [2021-08-06 15:27:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:28,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084104200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:28,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:28,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 15:27:28,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099148398] [2021-08-06 15:27:28,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:27:28,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:28,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:27:28,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:27:28,956 INFO L87 Difference]: Start difference. First operand 2085 states and 7149 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:29,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:29,633 INFO L93 Difference]: Finished difference Result 2823 states and 9423 transitions. [2021-08-06 15:27:29,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:27:29,634 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:27:29,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:29,638 INFO L225 Difference]: With dead ends: 2823 [2021-08-06 15:27:29,638 INFO L226 Difference]: Without dead ends: 2777 [2021-08-06 15:27:29,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 581.8ms TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:27:29,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2021-08-06 15:27:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 2073. [2021-08-06 15:27:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 2072 states have (on average 3.430019305019305) internal successors, (7107), 2072 states have internal predecessors, (7107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:29,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 7107 transitions. [2021-08-06 15:27:29,669 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 7107 transitions. Word has length 26 [2021-08-06 15:27:29,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:29,670 INFO L470 AbstractCegarLoop]: Abstraction has 2073 states and 7107 transitions. [2021-08-06 15:27:29,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:29,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 7107 transitions. [2021-08-06 15:27:29,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:29,673 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:29,673 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] [2021-08-06 15:27:29,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:29,888 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 [2021-08-06 15:27:29,889 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:29,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:29,889 INFO L82 PathProgramCache]: Analyzing trace with hash -574976500, now seen corresponding path program 32 times [2021-08-06 15:27:29,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:29,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429947548] [2021-08-06 15:27:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:29,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:30,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:30,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429947548] [2021-08-06 15:27:30,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429947548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:30,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416994647] [2021-08-06 15:27:30,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:27:30,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:30,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:30,075 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) [2021-08-06 15:27:30,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 15:27:34,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:27:34,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:34,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:27:34,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:35,251 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:27:35,251 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 110 treesize of output 79 [2021-08-06 15:27:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:35,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416994647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:35,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:35,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:27:35,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633474116] [2021-08-06 15:27:35,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:27:35,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:35,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:27:35,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:27:35,365 INFO L87 Difference]: Start difference. First operand 2073 states and 7107 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:36,062 INFO L93 Difference]: Finished difference Result 2694 states and 9032 transitions. [2021-08-06 15:27:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:27:36,063 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:27:36,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:36,067 INFO L225 Difference]: With dead ends: 2694 [2021-08-06 15:27:36,067 INFO L226 Difference]: Without dead ends: 2679 [2021-08-06 15:27:36,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 744.7ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:27:36,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2021-08-06 15:27:36,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 2106. [2021-08-06 15:27:36,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 2105 states have (on average 3.430403800475059) internal successors, (7221), 2105 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 7221 transitions. [2021-08-06 15:27:36,135 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 7221 transitions. Word has length 26 [2021-08-06 15:27:36,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:36,135 INFO L470 AbstractCegarLoop]: Abstraction has 2106 states and 7221 transitions. [2021-08-06 15:27:36,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:36,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 7221 transitions. [2021-08-06 15:27:36,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:36,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:36,139 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] [2021-08-06 15:27:36,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:36,339 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 [2021-08-06 15:27:36,339 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:36,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:36,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1484665676, now seen corresponding path program 33 times [2021-08-06 15:27:36,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:36,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134164104] [2021-08-06 15:27:36,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:36,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:36,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:36,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134164104] [2021-08-06 15:27:36,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134164104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:36,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504623402] [2021-08-06 15:27:36,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:27:36,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:36,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:36,544 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) [2021-08-06 15:27:36,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 15:27:40,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:27:40,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:40,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:27:40,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:41,295 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:27:41,295 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 112 treesize of output 86 [2021-08-06 15:27:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:41,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504623402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:41,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:41,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 15:27:41,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449633914] [2021-08-06 15:27:41,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:27:41,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:41,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:27:41,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:27:41,699 INFO L87 Difference]: Start difference. First operand 2106 states and 7221 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:42,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:42,403 INFO L93 Difference]: Finished difference Result 2938 states and 9843 transitions. [2021-08-06 15:27:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:27:42,404 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:27:42,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:42,408 INFO L225 Difference]: With dead ends: 2938 [2021-08-06 15:27:42,408 INFO L226 Difference]: Without dead ends: 2923 [2021-08-06 15:27:42,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 657.2ms TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:27:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2021-08-06 15:27:42,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2118. [2021-08-06 15:27:42,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 2117 states have (on average 3.425129900803023) internal successors, (7251), 2117 states have internal predecessors, (7251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 7251 transitions. [2021-08-06 15:27:42,440 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 7251 transitions. Word has length 26 [2021-08-06 15:27:42,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:42,440 INFO L470 AbstractCegarLoop]: Abstraction has 2118 states and 7251 transitions. [2021-08-06 15:27:42,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:42,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 7251 transitions. [2021-08-06 15:27:42,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:42,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:42,443 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] [2021-08-06 15:27:42,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-06 15:27:42,668 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 [2021-08-06 15:27:42,669 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:42,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:42,669 INFO L82 PathProgramCache]: Analyzing trace with hash -444012144, now seen corresponding path program 34 times [2021-08-06 15:27:42,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:42,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565002564] [2021-08-06 15:27:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:42,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:42,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:42,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565002564] [2021-08-06 15:27:42,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565002564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:42,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479110200] [2021-08-06 15:27:42,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:27:42,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:42,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:42,841 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) [2021-08-06 15:27:42,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 15:27:47,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:27:47,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:47,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:27:47,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:47,959 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:27:47,960 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 110 treesize of output 79 [2021-08-06 15:27:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:48,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479110200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:48,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:48,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:27:48,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708162990] [2021-08-06 15:27:48,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:27:48,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:48,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:27:48,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:27:48,122 INFO L87 Difference]: Start difference. First operand 2118 states and 7251 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:48,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:48,681 INFO L93 Difference]: Finished difference Result 2736 states and 9164 transitions. [2021-08-06 15:27:48,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:27:48,681 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:27:48,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:48,685 INFO L225 Difference]: With dead ends: 2736 [2021-08-06 15:27:48,685 INFO L226 Difference]: Without dead ends: 2706 [2021-08-06 15:27:48,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 540.3ms TimeCoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:27:48,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2021-08-06 15:27:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 2120. [2021-08-06 15:27:48,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.426616328456819) internal successors, (7261), 2119 states have internal predecessors, (7261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:48,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7261 transitions. [2021-08-06 15:27:48,714 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7261 transitions. Word has length 26 [2021-08-06 15:27:48,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:48,714 INFO L470 AbstractCegarLoop]: Abstraction has 2120 states and 7261 transitions. [2021-08-06 15:27:48,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:48,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7261 transitions. [2021-08-06 15:27:48,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:48,716 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:48,717 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] [2021-08-06 15:27:48,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:48,944 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 [2021-08-06 15:27:48,945 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:48,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:48,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1900543888, now seen corresponding path program 35 times [2021-08-06 15:27:48,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:48,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734527174] [2021-08-06 15:27:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:48,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:49,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:49,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734527174] [2021-08-06 15:27:49,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734527174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:49,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417437476] [2021-08-06 15:27:49,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:27:49,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:49,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:49,166 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) [2021-08-06 15:27:49,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 15:27:53,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:27:53,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:53,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:27:53,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:54,258 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:27:54,258 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 110 treesize of output 79 [2021-08-06 15:27:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:54,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417437476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:54,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:54,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:27:54,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367661293] [2021-08-06 15:27:54,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:27:54,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:54,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:27:54,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:27:54,430 INFO L87 Difference]: Start difference. First operand 2120 states and 7261 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:55,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:55,010 INFO L93 Difference]: Finished difference Result 2769 states and 9264 transitions. [2021-08-06 15:27:55,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:27:55,010 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:27:55,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:55,015 INFO L225 Difference]: With dead ends: 2769 [2021-08-06 15:27:55,015 INFO L226 Difference]: Without dead ends: 2739 [2021-08-06 15:27:55,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 528.2ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:27:55,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2021-08-06 15:27:55,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 2138. [2021-08-06 15:27:55,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 3.4230229293401964) internal successors, (7315), 2137 states have internal predecessors, (7315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:55,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 7315 transitions. [2021-08-06 15:27:55,043 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 7315 transitions. Word has length 26 [2021-08-06 15:27:55,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:55,043 INFO L470 AbstractCegarLoop]: Abstraction has 2138 states and 7315 transitions. [2021-08-06 15:27:55,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:55,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 7315 transitions. [2021-08-06 15:27:55,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:55,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:55,046 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] [2021-08-06 15:27:55,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:55,260 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 [2021-08-06 15:27:55,261 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:55,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:55,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1595082124, now seen corresponding path program 36 times [2021-08-06 15:27:55,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:55,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329296660] [2021-08-06 15:27:55,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:55,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:55,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:55,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329296660] [2021-08-06 15:27:55,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329296660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:55,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248136744] [2021-08-06 15:27:55,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:27:55,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:55,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:55,504 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) [2021-08-06 15:27:55,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 15:27:59,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:27:59,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:59,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:27:59,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:00,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:28:00,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:28:00,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:28:00,696 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 136 treesize of output 94 [2021-08-06 15:28:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:01,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248136744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:01,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:01,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:28:01,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221538688] [2021-08-06 15:28:01,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:28:01,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:01,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:28:01,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:28:01,093 INFO L87 Difference]: Start difference. First operand 2138 states and 7315 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:02,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:02,183 INFO L93 Difference]: Finished difference Result 2917 states and 9689 transitions. [2021-08-06 15:28:02,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:28:02,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:28:02,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:02,189 INFO L225 Difference]: With dead ends: 2917 [2021-08-06 15:28:02,189 INFO L226 Difference]: Without dead ends: 2860 [2021-08-06 15:28:02,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 933.4ms TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 15:28:02,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-08-06 15:28:02,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 2182. [2021-08-06 15:28:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 3.4195323246217333) internal successors, (7458), 2181 states have internal predecessors, (7458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 7458 transitions. [2021-08-06 15:28:02,225 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 7458 transitions. Word has length 26 [2021-08-06 15:28:02,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:02,225 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 7458 transitions. [2021-08-06 15:28:02,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 7458 transitions. [2021-08-06 15:28:02,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:02,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:02,228 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] [2021-08-06 15:28:02,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-06 15:28:02,444 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 [2021-08-06 15:28:02,445 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:02,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:02,445 INFO L82 PathProgramCache]: Analyzing trace with hash -607590512, now seen corresponding path program 37 times [2021-08-06 15:28:02,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:02,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711738517] [2021-08-06 15:28:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:02,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:02,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:02,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711738517] [2021-08-06 15:28:02,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711738517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:02,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461949747] [2021-08-06 15:28:02,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:28:02,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:02,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:02,685 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) [2021-08-06 15:28:02,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 15:28:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:07,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:28:07,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:07,714 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:28:07,714 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 120 treesize of output 102 [2021-08-06 15:28:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:08,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461949747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:08,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:08,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:28:08,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423798744] [2021-08-06 15:28:08,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:28:08,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:08,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:28:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:28:08,557 INFO L87 Difference]: Start difference. First operand 2182 states and 7458 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:09,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:09,408 INFO L93 Difference]: Finished difference Result 2797 states and 9387 transitions. [2021-08-06 15:28:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:28:09,408 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:28:09,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:09,413 INFO L225 Difference]: With dead ends: 2797 [2021-08-06 15:28:09,413 INFO L226 Difference]: Without dead ends: 2772 [2021-08-06 15:28:09,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 840.0ms TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:28:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2021-08-06 15:28:09,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 2182. [2021-08-06 15:28:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 3.4195323246217333) internal successors, (7458), 2181 states have internal predecessors, (7458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 7458 transitions. [2021-08-06 15:28:09,441 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 7458 transitions. Word has length 26 [2021-08-06 15:28:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:09,441 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 7458 transitions. [2021-08-06 15:28:09,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:09,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 7458 transitions. [2021-08-06 15:28:09,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:09,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:09,444 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] [2021-08-06 15:28:09,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:09,665 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 [2021-08-06 15:28:09,665 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:09,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:09,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1876950220, now seen corresponding path program 38 times [2021-08-06 15:28:09,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:09,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528567724] [2021-08-06 15:28:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:09,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:09,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:09,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528567724] [2021-08-06 15:28:09,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528567724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:09,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059140463] [2021-08-06 15:28:09,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:28:09,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:09,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:09,994 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) [2021-08-06 15:28:09,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 15:28:14,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:28:14,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:14,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:28:14,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:15,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:28:15,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:28:15,074 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 104 treesize of output 78 [2021-08-06 15:28:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:15,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059140463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:15,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:15,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:28:15,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944387717] [2021-08-06 15:28:15,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:28:15,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:15,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:28:15,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:28:15,582 INFO L87 Difference]: Start difference. First operand 2182 states and 7458 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:16,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:16,212 INFO L93 Difference]: Finished difference Result 2765 states and 9313 transitions. [2021-08-06 15:28:16,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:28:16,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:28:16,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:16,217 INFO L225 Difference]: With dead ends: 2765 [2021-08-06 15:28:16,217 INFO L226 Difference]: Without dead ends: 2750 [2021-08-06 15:28:16,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 677.9ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:28:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-08-06 15:28:16,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2182. [2021-08-06 15:28:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 3.4195323246217333) internal successors, (7458), 2181 states have internal predecessors, (7458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:16,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 7458 transitions. [2021-08-06 15:28:16,246 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 7458 transitions. Word has length 26 [2021-08-06 15:28:16,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:16,246 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 7458 transitions. [2021-08-06 15:28:16,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 7458 transitions. [2021-08-06 15:28:16,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:16,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:16,249 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] [2021-08-06 15:28:16,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:16,477 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 [2021-08-06 15:28:16,477 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:16,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:16,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1542258700, now seen corresponding path program 53 times [2021-08-06 15:28:16,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:16,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280753448] [2021-08-06 15:28:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:16,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:16,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:16,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280753448] [2021-08-06 15:28:16,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280753448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:16,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545109872] [2021-08-06 15:28:16,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:28:16,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:16,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:16,756 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) [2021-08-06 15:28:16,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 15:28:21,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:28:21,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:21,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:28:21,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:22,179 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:28:22,179 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 116 treesize of output 82 [2021-08-06 15:28:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:22,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545109872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:22,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:22,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-08-06 15:28:22,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218897271] [2021-08-06 15:28:22,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:28:22,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:22,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:28:22,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:28:22,285 INFO L87 Difference]: Start difference. First operand 2182 states and 7458 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) [2021-08-06 15:28:22,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:22,827 INFO L93 Difference]: Finished difference Result 2793 states and 9042 transitions. [2021-08-06 15:28:22,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:28:22,827 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 26 [2021-08-06 15:28:22,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:22,832 INFO L225 Difference]: With dead ends: 2793 [2021-08-06 15:28:22,832 INFO L226 Difference]: Without dead ends: 2756 [2021-08-06 15:28:22,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 516.9ms TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:28:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-08-06 15:28:22,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2206. [2021-08-06 15:28:22,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 3.419501133786848) internal successors, (7540), 2205 states have internal predecessors, (7540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:22,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 7540 transitions. [2021-08-06 15:28:22,863 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 7540 transitions. Word has length 26 [2021-08-06 15:28:22,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:22,863 INFO L470 AbstractCegarLoop]: Abstraction has 2206 states and 7540 transitions. [2021-08-06 15:28:22,863 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) [2021-08-06 15:28:22,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 7540 transitions. [2021-08-06 15:28:22,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:22,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:22,866 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] [2021-08-06 15:28:22,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:23,083 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 [2021-08-06 15:28:23,083 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:23,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:23,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1684834032, now seen corresponding path program 54 times [2021-08-06 15:28:23,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:23,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341073286] [2021-08-06 15:28:23,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:23,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:23,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:23,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341073286] [2021-08-06 15:28:23,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341073286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:23,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235371619] [2021-08-06 15:28:23,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:28:23,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:23,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:23,305 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) [2021-08-06 15:28:23,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 15:28:27,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:28:27,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:27,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:28:27,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:28,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2021-08-06 15:28:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:28,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235371619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:28,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:28,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 15:28:28,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713645110] [2021-08-06 15:28:28,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:28:28,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:28,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:28:28,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:28:28,556 INFO L87 Difference]: Start difference. First operand 2206 states and 7540 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:29,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:29,334 INFO L93 Difference]: Finished difference Result 2729 states and 9110 transitions. [2021-08-06 15:28:29,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:28:29,334 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:28:29,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:29,340 INFO L225 Difference]: With dead ends: 2729 [2021-08-06 15:28:29,340 INFO L226 Difference]: Without dead ends: 2683 [2021-08-06 15:28:29,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 655.0ms TimeCoverageRelationStatistics Valid=296, Invalid=1036, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 15:28:29,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2021-08-06 15:28:29,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 2200. [2021-08-06 15:28:29,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 3.4147339699863575) internal successors, (7509), 2199 states have internal predecessors, (7509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 7509 transitions. [2021-08-06 15:28:29,396 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 7509 transitions. Word has length 26 [2021-08-06 15:28:29,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:29,396 INFO L470 AbstractCegarLoop]: Abstraction has 2200 states and 7509 transitions. [2021-08-06 15:28:29,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:29,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 7509 transitions. [2021-08-06 15:28:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:29,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:29,400 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] [2021-08-06 15:28:29,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-06 15:28:29,617 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 [2021-08-06 15:28:29,618 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:29,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:29,618 INFO L82 PathProgramCache]: Analyzing trace with hash 952866832, now seen corresponding path program 55 times [2021-08-06 15:28:29,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:29,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688067451] [2021-08-06 15:28:29,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:29,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:29,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:29,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688067451] [2021-08-06 15:28:29,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688067451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:29,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104863768] [2021-08-06 15:28:29,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:28:29,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:29,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:29,999 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) [2021-08-06 15:28:30,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 15:28:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:34,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:28:34,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:35,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2021-08-06 15:28:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:35,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104863768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:35,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:35,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-08-06 15:28:35,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145066321] [2021-08-06 15:28:35,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:28:35,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:35,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:28:35,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:28:35,312 INFO L87 Difference]: Start difference. First operand 2200 states and 7509 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) [2021-08-06 15:28:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:35,752 INFO L93 Difference]: Finished difference Result 2680 states and 9003 transitions. [2021-08-06 15:28:35,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:28:35,752 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 26 [2021-08-06 15:28:35,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:35,757 INFO L225 Difference]: With dead ends: 2680 [2021-08-06 15:28:35,757 INFO L226 Difference]: Without dead ends: 2665 [2021-08-06 15:28:35,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 473.8ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:28:35,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-08-06 15:28:35,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2210. [2021-08-06 15:28:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2209 states have (on average 3.416025350837483) internal successors, (7546), 2209 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:35,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 7546 transitions. [2021-08-06 15:28:35,786 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 7546 transitions. Word has length 26 [2021-08-06 15:28:35,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:35,786 INFO L470 AbstractCegarLoop]: Abstraction has 2210 states and 7546 transitions. [2021-08-06 15:28:35,786 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) [2021-08-06 15:28:35,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 7546 transitions. [2021-08-06 15:28:35,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:35,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:35,789 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] [2021-08-06 15:28:35,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:36,012 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 [2021-08-06 15:28:36,013 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:36,013 INFO L82 PathProgramCache]: Analyzing trace with hash -700408688, now seen corresponding path program 39 times [2021-08-06 15:28:36,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:36,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968851217] [2021-08-06 15:28:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:36,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:36,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:36,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968851217] [2021-08-06 15:28:36,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968851217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:36,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627841543] [2021-08-06 15:28:36,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:28:36,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:36,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:36,448 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) [2021-08-06 15:28:36,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 15:28:41,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:28:41,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:41,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:28:41,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:42,060 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:28:42,060 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 110 treesize of output 79 [2021-08-06 15:28:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:42,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627841543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:42,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:42,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:28:42,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138364964] [2021-08-06 15:28:42,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:28:42,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:42,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:28:42,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:28:42,231 INFO L87 Difference]: Start difference. First operand 2210 states and 7546 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:28:43,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:43,307 INFO L93 Difference]: Finished difference Result 2880 states and 9550 transitions. [2021-08-06 15:28:43,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:28:43,307 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:28:43,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:43,312 INFO L225 Difference]: With dead ends: 2880 [2021-08-06 15:28:43,312 INFO L226 Difference]: Without dead ends: 2850 [2021-08-06 15:28:43,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 987.8ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:28:43,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2021-08-06 15:28:43,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2218. [2021-08-06 15:28:43,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 3.414524131709517) internal successors, (7570), 2217 states have internal predecessors, (7570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:43,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 7570 transitions. [2021-08-06 15:28:43,342 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 7570 transitions. Word has length 26 [2021-08-06 15:28:43,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:43,342 INFO L470 AbstractCegarLoop]: Abstraction has 2218 states and 7570 transitions. [2021-08-06 15:28:43,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:28:43,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 7570 transitions. [2021-08-06 15:28:43,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:43,345 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:43,345 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] [2021-08-06 15:28:43,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:43,559 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 [2021-08-06 15:28:43,559 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:43,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:43,559 INFO L82 PathProgramCache]: Analyzing trace with hash 849972876, now seen corresponding path program 56 times [2021-08-06 15:28:43,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:43,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813592354] [2021-08-06 15:28:43,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:43,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:43,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:43,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813592354] [2021-08-06 15:28:43,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813592354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:43,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605478057] [2021-08-06 15:28:43,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:28:43,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:43,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:43,785 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) [2021-08-06 15:28:43,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 15:28:47,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:28:47,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:47,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:28:47,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:48,668 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:28:48,668 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 116 treesize of output 82 [2021-08-06 15:28:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:48,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605478057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:48,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:48,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 15:28:48,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256915220] [2021-08-06 15:28:48,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:28:48,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:48,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:28:48,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:28:48,777 INFO L87 Difference]: Start difference. First operand 2218 states and 7570 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:49,646 INFO L93 Difference]: Finished difference Result 3444 states and 11037 transitions. [2021-08-06 15:28:49,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:28:49,646 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:28:49,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:49,652 INFO L225 Difference]: With dead ends: 3444 [2021-08-06 15:28:49,652 INFO L226 Difference]: Without dead ends: 3401 [2021-08-06 15:28:49,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 756.8ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:28:49,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3401 states. [2021-08-06 15:28:49,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3401 to 2320. [2021-08-06 15:28:49,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 3.435532557136697) internal successors, (7967), 2319 states have internal predecessors, (7967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:49,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 7967 transitions. [2021-08-06 15:28:49,685 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 7967 transitions. Word has length 26 [2021-08-06 15:28:49,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:49,685 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 7967 transitions. [2021-08-06 15:28:49,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:49,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 7967 transitions. [2021-08-06 15:28:49,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:49,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:49,688 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] [2021-08-06 15:28:49,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:49,912 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 [2021-08-06 15:28:49,913 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:49,913 INFO L82 PathProgramCache]: Analyzing trace with hash 889461688, now seen corresponding path program 40 times [2021-08-06 15:28:49,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:49,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779015043] [2021-08-06 15:28:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:49,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:50,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:50,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779015043] [2021-08-06 15:28:50,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779015043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:50,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603757804] [2021-08-06 15:28:50,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:28:50,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:50,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:50,258 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) [2021-08-06 15:28:50,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 15:28:54,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:28:54,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:54,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:28:54,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:55,833 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:28:55,834 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 110 treesize of output 79 [2021-08-06 15:28:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:56,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603757804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:56,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:56,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:28:56,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110843140] [2021-08-06 15:28:56,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:28:56,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:56,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:28:56,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:28:56,038 INFO L87 Difference]: Start difference. First operand 2320 states and 7967 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:28:57,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:57,487 INFO L93 Difference]: Finished difference Result 3284 states and 10802 transitions. [2021-08-06 15:28:57,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:28:57,487 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:28:57,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:57,493 INFO L225 Difference]: With dead ends: 3284 [2021-08-06 15:28:57,493 INFO L226 Difference]: Without dead ends: 3239 [2021-08-06 15:28:57,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1116.9ms TimeCoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:28:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2021-08-06 15:28:57,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 2339. [2021-08-06 15:28:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 3.440119760479042) internal successors, (8043), 2338 states have internal predecessors, (8043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 8043 transitions. [2021-08-06 15:28:57,529 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 8043 transitions. Word has length 26 [2021-08-06 15:28:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:57,529 INFO L470 AbstractCegarLoop]: Abstraction has 2339 states and 8043 transitions. [2021-08-06 15:28:57,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:28:57,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 8043 transitions. [2021-08-06 15:28:57,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:57,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:57,533 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] [2021-08-06 15:28:57,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:57,748 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 [2021-08-06 15:28:57,749 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:57,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:57,749 INFO L82 PathProgramCache]: Analyzing trace with hash -728071092, now seen corresponding path program 41 times [2021-08-06 15:28:57,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:57,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752728241] [2021-08-06 15:28:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:57,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:58,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:58,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752728241] [2021-08-06 15:28:58,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752728241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:58,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077296965] [2021-08-06 15:28:58,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:28:58,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:58,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:58,135 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) [2021-08-06 15:28:58,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 15:29:03,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:29:03,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:03,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:29:03,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:03,834 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:29:03,834 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 112 treesize of output 86 [2021-08-06 15:29:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:04,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077296965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:04,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:04,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 15:29:04,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404731268] [2021-08-06 15:29:04,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:29:04,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:04,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:29:04,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:29:04,258 INFO L87 Difference]: Start difference. First operand 2339 states and 8043 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:05,843 INFO L93 Difference]: Finished difference Result 3484 states and 11510 transitions. [2021-08-06 15:29:05,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:29:05,843 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:29:05,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:05,849 INFO L225 Difference]: With dead ends: 3484 [2021-08-06 15:29:05,849 INFO L226 Difference]: Without dead ends: 3454 [2021-08-06 15:29:05,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1283.4ms TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:29:05,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2021-08-06 15:29:05,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 2323. [2021-08-06 15:29:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2322 states have (on average 3.437984496124031) internal successors, (7983), 2322 states have internal predecessors, (7983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:05,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 7983 transitions. [2021-08-06 15:29:05,906 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 7983 transitions. Word has length 26 [2021-08-06 15:29:05,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:05,906 INFO L470 AbstractCegarLoop]: Abstraction has 2323 states and 7983 transitions. [2021-08-06 15:29:05,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:05,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 7983 transitions. [2021-08-06 15:29:05,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:05,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:05,909 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] [2021-08-06 15:29:05,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:06,123 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 [2021-08-06 15:29:06,124 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:06,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:06,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1075966400, now seen corresponding path program 57 times [2021-08-06 15:29:06,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:06,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076033508] [2021-08-06 15:29:06,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:06,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:06,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:06,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076033508] [2021-08-06 15:29:06,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076033508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:06,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771269900] [2021-08-06 15:29:06,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:29:06,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:06,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:06,372 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) [2021-08-06 15:29:06,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 15:29:11,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:29:11,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:11,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:29:11,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:12,269 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:29:12,269 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 116 treesize of output 82 [2021-08-06 15:29:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:12,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771269900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:12,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:12,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 15:29:12,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592189881] [2021-08-06 15:29:12,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:29:12,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:12,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:29:12,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:29:12,412 INFO L87 Difference]: Start difference. First operand 2323 states and 7983 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:29:13,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:13,415 INFO L93 Difference]: Finished difference Result 3890 states and 12691 transitions. [2021-08-06 15:29:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:29:13,416 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-08-06 15:29:13,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:13,423 INFO L225 Difference]: With dead ends: 3890 [2021-08-06 15:29:13,423 INFO L226 Difference]: Without dead ends: 3860 [2021-08-06 15:29:13,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 949.5ms TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:29:13,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2021-08-06 15:29:13,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 2420. [2021-08-06 15:29:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2419 states have (on average 3.437784208350558) internal successors, (8316), 2419 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 8316 transitions. [2021-08-06 15:29:13,520 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 8316 transitions. Word has length 26 [2021-08-06 15:29:13,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:13,520 INFO L470 AbstractCegarLoop]: Abstraction has 2420 states and 8316 transitions. [2021-08-06 15:29:13,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:29:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 8316 transitions. [2021-08-06 15:29:13,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:13,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:13,523 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] [2021-08-06 15:29:13,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:13,748 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 [2021-08-06 15:29:13,748 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:13,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:13,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1385352244, now seen corresponding path program 58 times [2021-08-06 15:29:13,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:13,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655646434] [2021-08-06 15:29:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:13,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:13,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:13,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655646434] [2021-08-06 15:29:13,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655646434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:13,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312355440] [2021-08-06 15:29:13,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:29:13,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:13,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:13,912 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) [2021-08-06 15:29:13,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 15:29:19,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:29:19,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:19,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:29:19,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:19,721 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 15:29:19,721 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 116 treesize of output 100 [2021-08-06 15:29:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:21,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312355440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:21,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:21,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 15:29:21,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686366248] [2021-08-06 15:29:21,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:29:21,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:21,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:29:21,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:29:21,021 INFO L87 Difference]: Start difference. First operand 2420 states and 8316 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:29:22,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:22,605 INFO L93 Difference]: Finished difference Result 4364 states and 14135 transitions. [2021-08-06 15:29:22,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:29:22,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-08-06 15:29:22,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:22,614 INFO L225 Difference]: With dead ends: 4364 [2021-08-06 15:29:22,614 INFO L226 Difference]: Without dead ends: 4320 [2021-08-06 15:29:22,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1305.8ms TimeCoverageRelationStatistics Valid=415, Invalid=1655, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:29:22,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2021-08-06 15:29:22,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 2442. [2021-08-06 15:29:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2442 states, 2441 states have (on average 3.4453092994674313) internal successors, (8410), 2441 states have internal predecessors, (8410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 8410 transitions. [2021-08-06 15:29:22,661 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 8410 transitions. Word has length 26 [2021-08-06 15:29:22,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:22,661 INFO L470 AbstractCegarLoop]: Abstraction has 2442 states and 8410 transitions. [2021-08-06 15:29:22,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:29:22,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 8410 transitions. [2021-08-06 15:29:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:22,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:22,664 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] [2021-08-06 15:29:22,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:22,884 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 [2021-08-06 15:29:22,885 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:22,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:22,885 INFO L82 PathProgramCache]: Analyzing trace with hash 465150452, now seen corresponding path program 42 times [2021-08-06 15:29:22,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:22,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004028179] [2021-08-06 15:29:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:22,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:23,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:23,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004028179] [2021-08-06 15:29:23,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004028179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:23,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968107554] [2021-08-06 15:29:23,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:29:23,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:23,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:23,281 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) [2021-08-06 15:29:23,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 15:29:28,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:29:28,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:28,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:29:28,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:29,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:29:29,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:29:29,252 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 104 treesize of output 78 [2021-08-06 15:29:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:29,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968107554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:29,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:29,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:29:29,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667730364] [2021-08-06 15:29:29,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:29:29,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:29,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:29:29,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:29:29,631 INFO L87 Difference]: Start difference. First operand 2442 states and 8410 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:31,383 INFO L93 Difference]: Finished difference Result 3211 states and 10821 transitions. [2021-08-06 15:29:31,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:29:31,383 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:29:31,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:31,389 INFO L225 Difference]: With dead ends: 3211 [2021-08-06 15:29:31,389 INFO L226 Difference]: Without dead ends: 3181 [2021-08-06 15:29:31,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1490.4ms TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:29:31,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-08-06 15:29:31,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2452. [2021-08-06 15:29:31,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.4426764585883314) internal successors, (8438), 2451 states have internal predecessors, (8438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 8438 transitions. [2021-08-06 15:29:31,425 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 8438 transitions. Word has length 26 [2021-08-06 15:29:31,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:31,425 INFO L470 AbstractCegarLoop]: Abstraction has 2452 states and 8438 transitions. [2021-08-06 15:29:31,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 8438 transitions. [2021-08-06 15:29:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:31,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:31,429 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] [2021-08-06 15:29:31,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:31,643 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 [2021-08-06 15:29:31,643 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:31,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:31,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1452642064, now seen corresponding path program 43 times [2021-08-06 15:29:31,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:31,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325741467] [2021-08-06 15:29:31,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:31,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:32,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:32,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325741467] [2021-08-06 15:29:32,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325741467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:32,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61757685] [2021-08-06 15:29:32,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:29:32,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:32,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:32,006 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) [2021-08-06 15:29:32,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 15:29:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:37,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:29:37,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:37,891 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:29:37,892 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 120 treesize of output 102 [2021-08-06 15:29:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:38,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61757685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:38,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:38,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:29:38,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908131074] [2021-08-06 15:29:38,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:29:38,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:38,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:29:38,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:29:38,739 INFO L87 Difference]: Start difference. First operand 2452 states and 8438 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:29:39,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:39,859 INFO L93 Difference]: Finished difference Result 3335 states and 11187 transitions. [2021-08-06 15:29:39,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:29:39,859 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:29:39,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:39,866 INFO L225 Difference]: With dead ends: 3335 [2021-08-06 15:29:39,866 INFO L226 Difference]: Without dead ends: 3310 [2021-08-06 15:29:39,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1052.4ms TimeCoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:29:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-08-06 15:29:39,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2458. [2021-08-06 15:29:39,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2458 states, 2457 states have (on average 3.444037444037444) internal successors, (8462), 2457 states have internal predecessors, (8462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 8462 transitions. [2021-08-06 15:29:39,907 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 8462 transitions. Word has length 26 [2021-08-06 15:29:39,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:39,907 INFO L470 AbstractCegarLoop]: Abstraction has 2458 states and 8462 transitions. [2021-08-06 15:29:39,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:29:39,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 8462 transitions. [2021-08-06 15:29:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:39,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:39,911 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] [2021-08-06 15:29:39,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:40,124 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 [2021-08-06 15:29:40,124 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:40,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:40,125 INFO L82 PathProgramCache]: Analyzing trace with hash 55443366, now seen corresponding path program 59 times [2021-08-06 15:29:40,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:40,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829338053] [2021-08-06 15:29:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:40,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:40,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:40,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829338053] [2021-08-06 15:29:40,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829338053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:40,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633983009] [2021-08-06 15:29:40,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:29:40,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:40,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:40,365 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) [2021-08-06 15:29:40,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 15:29:45,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:29:45,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:45,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:29:45,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:46,637 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:29:46,638 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 116 treesize of output 82 [2021-08-06 15:29:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:46,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633983009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:46,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:46,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:29:46,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925308148] [2021-08-06 15:29:46,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:29:46,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:46,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:29:46,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:29:46,758 INFO L87 Difference]: Start difference. First operand 2458 states and 8462 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-06 15:29:48,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:48,431 INFO L93 Difference]: Finished difference Result 3518 states and 11698 transitions. [2021-08-06 15:29:48,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:29:48,431 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:29:48,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:48,438 INFO L225 Difference]: With dead ends: 3518 [2021-08-06 15:29:48,438 INFO L226 Difference]: Without dead ends: 3481 [2021-08-06 15:29:48,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1429.6ms TimeCoverageRelationStatistics Valid=514, Invalid=2036, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:29:48,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3481 states. [2021-08-06 15:29:48,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3481 to 2512. [2021-08-06 15:29:48,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2512 states, 2511 states have (on average 3.440461967343688) internal successors, (8639), 2511 states have internal predecessors, (8639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 8639 transitions. [2021-08-06 15:29:48,484 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 8639 transitions. Word has length 26 [2021-08-06 15:29:48,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:48,484 INFO L470 AbstractCegarLoop]: Abstraction has 2512 states and 8639 transitions. [2021-08-06 15:29:48,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-06 15:29:48,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 8639 transitions. [2021-08-06 15:29:48,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:48,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:48,488 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] [2021-08-06 15:29:48,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:48,700 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 [2021-08-06 15:29:48,701 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:48,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:48,701 INFO L82 PathProgramCache]: Analyzing trace with hash 980937232, now seen corresponding path program 60 times [2021-08-06 15:29:48,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:48,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435008299] [2021-08-06 15:29:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:48,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:48,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:48,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435008299] [2021-08-06 15:29:48,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435008299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:48,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100757103] [2021-08-06 15:29:48,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:29:48,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:48,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:48,971 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) [2021-08-06 15:29:48,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 15:29:54,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:29:54,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:54,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:29:54,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:55,243 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:29:55,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 82 [2021-08-06 15:29:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:55,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100757103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:55,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:55,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:29:55,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360919843] [2021-08-06 15:29:55,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:29:55,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:55,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:29:55,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:29:55,397 INFO L87 Difference]: Start difference. First operand 2512 states and 8639 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-06 15:29:56,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:56,993 INFO L93 Difference]: Finished difference Result 3557 states and 11846 transitions. [2021-08-06 15:29:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 15:29:56,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:29:56,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:57,000 INFO L225 Difference]: With dead ends: 3557 [2021-08-06 15:29:57,000 INFO L226 Difference]: Without dead ends: 3523 [2021-08-06 15:29:57,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1365.5ms TimeCoverageRelationStatistics Valid=528, Invalid=1922, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 15:29:57,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3523 states. [2021-08-06 15:29:57,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3523 to 2492. [2021-08-06 15:29:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2492 states, 2491 states have (on average 3.44199116820554) internal successors, (8574), 2491 states have internal predecessors, (8574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:57,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 8574 transitions. [2021-08-06 15:29:57,063 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 8574 transitions. Word has length 26 [2021-08-06 15:29:57,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:57,064 INFO L470 AbstractCegarLoop]: Abstraction has 2492 states and 8574 transitions. [2021-08-06 15:29:57,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-08-06 15:29:57,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 8574 transitions. [2021-08-06 15:29:57,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:57,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:57,068 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] [2021-08-06 15:29:57,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:57,280 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 [2021-08-06 15:29:57,281 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:57,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:57,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1636681344, now seen corresponding path program 61 times [2021-08-06 15:29:57,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:57,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187409080] [2021-08-06 15:29:57,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:57,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:57,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:57,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187409080] [2021-08-06 15:29:57,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187409080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:57,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304748175] [2021-08-06 15:29:57,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:29:57,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:57,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:57,474 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) [2021-08-06 15:29:57,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 15:30:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:03,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:30:03,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:03,490 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 15:30:03,491 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 116 treesize of output 100 [2021-08-06 15:30:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:05,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304748175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:05,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:05,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 15:30:05,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115746546] [2021-08-06 15:30:05,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:30:05,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:05,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:30:05,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:30:05,155 INFO L87 Difference]: Start difference. First operand 2492 states and 8574 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:30:06,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:06,678 INFO L93 Difference]: Finished difference Result 3906 states and 12876 transitions. [2021-08-06 15:30:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:30:06,678 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-08-06 15:30:06,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:06,687 INFO L225 Difference]: With dead ends: 3906 [2021-08-06 15:30:06,687 INFO L226 Difference]: Without dead ends: 3862 [2021-08-06 15:30:06,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1300.0ms TimeCoverageRelationStatistics Valid=435, Invalid=1727, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:30:06,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-08-06 15:30:06,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 2569. [2021-08-06 15:30:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2569 states, 2568 states have (on average 3.4345794392523366) internal successors, (8820), 2568 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2569 states to 2569 states and 8820 transitions. [2021-08-06 15:30:06,739 INFO L78 Accepts]: Start accepts. Automaton has 2569 states and 8820 transitions. Word has length 26 [2021-08-06 15:30:06,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:06,739 INFO L470 AbstractCegarLoop]: Abstraction has 2569 states and 8820 transitions. [2021-08-06 15:30:06,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:30:06,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2569 states and 8820 transitions. [2021-08-06 15:30:06,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:30:06,743 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:06,743 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] [2021-08-06 15:30:06,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:06,960 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 [2021-08-06 15:30:06,960 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:06,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:06,960 INFO L82 PathProgramCache]: Analyzing trace with hash 186452920, now seen corresponding path program 44 times [2021-08-06 15:30:06,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:06,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614034636] [2021-08-06 15:30:06,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:06,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:07,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:07,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614034636] [2021-08-06 15:30:07,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614034636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:07,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239385185] [2021-08-06 15:30:07,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:30:07,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:07,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:07,359 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) [2021-08-06 15:30:07,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 15:30:12,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:30:12,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:12,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:30:12,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:13,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:30:13,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:30:13,736 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 104 treesize of output 78 [2021-08-06 15:30:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:14,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239385185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:14,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:14,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:30:14,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744124098] [2021-08-06 15:30:14,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:30:14,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:14,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:30:14,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:30:14,185 INFO L87 Difference]: Start difference. First operand 2569 states and 8820 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:15,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:15,669 INFO L93 Difference]: Finished difference Result 3386 states and 11363 transitions. [2021-08-06 15:30:15,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:30:15,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:30:15,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:15,676 INFO L225 Difference]: With dead ends: 3386 [2021-08-06 15:30:15,676 INFO L226 Difference]: Without dead ends: 3356 [2021-08-06 15:30:15,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1285.9ms TimeCoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:30:15,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2021-08-06 15:30:15,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2567. [2021-08-06 15:30:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2567 states, 2566 states have (on average 3.430631332813718) internal successors, (8803), 2566 states have internal predecessors, (8803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2567 states to 2567 states and 8803 transitions. [2021-08-06 15:30:15,715 INFO L78 Accepts]: Start accepts. Automaton has 2567 states and 8803 transitions. Word has length 26 [2021-08-06 15:30:15,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:15,715 INFO L470 AbstractCegarLoop]: Abstraction has 2567 states and 8803 transitions. [2021-08-06 15:30:15,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:15,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2567 states and 8803 transitions. [2021-08-06 15:30:15,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:30:15,719 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:15,719 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] [2021-08-06 15:30:15,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:15,932 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 [2021-08-06 15:30:15,932 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:15,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:15,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1173944532, now seen corresponding path program 45 times [2021-08-06 15:30:15,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:15,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656316915] [2021-08-06 15:30:15,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:15,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:16,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:16,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656316915] [2021-08-06 15:30:16,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656316915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:16,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057383174] [2021-08-06 15:30:16,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:30:16,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:16,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:16,381 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) [2021-08-06 15:30:16,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 15:30:22,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:30:22,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:22,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:30:22,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:22,699 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:30:22,700 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 112 treesize of output 86 [2021-08-06 15:30:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:23,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057383174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:23,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:23,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:30:23,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783385519] [2021-08-06 15:30:23,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:30:23,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:23,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:30:23,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:30:23,188 INFO L87 Difference]: Start difference. First operand 2567 states and 8803 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:30:23,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:23,948 INFO L93 Difference]: Finished difference Result 3352 states and 11276 transitions. [2021-08-06 15:30:23,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:30:23,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:30:23,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:23,955 INFO L225 Difference]: With dead ends: 3352 [2021-08-06 15:30:23,955 INFO L226 Difference]: Without dead ends: 3327 [2021-08-06 15:30:23,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 650.0ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:30:23,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2021-08-06 15:30:24,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 2552. [2021-08-06 15:30:24,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 3.4300274402195217) internal successors, (8750), 2551 states have internal predecessors, (8750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 8750 transitions. [2021-08-06 15:30:24,011 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 8750 transitions. Word has length 26 [2021-08-06 15:30:24,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:24,011 INFO L470 AbstractCegarLoop]: Abstraction has 2552 states and 8750 transitions. [2021-08-06 15:30:24,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:30:24,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 8750 transitions. [2021-08-06 15:30:24,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:30:24,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:24,014 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] [2021-08-06 15:30:24,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:24,240 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 [2021-08-06 15:30:24,241 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:24,242 INFO L82 PathProgramCache]: Analyzing trace with hash -636482032, now seen corresponding path program 46 times [2021-08-06 15:30:24,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:24,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67726385] [2021-08-06 15:30:24,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:24,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:24,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:24,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67726385] [2021-08-06 15:30:24,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67726385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:24,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30849064] [2021-08-06 15:30:24,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:30:24,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:24,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:24,583 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) [2021-08-06 15:30:24,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 15:30:30,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:30:30,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:30,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:30:30,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:31,098 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:30:31,098 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 112 treesize of output 86 [2021-08-06 15:30:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:31,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30849064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:31,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:31,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:30:31,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981793626] [2021-08-06 15:30:31,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:30:31,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:31,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:30:31,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:30:31,553 INFO L87 Difference]: Start difference. First operand 2552 states and 8750 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:30:32,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:32,118 INFO L93 Difference]: Finished difference Result 3281 states and 11076 transitions. [2021-08-06 15:30:32,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:30:32,118 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:30:32,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:32,124 INFO L225 Difference]: With dead ends: 3281 [2021-08-06 15:30:32,124 INFO L226 Difference]: Without dead ends: 3266 [2021-08-06 15:30:32,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 484.1ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:30:32,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3266 states. [2021-08-06 15:30:32,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3266 to 2546. [2021-08-06 15:30:32,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 3.4286836935166995) internal successors, (8726), 2545 states have internal predecessors, (8726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 8726 transitions. [2021-08-06 15:30:32,163 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 8726 transitions. Word has length 26 [2021-08-06 15:30:32,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:32,163 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 8726 transitions. [2021-08-06 15:30:32,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2021-08-06 15:30:32,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 8726 transitions. [2021-08-06 15:30:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:30:32,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:32,166 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] [2021-08-06 15:30:32,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 15:30:32,386 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 [2021-08-06 15:30:32,386 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:32,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:32,386 INFO L82 PathProgramCache]: Analyzing trace with hash 248541124, now seen corresponding path program 62 times [2021-08-06 15:30:32,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:32,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822790452] [2021-08-06 15:30:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:32,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:32,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:32,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822790452] [2021-08-06 15:30:32,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822790452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:32,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563316103] [2021-08-06 15:30:32,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:30:32,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:32,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:32,674 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) [2021-08-06 15:30:32,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 15:30:38,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:30:38,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:38,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:30:38,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:39,257 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:30:39,257 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 116 treesize of output 82 [2021-08-06 15:30:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:39,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563316103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:39,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:39,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 15:30:39,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422877224] [2021-08-06 15:30:39,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:30:39,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:39,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:30:39,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:30:39,425 INFO L87 Difference]: Start difference. First operand 2546 states and 8726 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:30:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:40,784 INFO L93 Difference]: Finished difference Result 3673 states and 12249 transitions. [2021-08-06 15:30:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:30:40,784 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-08-06 15:30:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:40,791 INFO L225 Difference]: With dead ends: 3673 [2021-08-06 15:30:40,791 INFO L226 Difference]: Without dead ends: 3629 [2021-08-06 15:30:40,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1127.4ms TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:30:40,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2021-08-06 15:30:40,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 2538. [2021-08-06 15:30:40,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2538 states, 2537 states have (on average 3.425305478912101) internal successors, (8690), 2537 states have internal predecessors, (8690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:40,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2538 states to 2538 states and 8690 transitions. [2021-08-06 15:30:40,833 INFO L78 Accepts]: Start accepts. Automaton has 2538 states and 8690 transitions. Word has length 26 [2021-08-06 15:30:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:40,833 INFO L470 AbstractCegarLoop]: Abstraction has 2538 states and 8690 transitions. [2021-08-06 15:30:40,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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) [2021-08-06 15:30:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2538 states and 8690 transitions. [2021-08-06 15:30:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:30:40,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:40,837 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] [2021-08-06 15:30:40,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 15:30:41,060 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 [2021-08-06 15:30:41,061 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash -969474032, now seen corresponding path program 63 times [2021-08-06 15:30:41,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:41,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85096307] [2021-08-06 15:30:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:41,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:41,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:41,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85096307] [2021-08-06 15:30:41,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85096307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:41,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909972968] [2021-08-06 15:30:41,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:30:41,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:41,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:41,406 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) [2021-08-06 15:30:41,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 15:30:46,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:30:46,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:46,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:30:46,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:47,775 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 15:30:47,775 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 120 treesize of output 100 [2021-08-06 15:30:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:48,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909972968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:48,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:48,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:30:48,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148048443] [2021-08-06 15:30:48,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:30:48,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:48,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:30:48,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:30:48,717 INFO L87 Difference]: Start difference. First operand 2538 states and 8690 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:49,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:49,826 INFO L93 Difference]: Finished difference Result 3322 states and 11183 transitions. [2021-08-06 15:30:49,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:30:49,827 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:30:49,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:49,832 INFO L225 Difference]: With dead ends: 3322 [2021-08-06 15:30:49,832 INFO L226 Difference]: Without dead ends: 3307 [2021-08-06 15:30:49,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 957.6ms TimeCoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:30:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2021-08-06 15:30:49,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 2543. [2021-08-06 15:30:49,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2543 states, 2542 states have (on average 3.4287962234461054) internal successors, (8716), 2542 states have internal predecessors, (8716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:49,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 8716 transitions. [2021-08-06 15:30:49,903 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 8716 transitions. Word has length 26 [2021-08-06 15:30:49,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:49,903 INFO L470 AbstractCegarLoop]: Abstraction has 2543 states and 8716 transitions. [2021-08-06 15:30:49,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 8716 transitions. [2021-08-06 15:30:49,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:30:49,907 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:49,907 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] [2021-08-06 15:30:49,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-06 15:30:50,120 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 [2021-08-06 15:30:50,121 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:50,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:50,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1695376662, now seen corresponding path program 47 times [2021-08-06 15:30:50,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:50,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515721520] [2021-08-06 15:30:50,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:50,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:50,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:50,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515721520] [2021-08-06 15:30:50,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515721520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:50,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060669901] [2021-08-06 15:30:50,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:30:50,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:50,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:50,203 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) [2021-08-06 15:30:50,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 15:30:56,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:30:56,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:56,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:30:56,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:56,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060669901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:56,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:56,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 15:30:56,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828285004] [2021-08-06 15:30:56,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:30:56,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:56,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:30:56,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:30:56,492 INFO L87 Difference]: Start difference. First operand 2543 states and 8716 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) [2021-08-06 15:30:57,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:57,406 INFO L93 Difference]: Finished difference Result 5638 states and 17681 transitions. [2021-08-06 15:30:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 15:30:57,407 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 [2021-08-06 15:30:57,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:57,417 INFO L225 Difference]: With dead ends: 5638 [2021-08-06 15:30:57,417 INFO L226 Difference]: Without dead ends: 5638 [2021-08-06 15:30:57,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 531.1ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 15:30:57,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-08-06 15:30:57,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 2740. [2021-08-06 15:30:57,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2740 states, 2739 states have (on average 3.470974808324206) internal successors, (9507), 2739 states have internal predecessors, (9507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2740 states to 2740 states and 9507 transitions. [2021-08-06 15:30:57,478 INFO L78 Accepts]: Start accepts. Automaton has 2740 states and 9507 transitions. Word has length 28 [2021-08-06 15:30:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:57,478 INFO L470 AbstractCegarLoop]: Abstraction has 2740 states and 9507 transitions. [2021-08-06 15:30:57,478 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) [2021-08-06 15:30:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2740 states and 9507 transitions. [2021-08-06 15:30:57,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:30:57,482 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:57,482 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] [2021-08-06 15:30:57,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-06 15:30:57,707 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 [2021-08-06 15:30:57,707 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:57,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:57,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1623271790, now seen corresponding path program 48 times [2021-08-06 15:30:57,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:57,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539477169] [2021-08-06 15:30:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:57,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:57,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:57,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539477169] [2021-08-06 15:30:57,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539477169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:57,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335036184] [2021-08-06 15:30:57,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:30:57,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:57,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:57,778 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) [2021-08-06 15:30:57,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 15:31:03,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:31:03,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:03,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:31:03,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:03,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335036184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:03,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:03,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 15:31:03,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786473169] [2021-08-06 15:31:03,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:31:03,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:03,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:31:03,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:31:03,954 INFO L87 Difference]: Start difference. First operand 2740 states and 9507 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:05,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:05,157 INFO L93 Difference]: Finished difference Result 7320 states and 22585 transitions. [2021-08-06 15:31:05,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-06 15:31:05,157 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:31:05,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:05,175 INFO L225 Difference]: With dead ends: 7320 [2021-08-06 15:31:05,175 INFO L226 Difference]: Without dead ends: 7320 [2021-08-06 15:31:05,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 727.7ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-08-06 15:31:05,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7320 states. [2021-08-06 15:31:05,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7320 to 2754. [2021-08-06 15:31:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2754 states, 2753 states have (on average 3.4780239738467125) internal successors, (9575), 2753 states have internal predecessors, (9575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:05,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 9575 transitions. [2021-08-06 15:31:05,268 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 9575 transitions. Word has length 28 [2021-08-06 15:31:05,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:05,268 INFO L470 AbstractCegarLoop]: Abstraction has 2754 states and 9575 transitions. [2021-08-06 15:31:05,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:05,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 9575 transitions. [2021-08-06 15:31:05,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:31:05,273 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:05,273 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] [2021-08-06 15:31:05,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:05,496 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 [2021-08-06 15:31:05,497 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:05,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:05,497 INFO L82 PathProgramCache]: Analyzing trace with hash -2104743426, now seen corresponding path program 49 times [2021-08-06 15:31:05,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:05,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202966992] [2021-08-06 15:31:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:05,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:05,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:05,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202966992] [2021-08-06 15:31:05,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202966992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:05,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163354212] [2021-08-06 15:31:05,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:31:05,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:05,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:05,559 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) [2021-08-06 15:31:05,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 15:31:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:11,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:31:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:11,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163354212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:11,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:11,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 15:31:11,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623765737] [2021-08-06 15:31:11,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:31:11,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:11,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:31:11,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:31:11,769 INFO L87 Difference]: Start difference. First operand 2754 states and 9575 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:12,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:12,983 INFO L93 Difference]: Finished difference Result 6717 states and 21126 transitions. [2021-08-06 15:31:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-06 15:31:12,984 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:31:12,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:12,997 INFO L225 Difference]: With dead ends: 6717 [2021-08-06 15:31:12,998 INFO L226 Difference]: Without dead ends: 6717 [2021-08-06 15:31:12,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 701.7ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 15:31:13,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6717 states. [2021-08-06 15:31:13,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6717 to 2699. [2021-08-06 15:31:13,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 3.4577464788732395) internal successors, (9329), 2698 states have internal predecessors, (9329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:13,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 9329 transitions. [2021-08-06 15:31:13,090 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 9329 transitions. Word has length 28 [2021-08-06 15:31:13,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:13,090 INFO L470 AbstractCegarLoop]: Abstraction has 2699 states and 9329 transitions. [2021-08-06 15:31:13,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:13,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 9329 transitions. [2021-08-06 15:31:13,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:31:13,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:13,095 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] [2021-08-06 15:31:13,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-06 15:31:13,314 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 [2021-08-06 15:31:13,314 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:13,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:13,314 INFO L82 PathProgramCache]: Analyzing trace with hash -922715104, now seen corresponding path program 50 times [2021-08-06 15:31:13,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:13,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552630651] [2021-08-06 15:31:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:13,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:13,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:13,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552630651] [2021-08-06 15:31:13,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552630651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:13,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483181546] [2021-08-06 15:31:13,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:31:13,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:13,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:13,395 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) [2021-08-06 15:31:13,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 15:31:19,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:31:19,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:19,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:31:19,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:19,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483181546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:19,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:19,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 15:31:19,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260897188] [2021-08-06 15:31:19,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:31:19,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:19,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:31:19,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:31:19,662 INFO L87 Difference]: Start difference. First operand 2699 states and 9329 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) [2021-08-06 15:31:20,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:20,480 INFO L93 Difference]: Finished difference Result 5723 states and 17846 transitions. [2021-08-06 15:31:20,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-06 15:31:20,480 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 [2021-08-06 15:31:20,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:20,490 INFO L225 Difference]: With dead ends: 5723 [2021-08-06 15:31:20,490 INFO L226 Difference]: Without dead ends: 5723 [2021-08-06 15:31:20,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 486.8ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 15:31:20,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5723 states. [2021-08-06 15:31:20,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5723 to 2717. [2021-08-06 15:31:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2717 states, 2716 states have (on average 3.452135493372607) internal successors, (9376), 2716 states have internal predecessors, (9376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2717 states to 2717 states and 9376 transitions. [2021-08-06 15:31:20,580 INFO L78 Accepts]: Start accepts. Automaton has 2717 states and 9376 transitions. Word has length 28 [2021-08-06 15:31:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:20,580 INFO L470 AbstractCegarLoop]: Abstraction has 2717 states and 9376 transitions. [2021-08-06 15:31:20,580 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) [2021-08-06 15:31:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2717 states and 9376 transitions. [2021-08-06 15:31:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:31:20,584 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:20,584 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] [2021-08-06 15:31:20,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:20,796 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 [2021-08-06 15:31:20,797 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:20,797 INFO L82 PathProgramCache]: Analyzing trace with hash -2132345370, now seen corresponding path program 64 times [2021-08-06 15:31:20,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:20,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123165177] [2021-08-06 15:31:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:20,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:20,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:20,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123165177] [2021-08-06 15:31:20,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123165177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:20,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58727984] [2021-08-06 15:31:20,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:31:20,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:20,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:20,965 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) [2021-08-06 15:31:20,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 15:31:26,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:31:26,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:26,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:31:26,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:26,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58727984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:26,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:26,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 15:31:26,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962465114] [2021-08-06 15:31:26,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:31:26,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:26,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:31:26,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:31:26,937 INFO L87 Difference]: Start difference. First operand 2717 states and 9376 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) [2021-08-06 15:31:27,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:27,461 INFO L93 Difference]: Finished difference Result 5116 states and 16166 transitions. [2021-08-06 15:31:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:31:27,461 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 [2021-08-06 15:31:27,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:27,470 INFO L225 Difference]: With dead ends: 5116 [2021-08-06 15:31:27,471 INFO L226 Difference]: Without dead ends: 5116 [2021-08-06 15:31:27,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:31:27,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5116 states. [2021-08-06 15:31:27,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5116 to 2787. [2021-08-06 15:31:27,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 3.4382627422828427) internal successors, (9579), 2786 states have internal predecessors, (9579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:27,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 9579 transitions. [2021-08-06 15:31:27,530 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 9579 transitions. Word has length 28 [2021-08-06 15:31:27,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:27,530 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 9579 transitions. [2021-08-06 15:31:27,530 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) [2021-08-06 15:31:27,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 9579 transitions. [2021-08-06 15:31:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:31:27,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:27,535 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] [2021-08-06 15:31:27,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:27,760 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 [2021-08-06 15:31:27,761 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:27,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:27,761 INFO L82 PathProgramCache]: Analyzing trace with hash -7144722, now seen corresponding path program 51 times [2021-08-06 15:31:27,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:27,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150359379] [2021-08-06 15:31:27,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:27,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:31:27,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:27,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150359379] [2021-08-06 15:31:27,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150359379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:27,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849820761] [2021-08-06 15:31:27,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:31:27,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:27,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:27,909 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) [2021-08-06 15:31:27,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 15:31:33,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:31:33,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:33,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:31:33,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:34,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:31:34,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849820761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:34,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:34,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:31:34,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681803131] [2021-08-06 15:31:34,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:31:34,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:34,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:31:34,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:31:34,060 INFO L87 Difference]: Start difference. First operand 2787 states and 9579 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) [2021-08-06 15:31:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:34,249 INFO L93 Difference]: Finished difference Result 4369 states and 14311 transitions. [2021-08-06 15:31:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:31:34,250 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 [2021-08-06 15:31:34,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:34,256 INFO L225 Difference]: With dead ends: 4369 [2021-08-06 15:31:34,256 INFO L226 Difference]: Without dead ends: 4321 [2021-08-06 15:31:34,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:31:34,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4321 states. [2021-08-06 15:31:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4321 to 3111. [2021-08-06 15:31:34,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 3110 states have (on average 3.4893890675241157) internal successors, (10852), 3110 states have internal predecessors, (10852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:34,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 10852 transitions. [2021-08-06 15:31:34,319 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 10852 transitions. Word has length 28 [2021-08-06 15:31:34,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:34,319 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 10852 transitions. [2021-08-06 15:31:34,320 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) [2021-08-06 15:31:34,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 10852 transitions. [2021-08-06 15:31:34,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:31:34,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:34,325 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] [2021-08-06 15:31:34,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:34,552 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 [2021-08-06 15:31:34,553 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:34,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:34,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1584284586, now seen corresponding path program 52 times [2021-08-06 15:31:34,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:34,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766238998] [2021-08-06 15:31:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:34,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:34,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:34,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766238998] [2021-08-06 15:31:34,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766238998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:34,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694408249] [2021-08-06 15:31:34,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:31:34,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:34,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:34,698 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) [2021-08-06 15:31:34,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 15:31:40,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:31:40,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:40,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:31:40,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:40,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694408249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:40,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:40,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 15:31:40,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936966362] [2021-08-06 15:31:40,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:31:40,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:40,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:31:40,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:31:40,909 INFO L87 Difference]: Start difference. First operand 3111 states and 10852 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) [2021-08-06 15:31:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:41,500 INFO L93 Difference]: Finished difference Result 4956 states and 15960 transitions. [2021-08-06 15:31:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:31:41,512 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 [2021-08-06 15:31:41,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:41,522 INFO L225 Difference]: With dead ends: 4956 [2021-08-06 15:31:41,522 INFO L226 Difference]: Without dead ends: 4909 [2021-08-06 15:31:41,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 343.4ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:31:41,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4909 states. [2021-08-06 15:31:41,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4909 to 3282. [2021-08-06 15:31:41,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3282 states, 3281 states have (on average 3.5019811033221577) internal successors, (11490), 3281 states have internal predecessors, (11490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3282 states to 3282 states and 11490 transitions. [2021-08-06 15:31:41,628 INFO L78 Accepts]: Start accepts. Automaton has 3282 states and 11490 transitions. Word has length 28 [2021-08-06 15:31:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:41,628 INFO L470 AbstractCegarLoop]: Abstraction has 3282 states and 11490 transitions. [2021-08-06 15:31:41,628 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) [2021-08-06 15:31:41,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3282 states and 11490 transitions. [2021-08-06 15:31:41,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:31:41,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:41,633 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] [2021-08-06 15:31:41,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:41,860 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 [2021-08-06 15:31:41,861 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:41,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:41,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1174593234, now seen corresponding path program 53 times [2021-08-06 15:31:41,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:41,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121598557] [2021-08-06 15:31:41,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:41,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:41,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:41,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121598557] [2021-08-06 15:31:41,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121598557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:41,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894966837] [2021-08-06 15:31:41,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:31:41,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:41,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:41,929 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) [2021-08-06 15:31:41,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 15:31:47,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:31:47,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:47,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:31:47,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:48,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894966837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:48,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:48,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 15:31:48,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338875136] [2021-08-06 15:31:48,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:31:48,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:48,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:31:48,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:31:48,059 INFO L87 Difference]: Start difference. First operand 3282 states and 11490 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) [2021-08-06 15:31:48,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:48,748 INFO L93 Difference]: Finished difference Result 5273 states and 16664 transitions. [2021-08-06 15:31:48,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 15:31:48,748 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 [2021-08-06 15:31:48,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:48,757 INFO L225 Difference]: With dead ends: 5273 [2021-08-06 15:31:48,757 INFO L226 Difference]: Without dead ends: 5247 [2021-08-06 15:31:48,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:31:48,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5247 states. [2021-08-06 15:31:48,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5247 to 3306. [2021-08-06 15:31:48,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3306 states, 3305 states have (on average 3.507715582450832) internal successors, (11593), 3305 states have internal predecessors, (11593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:48,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 11593 transitions. [2021-08-06 15:31:48,815 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 11593 transitions. Word has length 28 [2021-08-06 15:31:48,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:48,815 INFO L470 AbstractCegarLoop]: Abstraction has 3306 states and 11593 transitions. [2021-08-06 15:31:48,815 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) [2021-08-06 15:31:48,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 11593 transitions. [2021-08-06 15:31:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:31:48,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:48,820 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] [2021-08-06 15:31:48,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-06 15:31:49,045 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 [2021-08-06 15:31:49,046 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash -502180452, now seen corresponding path program 54 times [2021-08-06 15:31:49,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:49,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839958131] [2021-08-06 15:31:49,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:49,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:49,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:49,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839958131] [2021-08-06 15:31:49,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839958131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:49,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630643870] [2021-08-06 15:31:49,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:31:49,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:49,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:49,184 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) [2021-08-06 15:31:49,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 15:31:55,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:31:55,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:55,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:31:55,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:55,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630643870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:55,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:55,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 15:31:55,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010756147] [2021-08-06 15:31:55,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:31:55,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:55,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:31:55,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:31:55,322 INFO L87 Difference]: Start difference. First operand 3306 states and 11593 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) [2021-08-06 15:31:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:56,094 INFO L93 Difference]: Finished difference Result 5277 states and 16702 transitions. [2021-08-06 15:31:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 15:31:56,095 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 [2021-08-06 15:31:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:56,104 INFO L225 Difference]: With dead ends: 5277 [2021-08-06 15:31:56,104 INFO L226 Difference]: Without dead ends: 5271 [2021-08-06 15:31:56,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 536.1ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:31:56,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5271 states. [2021-08-06 15:31:56,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5271 to 3309. [2021-08-06 15:31:56,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 3308 states have (on average 3.5024183796856105) internal successors, (11586), 3308 states have internal predecessors, (11586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:56,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 11586 transitions. [2021-08-06 15:31:56,167 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 11586 transitions. Word has length 28 [2021-08-06 15:31:56,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:56,167 INFO L470 AbstractCegarLoop]: Abstraction has 3309 states and 11586 transitions. [2021-08-06 15:31:56,167 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) [2021-08-06 15:31:56,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 11586 transitions. [2021-08-06 15:31:56,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:31:56,172 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:56,172 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] [2021-08-06 15:31:56,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-06 15:31:56,384 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 [2021-08-06 15:31:56,385 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:56,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:56,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1550979374, now seen corresponding path program 55 times [2021-08-06 15:31:56,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:56,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046339953] [2021-08-06 15:31:56,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:56,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:56,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:56,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046339953] [2021-08-06 15:31:56,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046339953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:56,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832307312] [2021-08-06 15:31:56,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:31:56,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:56,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:56,449 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) [2021-08-06 15:31:56,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 15:32:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:02,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:32:02,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:02,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832307312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:02,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:02,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:32:02,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290970858] [2021-08-06 15:32:02,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:32:02,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:02,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:32:02,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:32:02,693 INFO L87 Difference]: Start difference. First operand 3309 states and 11586 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) [2021-08-06 15:32:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:03,201 INFO L93 Difference]: Finished difference Result 6095 states and 19612 transitions. [2021-08-06 15:32:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 15:32:03,201 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 [2021-08-06 15:32:03,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:03,211 INFO L225 Difference]: With dead ends: 6095 [2021-08-06 15:32:03,212 INFO L226 Difference]: Without dead ends: 6012 [2021-08-06 15:32:03,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 288.0ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:32:03,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2021-08-06 15:32:03,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 3476. [2021-08-06 15:32:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3476 states, 3475 states have (on average 3.540431654676259) internal successors, (12303), 3475 states have internal predecessors, (12303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3476 states to 3476 states and 12303 transitions. [2021-08-06 15:32:03,283 INFO L78 Accepts]: Start accepts. Automaton has 3476 states and 12303 transitions. Word has length 28 [2021-08-06 15:32:03,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:03,283 INFO L470 AbstractCegarLoop]: Abstraction has 3476 states and 12303 transitions. [2021-08-06 15:32:03,283 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) [2021-08-06 15:32:03,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3476 states and 12303 transitions. [2021-08-06 15:32:03,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:03,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:03,288 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] [2021-08-06 15:32:03,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-06 15:32:03,517 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 [2021-08-06 15:32:03,517 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:03,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1495598638, now seen corresponding path program 56 times [2021-08-06 15:32:03,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:03,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515576430] [2021-08-06 15:32:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:03,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:03,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:32:03,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:03,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515576430] [2021-08-06 15:32:03,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515576430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:03,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096352935] [2021-08-06 15:32:03,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:32:03,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:03,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:03,571 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) [2021-08-06 15:32:03,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 15:32:09,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:32:09,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:09,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:32:09,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:32:09,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096352935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:09,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:09,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 15:32:09,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312682242] [2021-08-06 15:32:09,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:32:09,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:09,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:32:09,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:32:09,796 INFO L87 Difference]: Start difference. First operand 3476 states and 12303 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) [2021-08-06 15:32:09,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:09,969 INFO L93 Difference]: Finished difference Result 4830 states and 15962 transitions. [2021-08-06 15:32:09,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:32:09,970 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 [2021-08-06 15:32:09,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:09,978 INFO L225 Difference]: With dead ends: 4830 [2021-08-06 15:32:09,978 INFO L226 Difference]: Without dead ends: 4830 [2021-08-06 15:32:09,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:32:09,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4830 states. [2021-08-06 15:32:10,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4830 to 3250. [2021-08-06 15:32:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3250 states, 3249 states have (on average 3.515851031086488) internal successors, (11423), 3249 states have internal predecessors, (11423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:10,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3250 states to 3250 states and 11423 transitions. [2021-08-06 15:32:10,034 INFO L78 Accepts]: Start accepts. Automaton has 3250 states and 11423 transitions. Word has length 28 [2021-08-06 15:32:10,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:10,034 INFO L470 AbstractCegarLoop]: Abstraction has 3250 states and 11423 transitions. [2021-08-06 15:32:10,034 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) [2021-08-06 15:32:10,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3250 states and 11423 transitions. [2021-08-06 15:32:10,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:10,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:10,039 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] [2021-08-06 15:32:10,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-06 15:32:10,244 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 [2021-08-06 15:32:10,245 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:10,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:10,245 INFO L82 PathProgramCache]: Analyzing trace with hash -813882188, now seen corresponding path program 57 times [2021-08-06 15:32:10,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:10,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907913357] [2021-08-06 15:32:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:10,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:10,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:10,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907913357] [2021-08-06 15:32:10,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907913357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:10,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361926791] [2021-08-06 15:32:10,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:32:10,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:10,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:10,310 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) [2021-08-06 15:32:10,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 15:32:16,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:32:16,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:16,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:32:16,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:16,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361926791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:16,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:16,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:32:16,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538232878] [2021-08-06 15:32:16,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:32:16,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:16,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:32:16,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:32:16,507 INFO L87 Difference]: Start difference. First operand 3250 states and 11423 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) [2021-08-06 15:32:17,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:17,071 INFO L93 Difference]: Finished difference Result 6704 states and 21303 transitions. [2021-08-06 15:32:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:32:17,071 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 [2021-08-06 15:32:17,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:17,085 INFO L225 Difference]: With dead ends: 6704 [2021-08-06 15:32:17,085 INFO L226 Difference]: Without dead ends: 6704 [2021-08-06 15:32:17,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 317.2ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:32:17,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6704 states. [2021-08-06 15:32:17,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6704 to 3268. [2021-08-06 15:32:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3268 states, 3267 states have (on average 3.5157636975818796) internal successors, (11486), 3267 states have internal predecessors, (11486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 11486 transitions. [2021-08-06 15:32:17,172 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 11486 transitions. Word has length 28 [2021-08-06 15:32:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:17,172 INFO L470 AbstractCegarLoop]: Abstraction has 3268 states and 11486 transitions. [2021-08-06 15:32:17,172 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) [2021-08-06 15:32:17,173 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 11486 transitions. [2021-08-06 15:32:17,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:17,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:17,178 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] [2021-08-06 15:32:17,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:17,400 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 [2021-08-06 15:32:17,400 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:17,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:17,400 INFO L82 PathProgramCache]: Analyzing trace with hash -28968094, now seen corresponding path program 58 times [2021-08-06 15:32:17,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:17,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698572218] [2021-08-06 15:32:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:17,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:17,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:17,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698572218] [2021-08-06 15:32:17,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698572218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:17,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975274440] [2021-08-06 15:32:17,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:32:17,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:17,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:17,582 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) [2021-08-06 15:32:17,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 15:32:23,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:32:23,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:23,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:32:23,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:23,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975274440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:23,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:23,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:32:23,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623777735] [2021-08-06 15:32:23,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:32:23,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:23,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:32:23,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:32:23,727 INFO L87 Difference]: Start difference. First operand 3268 states and 11486 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) [2021-08-06 15:32:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:24,441 INFO L93 Difference]: Finished difference Result 6955 states and 22073 transitions. [2021-08-06 15:32:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 15:32:24,442 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 [2021-08-06 15:32:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:24,454 INFO L225 Difference]: With dead ends: 6955 [2021-08-06 15:32:24,454 INFO L226 Difference]: Without dead ends: 6955 [2021-08-06 15:32:24,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 15:32:24,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6955 states. [2021-08-06 15:32:24,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6955 to 3362. [2021-08-06 15:32:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3362 states, 3361 states have (on average 3.5087771496578397) internal successors, (11793), 3361 states have internal predecessors, (11793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:24,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3362 states to 3362 states and 11793 transitions. [2021-08-06 15:32:24,531 INFO L78 Accepts]: Start accepts. Automaton has 3362 states and 11793 transitions. Word has length 28 [2021-08-06 15:32:24,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:24,531 INFO L470 AbstractCegarLoop]: Abstraction has 3362 states and 11793 transitions. [2021-08-06 15:32:24,531 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) [2021-08-06 15:32:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3362 states and 11793 transitions. [2021-08-06 15:32:24,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:24,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:24,536 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] [2021-08-06 15:32:24,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:24,754 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 [2021-08-06 15:32:24,754 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:24,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:24,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1111990750, now seen corresponding path program 59 times [2021-08-06 15:32:24,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:24,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095589690] [2021-08-06 15:32:24,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:24,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:24,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:24,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095589690] [2021-08-06 15:32:24,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095589690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:24,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509736094] [2021-08-06 15:32:24,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:32:24,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:24,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:24,822 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) [2021-08-06 15:32:24,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 15:32:30,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:32:30,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:31,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:32:31,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:31,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509736094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:31,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:31,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:32:31,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52541104] [2021-08-06 15:32:31,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:32:31,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:31,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:32:31,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:32:31,184 INFO L87 Difference]: Start difference. First operand 3362 states and 11793 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) [2021-08-06 15:32:31,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:31,761 INFO L93 Difference]: Finished difference Result 7180 states and 22854 transitions. [2021-08-06 15:32:31,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:32:31,762 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 [2021-08-06 15:32:31,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:31,774 INFO L225 Difference]: With dead ends: 7180 [2021-08-06 15:32:31,774 INFO L226 Difference]: Without dead ends: 7144 [2021-08-06 15:32:31,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 331.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:32:31,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2021-08-06 15:32:31,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 3752. [2021-08-06 15:32:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3752 states, 3751 states have (on average 3.5339909357504666) internal successors, (13256), 3751 states have internal predecessors, (13256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:31,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3752 states to 3752 states and 13256 transitions. [2021-08-06 15:32:31,856 INFO L78 Accepts]: Start accepts. Automaton has 3752 states and 13256 transitions. Word has length 28 [2021-08-06 15:32:31,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:31,856 INFO L470 AbstractCegarLoop]: Abstraction has 3752 states and 13256 transitions. [2021-08-06 15:32:31,856 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) [2021-08-06 15:32:31,856 INFO L276 IsEmpty]: Start isEmpty. Operand 3752 states and 13256 transitions. [2021-08-06 15:32:31,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:31,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:31,861 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] [2021-08-06 15:32:31,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:32,074 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 [2021-08-06 15:32:32,075 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:32,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:32,075 INFO L82 PathProgramCache]: Analyzing trace with hash 359087368, now seen corresponding path program 60 times [2021-08-06 15:32:32,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:32,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609858260] [2021-08-06 15:32:32,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:32,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:32,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:32,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609858260] [2021-08-06 15:32:32,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609858260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:32,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937157812] [2021-08-06 15:32:32,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:32:32,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:32,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:32,137 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) [2021-08-06 15:32:32,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 15:32:38,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:32:38,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:38,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:32:38,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:38,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937157812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:38,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:38,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:32:38,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830397] [2021-08-06 15:32:38,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:32:38,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:38,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:32:38,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:32:38,471 INFO L87 Difference]: Start difference. First operand 3752 states and 13256 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) [2021-08-06 15:32:39,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:39,056 INFO L93 Difference]: Finished difference Result 7377 states and 23394 transitions. [2021-08-06 15:32:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:32:39,056 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 [2021-08-06 15:32:39,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:39,069 INFO L225 Difference]: With dead ends: 7377 [2021-08-06 15:32:39,069 INFO L226 Difference]: Without dead ends: 7377 [2021-08-06 15:32:39,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 350.9ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:32:39,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7377 states. [2021-08-06 15:32:39,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7377 to 3446. [2021-08-06 15:32:39,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3446 states, 3445 states have (on average 3.49288824383164) internal successors, (12033), 3445 states have internal predecessors, (12033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3446 states to 3446 states and 12033 transitions. [2021-08-06 15:32:39,149 INFO L78 Accepts]: Start accepts. Automaton has 3446 states and 12033 transitions. Word has length 28 [2021-08-06 15:32:39,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:39,150 INFO L470 AbstractCegarLoop]: Abstraction has 3446 states and 12033 transitions. [2021-08-06 15:32:39,150 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) [2021-08-06 15:32:39,150 INFO L276 IsEmpty]: Start isEmpty. Operand 3446 states and 12033 transitions. [2021-08-06 15:32:39,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:39,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:39,154 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] [2021-08-06 15:32:39,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:39,355 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 [2021-08-06 15:32:39,355 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:39,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:39,356 INFO L82 PathProgramCache]: Analyzing trace with hash -73789236, now seen corresponding path program 61 times [2021-08-06 15:32:39,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:39,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645492966] [2021-08-06 15:32:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:39,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:39,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:39,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645492966] [2021-08-06 15:32:39,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645492966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:39,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235532685] [2021-08-06 15:32:39,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:32:39,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:39,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:39,429 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) [2021-08-06 15:32:39,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 15:32:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:45,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:32:45,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:45,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235532685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:45,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:45,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:32:45,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434846518] [2021-08-06 15:32:45,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:32:45,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:45,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:32:45,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:32:45,748 INFO L87 Difference]: Start difference. First operand 3446 states and 12033 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) [2021-08-06 15:32:46,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:46,329 INFO L93 Difference]: Finished difference Result 6414 states and 20679 transitions. [2021-08-06 15:32:46,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 15:32:46,330 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 [2021-08-06 15:32:46,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:46,344 INFO L225 Difference]: With dead ends: 6414 [2021-08-06 15:32:46,344 INFO L226 Difference]: Without dead ends: 6410 [2021-08-06 15:32:46,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 325.4ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 15:32:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6410 states. [2021-08-06 15:32:46,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6410 to 3206. [2021-08-06 15:32:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3206 states, 3205 states have (on average 3.514820592823713) internal successors, (11265), 3205 states have internal predecessors, (11265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3206 states to 3206 states and 11265 transitions. [2021-08-06 15:32:46,426 INFO L78 Accepts]: Start accepts. Automaton has 3206 states and 11265 transitions. Word has length 28 [2021-08-06 15:32:46,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:46,427 INFO L470 AbstractCegarLoop]: Abstraction has 3206 states and 11265 transitions. [2021-08-06 15:32:46,427 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) [2021-08-06 15:32:46,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states and 11265 transitions. [2021-08-06 15:32:46,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:46,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:46,433 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] [2021-08-06 15:32:46,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:46,660 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 [2021-08-06 15:32:46,661 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:46,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:46,661 INFO L82 PathProgramCache]: Analyzing trace with hash -345798426, now seen corresponding path program 62 times [2021-08-06 15:32:46,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:46,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000156756] [2021-08-06 15:32:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:46,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:46,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:46,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000156756] [2021-08-06 15:32:46,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000156756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:46,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595607655] [2021-08-06 15:32:46,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:32:46,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:46,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:46,773 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) [2021-08-06 15:32:46,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 15:32:53,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:32:53,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:53,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:32:53,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:53,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595607655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:53,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:53,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 15:32:53,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928246328] [2021-08-06 15:32:53,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:32:53,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:53,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:32:53,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:32:53,250 INFO L87 Difference]: Start difference. First operand 3206 states and 11265 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:54,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:54,275 INFO L93 Difference]: Finished difference Result 9639 states and 31440 transitions. [2021-08-06 15:32:54,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-06 15:32:54,275 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:32:54,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:54,296 INFO L225 Difference]: With dead ends: 9639 [2021-08-06 15:32:54,296 INFO L226 Difference]: Without dead ends: 9639 [2021-08-06 15:32:54,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 573.2ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 15:32:54,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9639 states. [2021-08-06 15:32:54,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9639 to 3390. [2021-08-06 15:32:54,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3390 states, 3389 states have (on average 3.5821776335202125) internal successors, (12140), 3389 states have internal predecessors, (12140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3390 states to 3390 states and 12140 transitions. [2021-08-06 15:32:54,441 INFO L78 Accepts]: Start accepts. Automaton has 3390 states and 12140 transitions. Word has length 28 [2021-08-06 15:32:54,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:54,441 INFO L470 AbstractCegarLoop]: Abstraction has 3390 states and 12140 transitions. [2021-08-06 15:32:54,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3390 states and 12140 transitions. [2021-08-06 15:32:54,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:32:54,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:54,446 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] [2021-08-06 15:32:54,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:54,661 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 [2021-08-06 15:32:54,661 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:54,662 INFO L82 PathProgramCache]: Analyzing trace with hash 221153654, now seen corresponding path program 63 times [2021-08-06 15:32:54,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:54,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398403444] [2021-08-06 15:32:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:54,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:54,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:54,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398403444] [2021-08-06 15:32:54,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398403444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:54,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582663669] [2021-08-06 15:32:54,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:32:54,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:54,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:54,749 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) [2021-08-06 15:32:54,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 15:33:00,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:33:00,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:00,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:00,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:01,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582663669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:01,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:01,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 15:33:01,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930481404] [2021-08-06 15:33:01,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:33:01,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:01,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:33:01,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:33:01,042 INFO L87 Difference]: Start difference. First operand 3390 states and 12140 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:01,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:01,776 INFO L93 Difference]: Finished difference Result 9464 states and 30965 transitions. [2021-08-06 15:33:01,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-06 15:33:01,776 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:33:01,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:01,794 INFO L225 Difference]: With dead ends: 9464 [2021-08-06 15:33:01,794 INFO L226 Difference]: Without dead ends: 9464 [2021-08-06 15:33:01,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 412.9ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 15:33:01,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9464 states. [2021-08-06 15:33:01,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9464 to 3356. [2021-08-06 15:33:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 3.5657228017883758) internal successors, (11963), 3355 states have internal predecessors, (11963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 11963 transitions. [2021-08-06 15:33:01,892 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 11963 transitions. Word has length 28 [2021-08-06 15:33:01,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:01,892 INFO L470 AbstractCegarLoop]: Abstraction has 3356 states and 11963 transitions. [2021-08-06 15:33:01,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:01,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 11963 transitions. [2021-08-06 15:33:01,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:33:01,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:01,897 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] [2021-08-06 15:33:01,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:02,116 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 [2021-08-06 15:33:02,117 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:02,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:02,117 INFO L82 PathProgramCache]: Analyzing trace with hash -951192204, now seen corresponding path program 64 times [2021-08-06 15:33:02,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:02,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326983327] [2021-08-06 15:33:02,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:02,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:02,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:02,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326983327] [2021-08-06 15:33:02,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326983327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:02,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417130259] [2021-08-06 15:33:02,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:33:02,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:02,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:02,190 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) [2021-08-06 15:33:02,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 15:33:08,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:33:08,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:08,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:08,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:08,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417130259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:08,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:08,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 15:33:08,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600182346] [2021-08-06 15:33:08,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:33:08,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:08,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:33:08,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:33:08,246 INFO L87 Difference]: Start difference. First operand 3356 states and 11963 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) [2021-08-06 15:33:09,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:09,108 INFO L93 Difference]: Finished difference Result 8918 states and 28262 transitions. [2021-08-06 15:33:09,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 15:33:09,108 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 [2021-08-06 15:33:09,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:09,125 INFO L225 Difference]: With dead ends: 8918 [2021-08-06 15:33:09,125 INFO L226 Difference]: Without dead ends: 8918 [2021-08-06 15:33:09,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 458.1ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 15:33:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8918 states. [2021-08-06 15:33:09,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8918 to 3376. [2021-08-06 15:33:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3376 states, 3375 states have (on average 3.568888888888889) internal successors, (12045), 3375 states have internal predecessors, (12045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:09,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3376 states to 3376 states and 12045 transitions. [2021-08-06 15:33:09,224 INFO L78 Accepts]: Start accepts. Automaton has 3376 states and 12045 transitions. Word has length 28 [2021-08-06 15:33:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:09,224 INFO L470 AbstractCegarLoop]: Abstraction has 3376 states and 12045 transitions. [2021-08-06 15:33:09,224 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) [2021-08-06 15:33:09,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3376 states and 12045 transitions. [2021-08-06 15:33:09,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:33:09,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:09,230 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] [2021-08-06 15:33:09,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:09,444 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 [2021-08-06 15:33:09,445 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:09,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:09,445 INFO L82 PathProgramCache]: Analyzing trace with hash -869816116, now seen corresponding path program 65 times [2021-08-06 15:33:09,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:09,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451645009] [2021-08-06 15:33:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:09,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:09,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:09,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:09,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451645009] [2021-08-06 15:33:09,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451645009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:09,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621701341] [2021-08-06 15:33:09,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:33:09,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:09,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:09,553 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) [2021-08-06 15:33:09,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 15:33:15,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:33:15,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:15,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:15,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:16,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621701341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:16,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:16,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 15:33:16,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506054537] [2021-08-06 15:33:16,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:33:16,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:16,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:33:16,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:33:16,011 INFO L87 Difference]: Start difference. First operand 3376 states and 12045 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) [2021-08-06 15:33:16,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:16,921 INFO L93 Difference]: Finished difference Result 8426 states and 27069 transitions. [2021-08-06 15:33:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 15:33:16,921 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 [2021-08-06 15:33:16,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:16,938 INFO L225 Difference]: With dead ends: 8426 [2021-08-06 15:33:16,938 INFO L226 Difference]: Without dead ends: 8418 [2021-08-06 15:33:16,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 461.6ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:33:16,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2021-08-06 15:33:17,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 3358. [2021-08-06 15:33:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3358 states, 3357 states have (on average 3.5650878760798332) internal successors, (11968), 3357 states have internal predecessors, (11968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:17,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3358 states to 3358 states and 11968 transitions. [2021-08-06 15:33:17,034 INFO L78 Accepts]: Start accepts. Automaton has 3358 states and 11968 transitions. Word has length 28 [2021-08-06 15:33:17,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:17,034 INFO L470 AbstractCegarLoop]: Abstraction has 3358 states and 11968 transitions. [2021-08-06 15:33:17,034 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) [2021-08-06 15:33:17,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3358 states and 11968 transitions. [2021-08-06 15:33:17,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:33:17,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:17,039 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] [2021-08-06 15:33:17,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-06 15:33:17,264 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 [2021-08-06 15:33:17,265 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:17,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:17,265 INFO L82 PathProgramCache]: Analyzing trace with hash 60841100, now seen corresponding path program 66 times [2021-08-06 15:33:17,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:17,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000153748] [2021-08-06 15:33:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:17,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:17,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:17,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000153748] [2021-08-06 15:33:17,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000153748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:17,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234167256] [2021-08-06 15:33:17,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:33:17,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:17,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:17,333 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) [2021-08-06 15:33:17,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 15:33:23,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:33:23,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:23,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:23,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:23,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234167256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:23,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:23,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 15:33:23,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245930451] [2021-08-06 15:33:23,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:33:23,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:23,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:33:23,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:33:23,901 INFO L87 Difference]: Start difference. First operand 3358 states and 11968 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) [2021-08-06 15:33:24,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:24,822 INFO L93 Difference]: Finished difference Result 8345 states and 26819 transitions. [2021-08-06 15:33:24,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 15:33:24,823 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 [2021-08-06 15:33:24,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:24,839 INFO L225 Difference]: With dead ends: 8345 [2021-08-06 15:33:24,839 INFO L226 Difference]: Without dead ends: 8345 [2021-08-06 15:33:24,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 516.9ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 15:33:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8345 states. [2021-08-06 15:33:24,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8345 to 3374. [2021-08-06 15:33:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3374 states, 3373 states have (on average 3.5671509042395493) internal successors, (12032), 3373 states have internal predecessors, (12032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3374 states to 3374 states and 12032 transitions. [2021-08-06 15:33:24,927 INFO L78 Accepts]: Start accepts. Automaton has 3374 states and 12032 transitions. Word has length 28 [2021-08-06 15:33:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:24,927 INFO L470 AbstractCegarLoop]: Abstraction has 3374 states and 12032 transitions. [2021-08-06 15:33:24,927 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) [2021-08-06 15:33:24,927 INFO L276 IsEmpty]: Start isEmpty. Operand 3374 states and 12032 transitions. [2021-08-06 15:33:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:33:24,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:24,932 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] [2021-08-06 15:33:24,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:25,133 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 [2021-08-06 15:33:25,133 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:25,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:25,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1703880254, now seen corresponding path program 67 times [2021-08-06 15:33:25,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:25,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68654375] [2021-08-06 15:33:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:25,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:25,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:25,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68654375] [2021-08-06 15:33:25,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68654375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:25,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523060378] [2021-08-06 15:33:25,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:33:25,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:25,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:25,260 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) [2021-08-06 15:33:25,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 15:33:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:31,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:31,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:31,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523060378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:31,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:31,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 15:33:31,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133688044] [2021-08-06 15:33:31,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:33:31,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:31,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:33:31,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:33:31,793 INFO L87 Difference]: Start difference. First operand 3374 states and 12032 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) [2021-08-06 15:33:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:32,656 INFO L93 Difference]: Finished difference Result 8006 states and 26017 transitions. [2021-08-06 15:33:32,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-06 15:33:32,656 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 [2021-08-06 15:33:32,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:32,670 INFO L225 Difference]: With dead ends: 8006 [2021-08-06 15:33:32,670 INFO L226 Difference]: Without dead ends: 7998 [2021-08-06 15:33:32,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 475.1ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:33:32,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7998 states. [2021-08-06 15:33:32,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7998 to 3131. [2021-08-06 15:33:32,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 3130 states have (on average 3.4920127795527156) internal successors, (10930), 3130 states have internal predecessors, (10930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:32,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 10930 transitions. [2021-08-06 15:33:32,758 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 10930 transitions. Word has length 28 [2021-08-06 15:33:32,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:32,759 INFO L470 AbstractCegarLoop]: Abstraction has 3131 states and 10930 transitions. [2021-08-06 15:33:32,759 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) [2021-08-06 15:33:32,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 10930 transitions. [2021-08-06 15:33:32,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:33:32,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:32,763 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] [2021-08-06 15:33:32,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:32,988 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 [2021-08-06 15:33:32,989 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:32,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:32,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1787283834, now seen corresponding path program 68 times [2021-08-06 15:33:32,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:32,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381617134] [2021-08-06 15:33:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:32,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:33,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:33,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381617134] [2021-08-06 15:33:33,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381617134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:33,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299705480] [2021-08-06 15:33:33,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:33:33,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:33,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:33,093 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) [2021-08-06 15:33:33,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 15:33:39,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:33:39,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:39,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:39,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:39,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299705480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:39,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:39,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-06 15:33:39,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972234055] [2021-08-06 15:33:39,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:33:39,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:39,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:33:39,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:33:39,716 INFO L87 Difference]: Start difference. First operand 3131 states and 10930 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) [2021-08-06 15:33:40,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:40,565 INFO L93 Difference]: Finished difference Result 6247 states and 20021 transitions. [2021-08-06 15:33:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 15:33:40,566 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 [2021-08-06 15:33:40,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:40,577 INFO L225 Difference]: With dead ends: 6247 [2021-08-06 15:33:40,577 INFO L226 Difference]: Without dead ends: 6247 [2021-08-06 15:33:40,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 486.6ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 15:33:40,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6247 states. [2021-08-06 15:33:40,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6247 to 3143. [2021-08-06 15:33:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3143 states, 3142 states have (on average 3.4907702100572884) internal successors, (10968), 3142 states have internal predecessors, (10968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:40,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3143 states to 3143 states and 10968 transitions. [2021-08-06 15:33:40,644 INFO L78 Accepts]: Start accepts. Automaton has 3143 states and 10968 transitions. Word has length 28 [2021-08-06 15:33:40,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:40,644 INFO L470 AbstractCegarLoop]: Abstraction has 3143 states and 10968 transitions. [2021-08-06 15:33:40,644 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) [2021-08-06 15:33:40,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3143 states and 10968 transitions. [2021-08-06 15:33:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:33:40,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:40,649 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] [2021-08-06 15:33:40,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:40,876 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 [2021-08-06 15:33:40,877 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:40,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:40,877 INFO L82 PathProgramCache]: Analyzing trace with hash -854323286, now seen corresponding path program 69 times [2021-08-06 15:33:40,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:40,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549314482] [2021-08-06 15:33:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:40,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:40,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:40,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549314482] [2021-08-06 15:33:40,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549314482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:40,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066772093] [2021-08-06 15:33:40,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:33:40,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:40,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:40,977 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) [2021-08-06 15:33:40,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 15:33:47,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:33:47,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:47,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:47,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:47,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066772093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:47,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:47,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 15:33:47,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176380654] [2021-08-06 15:33:47,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:33:47,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:47,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:33:47,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:33:47,316 INFO L87 Difference]: Start difference. First operand 3143 states and 10968 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-08-06 15:33:48,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:48,288 INFO L93 Difference]: Finished difference Result 7059 states and 22090 transitions. [2021-08-06 15:33:48,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 15:33:48,288 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 [2021-08-06 15:33:48,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:48,300 INFO L225 Difference]: With dead ends: 7059 [2021-08-06 15:33:48,300 INFO L226 Difference]: Without dead ends: 7059 [2021-08-06 15:33:48,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 617.1ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 15:33:48,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7059 states. [2021-08-06 15:33:48,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7059 to 3209. [2021-08-06 15:33:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 3208 states have (on average 3.486596009975062) internal successors, (11185), 3208 states have internal predecessors, (11185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:48,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 11185 transitions. [2021-08-06 15:33:48,370 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 11185 transitions. Word has length 28 [2021-08-06 15:33:48,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:48,370 INFO L470 AbstractCegarLoop]: Abstraction has 3209 states and 11185 transitions. [2021-08-06 15:33:48,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-08-06 15:33:48,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 11185 transitions. [2021-08-06 15:33:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:33:48,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:48,375 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] [2021-08-06 15:33:48,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:48,588 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 [2021-08-06 15:33:48,589 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:48,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:48,589 INFO L82 PathProgramCache]: Analyzing trace with hash 788715868, now seen corresponding path program 70 times [2021-08-06 15:33:48,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:48,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582220464] [2021-08-06 15:33:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:48,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:48,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:48,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582220464] [2021-08-06 15:33:48,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582220464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:48,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936993322] [2021-08-06 15:33:48,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:33:48,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:48,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:48,710 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) [2021-08-06 15:33:48,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 15:33:55,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:33:55,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:55,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:33:55,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:55,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936993322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:55,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:55,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 15:33:55,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129048825] [2021-08-06 15:33:55,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:33:55,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:55,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:33:55,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:33:55,271 INFO L87 Difference]: Start difference. First operand 3209 states and 11185 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-08-06 15:33:56,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:56,127 INFO L93 Difference]: Finished difference Result 6576 states and 20836 transitions. [2021-08-06 15:33:56,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-06 15:33:56,127 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 [2021-08-06 15:33:56,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:56,139 INFO L225 Difference]: With dead ends: 6576 [2021-08-06 15:33:56,139 INFO L226 Difference]: Without dead ends: 6572 [2021-08-06 15:33:56,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 521.3ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 15:33:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6572 states. [2021-08-06 15:33:56,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6572 to 3135. [2021-08-06 15:33:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 3134 states have (on average 3.482769623484365) internal successors, (10915), 3134 states have internal predecessors, (10915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 10915 transitions. [2021-08-06 15:33:56,244 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 10915 transitions. Word has length 28 [2021-08-06 15:33:56,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:56,244 INFO L470 AbstractCegarLoop]: Abstraction has 3135 states and 10915 transitions. [2021-08-06 15:33:56,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-08-06 15:33:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 10915 transitions. [2021-08-06 15:33:56,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:33:56,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:56,249 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] [2021-08-06 15:33:56,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-06 15:33:56,468 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 [2021-08-06 15:33:56,469 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:56,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:56,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1368159092, now seen corresponding path program 65 times [2021-08-06 15:33:56,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:56,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178422476] [2021-08-06 15:33:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:56,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:56,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:56,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178422476] [2021-08-06 15:33:56,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178422476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:56,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570795743] [2021-08-06 15:33:56,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:33:56,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:56,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:56,629 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) [2021-08-06 15:33:56,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 15:34:02,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:34:02,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:02,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:34:02,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:03,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570795743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:03,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:03,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-06 15:34:03,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971236002] [2021-08-06 15:34:03,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:34:03,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:03,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:34:03,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:34:03,073 INFO L87 Difference]: Start difference. First operand 3135 states and 10915 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-08-06 15:34:03,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:03,671 INFO L93 Difference]: Finished difference Result 5698 states and 18353 transitions. [2021-08-06 15:34:03,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 15:34:03,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 [2021-08-06 15:34:03,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:03,682 INFO L225 Difference]: With dead ends: 5698 [2021-08-06 15:34:03,682 INFO L226 Difference]: Without dead ends: 5698 [2021-08-06 15:34:03,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 328.2ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:34:03,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5698 states. [2021-08-06 15:34:03,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5698 to 3135. [2021-08-06 15:34:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 3134 states have (on average 3.48468410976388) internal successors, (10921), 3134 states have internal predecessors, (10921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 10921 transitions. [2021-08-06 15:34:03,736 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 10921 transitions. Word has length 28 [2021-08-06 15:34:03,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:03,736 INFO L470 AbstractCegarLoop]: Abstraction has 3135 states and 10921 transitions. [2021-08-06 15:34:03,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-08-06 15:34:03,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 10921 transitions. [2021-08-06 15:34:03,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:34:03,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:03,740 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] [2021-08-06 15:34:03,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:03,966 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 [2021-08-06 15:34:03,966 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:03,966 INFO L82 PathProgramCache]: Analyzing trace with hash -243640670, now seen corresponding path program 66 times [2021-08-06 15:34:03,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:03,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282391627] [2021-08-06 15:34:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:03,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:04,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:04,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282391627] [2021-08-06 15:34:04,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282391627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:04,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761748004] [2021-08-06 15:34:04,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:34:04,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:04,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:04,041 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) [2021-08-06 15:34:04,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 15:34:10,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:34:10,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:10,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:34:10,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:10,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761748004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:10,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:10,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-06 15:34:10,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264544948] [2021-08-06 15:34:10,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:34:10,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:10,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:34:10,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:34:10,486 INFO L87 Difference]: Start difference. First operand 3135 states and 10921 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-08-06 15:34:11,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:11,176 INFO L93 Difference]: Finished difference Result 6052 states and 19348 transitions. [2021-08-06 15:34:11,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 15:34:11,176 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 [2021-08-06 15:34:11,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:11,187 INFO L225 Difference]: With dead ends: 6052 [2021-08-06 15:34:11,187 INFO L226 Difference]: Without dead ends: 6052 [2021-08-06 15:34:11,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 413.6ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:34:11,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6052 states. [2021-08-06 15:34:11,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6052 to 3126. [2021-08-06 15:34:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3126 states, 3125 states have (on average 3.4848) internal successors, (10890), 3125 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3126 states to 3126 states and 10890 transitions. [2021-08-06 15:34:11,253 INFO L78 Accepts]: Start accepts. Automaton has 3126 states and 10890 transitions. Word has length 28 [2021-08-06 15:34:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:11,253 INFO L470 AbstractCegarLoop]: Abstraction has 3126 states and 10890 transitions. [2021-08-06 15:34:11,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-08-06 15:34:11,253 INFO L276 IsEmpty]: Start isEmpty. Operand 3126 states and 10890 transitions. [2021-08-06 15:34:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:34:11,258 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:11,258 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] [2021-08-06 15:34:11,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-06 15:34:11,471 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 [2021-08-06 15:34:11,471 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:11,472 INFO L82 PathProgramCache]: Analyzing trace with hash -475180318, now seen corresponding path program 67 times [2021-08-06 15:34:11,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:11,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134928098] [2021-08-06 15:34:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:11,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:11,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:11,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134928098] [2021-08-06 15:34:11,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134928098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:11,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699068389] [2021-08-06 15:34:11,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:34:11,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:11,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:11,544 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) [2021-08-06 15:34:11,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 15:34:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:17,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:34:17,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:18,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699068389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:18,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:18,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-06 15:34:18,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953553302] [2021-08-06 15:34:18,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:34:18,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:18,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:34:18,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:34:18,046 INFO L87 Difference]: Start difference. First operand 3126 states and 10890 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-08-06 15:34:18,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:18,822 INFO L93 Difference]: Finished difference Result 6522 states and 20619 transitions. [2021-08-06 15:34:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 15:34:18,823 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 [2021-08-06 15:34:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:18,838 INFO L225 Difference]: With dead ends: 6522 [2021-08-06 15:34:18,839 INFO L226 Difference]: Without dead ends: 6522 [2021-08-06 15:34:18,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 444.5ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 15:34:18,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6522 states. [2021-08-06 15:34:18,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6522 to 3186. [2021-08-06 15:34:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 3.4813186813186814) internal successors, (11088), 3185 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 11088 transitions. [2021-08-06 15:34:18,910 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 11088 transitions. Word has length 28 [2021-08-06 15:34:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:18,910 INFO L470 AbstractCegarLoop]: Abstraction has 3186 states and 11088 transitions. [2021-08-06 15:34:18,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-08-06 15:34:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 11088 transitions. [2021-08-06 15:34:18,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:34:18,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:18,915 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] [2021-08-06 15:34:18,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:19,125 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 [2021-08-06 15:34:19,125 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:19,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:19,125 INFO L82 PathProgramCache]: Analyzing trace with hash -520001460, now seen corresponding path program 68 times [2021-08-06 15:34:19,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:19,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464594628] [2021-08-06 15:34:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:19,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:19,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:19,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464594628] [2021-08-06 15:34:19,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464594628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:19,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113745109] [2021-08-06 15:34:19,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:19,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:19,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:19,203 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) [2021-08-06 15:34:19,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 15:34:25,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:25,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:25,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:34:25,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:25,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113745109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:25,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:25,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-06 15:34:25,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704290356] [2021-08-06 15:34:25,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:34:25,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:25,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:34:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:34:25,742 INFO L87 Difference]: Start difference. First operand 3186 states and 11088 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-08-06 15:34:26,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:26,422 INFO L93 Difference]: Finished difference Result 6037 states and 19400 transitions. [2021-08-06 15:34:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 15:34:26,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 [2021-08-06 15:34:26,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:26,434 INFO L225 Difference]: With dead ends: 6037 [2021-08-06 15:34:26,434 INFO L226 Difference]: Without dead ends: 6033 [2021-08-06 15:34:26,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 382.9ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 15:34:26,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6033 states. [2021-08-06 15:34:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6033 to 3124. [2021-08-06 15:34:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 3.484149855907781) internal successors, (10881), 3123 states have internal predecessors, (10881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 10881 transitions. [2021-08-06 15:34:26,500 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 10881 transitions. Word has length 28 [2021-08-06 15:34:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:26,501 INFO L470 AbstractCegarLoop]: Abstraction has 3124 states and 10881 transitions. [2021-08-06 15:34:26,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-08-06 15:34:26,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 10881 transitions. [2021-08-06 15:34:26,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:34:26,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:26,505 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] [2021-08-06 15:34:26,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:26,728 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 [2021-08-06 15:34:26,729 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:26,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:26,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1500256008, now seen corresponding path program 71 times [2021-08-06 15:34:26,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:26,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838159512] [2021-08-06 15:34:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:26,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:26,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:26,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838159512] [2021-08-06 15:34:26,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838159512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:26,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473960345] [2021-08-06 15:34:26,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:34:26,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:26,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:26,788 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) [2021-08-06 15:34:26,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 15:34:33,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:34:33,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:33,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:34:33,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:33,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473960345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:33,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:33,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 15:34:33,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579161697] [2021-08-06 15:34:33,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:34:33,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:33,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:34:33,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:34:33,280 INFO L87 Difference]: Start difference. First operand 3124 states and 10881 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) [2021-08-06 15:34:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:34,175 INFO L93 Difference]: Finished difference Result 6297 states and 20118 transitions. [2021-08-06 15:34:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:34:34,175 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 [2021-08-06 15:34:34,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:34,186 INFO L225 Difference]: With dead ends: 6297 [2021-08-06 15:34:34,186 INFO L226 Difference]: Without dead ends: 6288 [2021-08-06 15:34:34,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 556.0ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:34:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6288 states. [2021-08-06 15:34:34,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6288 to 3340. [2021-08-06 15:34:34,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 3.5390835579514826) internal successors, (11817), 3339 states have internal predecessors, (11817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:34,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 11817 transitions. [2021-08-06 15:34:34,259 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 11817 transitions. Word has length 28 [2021-08-06 15:34:34,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:34,259 INFO L470 AbstractCegarLoop]: Abstraction has 3340 states and 11817 transitions. [2021-08-06 15:34:34,259 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) [2021-08-06 15:34:34,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 11817 transitions. [2021-08-06 15:34:34,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:34:34,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:34,264 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] [2021-08-06 15:34:34,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:34,488 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 [2021-08-06 15:34:34,489 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:34,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:34,489 INFO L82 PathProgramCache]: Analyzing trace with hash -753369888, now seen corresponding path program 72 times [2021-08-06 15:34:34,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:34,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183953513] [2021-08-06 15:34:34,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:34,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:34,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:34,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183953513] [2021-08-06 15:34:34,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183953513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:34,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214668942] [2021-08-06 15:34:34,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:34:34,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:34,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:34,550 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) [2021-08-06 15:34:34,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 15:34:40,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:34:40,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:40,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:34:40,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:41,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214668942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:41,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:41,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 15:34:41,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903126514] [2021-08-06 15:34:41,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:34:41,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:41,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:34:41,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:34:41,073 INFO L87 Difference]: Start difference. First operand 3340 states and 11817 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) [2021-08-06 15:34:41,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:41,780 INFO L93 Difference]: Finished difference Result 6393 states and 20404 transitions. [2021-08-06 15:34:41,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:34:41,781 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 [2021-08-06 15:34:41,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:41,791 INFO L225 Difference]: With dead ends: 6393 [2021-08-06 15:34:41,791 INFO L226 Difference]: Without dead ends: 6393 [2021-08-06 15:34:41,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 410.4ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:34:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6393 states. [2021-08-06 15:34:41,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6393 to 3341. [2021-08-06 15:34:41,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 3340 states have (on average 3.5335329341317365) internal successors, (11802), 3340 states have internal predecessors, (11802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 11802 transitions. [2021-08-06 15:34:41,858 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 11802 transitions. Word has length 28 [2021-08-06 15:34:41,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:41,859 INFO L470 AbstractCegarLoop]: Abstraction has 3341 states and 11802 transitions. [2021-08-06 15:34:41,859 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) [2021-08-06 15:34:41,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 11802 transitions. [2021-08-06 15:34:41,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:34:41,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:41,864 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] [2021-08-06 15:34:41,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:42,076 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 [2021-08-06 15:34:42,077 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1956776178, now seen corresponding path program 73 times [2021-08-06 15:34:42,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:42,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056872105] [2021-08-06 15:34:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:42,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:42,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:42,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056872105] [2021-08-06 15:34:42,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056872105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:42,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189330733] [2021-08-06 15:34:42,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:34:42,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:42,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:42,142 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) [2021-08-06 15:34:42,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 15:34:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:48,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:34:48,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:48,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189330733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:48,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:48,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 15:34:48,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745913951] [2021-08-06 15:34:48,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:34:48,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:48,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:34:48,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:34:48,734 INFO L87 Difference]: Start difference. First operand 3341 states and 11802 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) [2021-08-06 15:34:49,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:49,127 INFO L93 Difference]: Finished difference Result 5807 states and 19318 transitions. [2021-08-06 15:34:49,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:34:49,128 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 [2021-08-06 15:34:49,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:49,138 INFO L225 Difference]: With dead ends: 5807 [2021-08-06 15:34:49,139 INFO L226 Difference]: Without dead ends: 5674 [2021-08-06 15:34:49,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:34:49,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2021-08-06 15:34:49,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 4004. [2021-08-06 15:34:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4004 states, 4003 states have (on average 3.593055208593555) internal successors, (14383), 4003 states have internal predecessors, (14383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:49,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4004 states to 4004 states and 14383 transitions. [2021-08-06 15:34:49,209 INFO L78 Accepts]: Start accepts. Automaton has 4004 states and 14383 transitions. Word has length 28 [2021-08-06 15:34:49,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:49,209 INFO L470 AbstractCegarLoop]: Abstraction has 4004 states and 14383 transitions. [2021-08-06 15:34:49,209 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) [2021-08-06 15:34:49,209 INFO L276 IsEmpty]: Start isEmpty. Operand 4004 states and 14383 transitions. [2021-08-06 15:34:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:34:49,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:49,215 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] [2021-08-06 15:34:49,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:49,428 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 [2021-08-06 15:34:49,429 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:49,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:49,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1517808082, now seen corresponding path program 74 times [2021-08-06 15:34:49,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:49,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410240801] [2021-08-06 15:34:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:49,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:34:49,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:49,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410240801] [2021-08-06 15:34:49,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410240801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:49,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335269513] [2021-08-06 15:34:49,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:49,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:49,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:49,487 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) [2021-08-06 15:34:49,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-06 15:34:55,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:55,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:55,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:55,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:34:56,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335269513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:56,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:56,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-06 15:34:56,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913434771] [2021-08-06 15:34:56,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:34:56,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:56,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:34:56,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:34:56,010 INFO L87 Difference]: Start difference. First operand 4004 states and 14383 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-08-06 15:34:56,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:56,155 INFO L93 Difference]: Finished difference Result 5542 states and 18750 transitions. [2021-08-06 15:34:56,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:34:56,156 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 [2021-08-06 15:34:56,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:56,165 INFO L225 Difference]: With dead ends: 5542 [2021-08-06 15:34:56,165 INFO L226 Difference]: Without dead ends: 5542 [2021-08-06 15:34:56,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:34:56,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5542 states. [2021-08-06 15:34:56,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5542 to 3942. [2021-08-06 15:34:56,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 3941 states have (on average 3.5922354732301445) internal successors, (14157), 3941 states have internal predecessors, (14157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:56,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 14157 transitions. [2021-08-06 15:34:56,231 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 14157 transitions. Word has length 28 [2021-08-06 15:34:56,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:56,231 INFO L470 AbstractCegarLoop]: Abstraction has 3942 states and 14157 transitions. [2021-08-06 15:34:56,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-08-06 15:34:56,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 14157 transitions. [2021-08-06 15:34:56,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:34:56,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:56,237 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] [2021-08-06 15:34:56,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:56,464 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 [2021-08-06 15:34:56,465 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:56,465 INFO L82 PathProgramCache]: Analyzing trace with hash 181438546, now seen corresponding path program 75 times [2021-08-06 15:34:56,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:56,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782135910] [2021-08-06 15:34:56,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:56,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:56,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:56,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782135910] [2021-08-06 15:34:56,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782135910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:56,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781496262] [2021-08-06 15:34:56,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:34:56,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:56,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:56,535 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) [2021-08-06 15:34:56,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-06 15:35:02,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:35:02,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:02,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:35:02,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:02,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781496262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:02,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:02,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 15:35:02,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801523715] [2021-08-06 15:35:02,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:35:02,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:02,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:35:02,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:35:02,891 INFO L87 Difference]: Start difference. First operand 3942 states and 14157 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) [2021-08-06 15:35:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:03,536 INFO L93 Difference]: Finished difference Result 9138 states and 30222 transitions. [2021-08-06 15:35:03,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 15:35:03,536 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 [2021-08-06 15:35:03,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:03,554 INFO L225 Difference]: With dead ends: 9138 [2021-08-06 15:35:03,554 INFO L226 Difference]: Without dead ends: 9138 [2021-08-06 15:35:03,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 378.7ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 15:35:03,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9138 states. [2021-08-06 15:35:03,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9138 to 4263. [2021-08-06 15:35:03,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4263 states, 4262 states have (on average 3.6187236039418114) internal successors, (15423), 4262 states have internal predecessors, (15423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:03,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 15423 transitions. [2021-08-06 15:35:03,668 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 15423 transitions. Word has length 28 [2021-08-06 15:35:03,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:03,668 INFO L470 AbstractCegarLoop]: Abstraction has 4263 states and 15423 transitions. [2021-08-06 15:35:03,668 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) [2021-08-06 15:35:03,668 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 15423 transitions. [2021-08-06 15:35:03,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:35:03,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:03,675 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] [2021-08-06 15:35:03,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:03,891 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 [2021-08-06 15:35:03,892 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:03,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:03,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2084117998, now seen corresponding path program 76 times [2021-08-06 15:35:03,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:03,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653287867] [2021-08-06 15:35:03,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:03,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:04,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:04,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653287867] [2021-08-06 15:35:04,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653287867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:04,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64404793] [2021-08-06 15:35:04,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:35:04,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:04,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:04,102 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) [2021-08-06 15:35:04,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-06 15:35:10,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:35:10,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:10,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:35:10,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:10,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64404793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:10,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:10,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-06 15:35:10,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532765426] [2021-08-06 15:35:10,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:35:10,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:10,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:35:10,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:35:10,927 INFO L87 Difference]: Start difference. First operand 4263 states and 15423 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:11,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:11,587 INFO L93 Difference]: Finished difference Result 9151 states and 30329 transitions. [2021-08-06 15:35:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 15:35:11,588 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:35:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:11,607 INFO L225 Difference]: With dead ends: 9151 [2021-08-06 15:35:11,607 INFO L226 Difference]: Without dead ends: 9151 [2021-08-06 15:35:11,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 495.0ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 15:35:11,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9151 states. [2021-08-06 15:35:11,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9151 to 4389. [2021-08-06 15:35:11,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4389 states, 4388 states have (on average 3.605742935278031) internal successors, (15822), 4388 states have internal predecessors, (15822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:11,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4389 states to 4389 states and 15822 transitions. [2021-08-06 15:35:11,723 INFO L78 Accepts]: Start accepts. Automaton has 4389 states and 15822 transitions. Word has length 28 [2021-08-06 15:35:11,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:11,723 INFO L470 AbstractCegarLoop]: Abstraction has 4389 states and 15822 transitions. [2021-08-06 15:35:11,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:11,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4389 states and 15822 transitions. [2021-08-06 15:35:11,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:35:11,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:11,730 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] [2021-08-06 15:35:11,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2021-08-06 15:35:11,956 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 [2021-08-06 15:35:11,957 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:11,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:11,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1001095342, now seen corresponding path program 77 times [2021-08-06 15:35:11,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:11,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844558507] [2021-08-06 15:35:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:11,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:12,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:12,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844558507] [2021-08-06 15:35:12,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844558507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:12,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446319035] [2021-08-06 15:35:12,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:35:12,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:12,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:12,021 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) [2021-08-06 15:35:12,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-06 15:35:18,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:35:18,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:18,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:35:18,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:18,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446319035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:18,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:18,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:35:18,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613021316] [2021-08-06 15:35:18,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:35:18,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:18,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:35:18,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:35:18,778 INFO L87 Difference]: Start difference. First operand 4389 states and 15822 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) [2021-08-06 15:35:19,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:19,074 INFO L93 Difference]: Finished difference Result 5965 states and 20406 transitions. [2021-08-06 15:35:19,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:35:19,074 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 [2021-08-06 15:35:19,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:19,085 INFO L225 Difference]: With dead ends: 5965 [2021-08-06 15:35:19,085 INFO L226 Difference]: Without dead ends: 5935 [2021-08-06 15:35:19,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:35:19,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5935 states. [2021-08-06 15:35:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5935 to 4643. [2021-08-06 15:35:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 3.627531236535976) internal successors, (16839), 4642 states have internal predecessors, (16839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 16839 transitions. [2021-08-06 15:35:19,173 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 16839 transitions. Word has length 28 [2021-08-06 15:35:19,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:19,173 INFO L470 AbstractCegarLoop]: Abstraction has 4643 states and 16839 transitions. [2021-08-06 15:35:19,173 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) [2021-08-06 15:35:19,173 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 16839 transitions. [2021-08-06 15:35:19,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:35:19,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:19,181 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] [2021-08-06 15:35:19,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-08-06 15:35:19,388 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 [2021-08-06 15:35:19,388 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:19,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:19,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1822793836, now seen corresponding path program 78 times [2021-08-06 15:35:19,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:19,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703083720] [2021-08-06 15:35:19,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:19,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:35:19,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:19,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703083720] [2021-08-06 15:35:19,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703083720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:19,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907821191] [2021-08-06 15:35:19,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:35:19,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:19,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:19,451 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) [2021-08-06 15:35:19,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-06 15:35:25,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:35:25,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:25,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:35:25,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:35:26,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907821191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:26,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:26,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:35:26,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697345697] [2021-08-06 15:35:26,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:35:26,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:26,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:35:26,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:35:26,020 INFO L87 Difference]: Start difference. First operand 4643 states and 16839 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) [2021-08-06 15:35:26,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:26,330 INFO L93 Difference]: Finished difference Result 6205 states and 21211 transitions. [2021-08-06 15:35:26,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:35:26,331 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 [2021-08-06 15:35:26,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:26,342 INFO L225 Difference]: With dead ends: 6205 [2021-08-06 15:35:26,342 INFO L226 Difference]: Without dead ends: 6205 [2021-08-06 15:35:26,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:35:26,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6205 states. [2021-08-06 15:35:26,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6205 to 4638. [2021-08-06 15:35:26,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4637 states have (on average 3.6236791028682336) internal successors, (16803), 4637 states have internal predecessors, (16803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 16803 transitions. [2021-08-06 15:35:26,431 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 16803 transitions. Word has length 28 [2021-08-06 15:35:26,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:26,432 INFO L470 AbstractCegarLoop]: Abstraction has 4638 states and 16803 transitions. [2021-08-06 15:35:26,432 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) [2021-08-06 15:35:26,432 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 16803 transitions. [2021-08-06 15:35:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:35:26,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:26,438 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] [2021-08-06 15:35:26,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:26,647 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 [2021-08-06 15:35:26,647 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:26,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:26,648 INFO L82 PathProgramCache]: Analyzing trace with hash 2039296856, now seen corresponding path program 79 times [2021-08-06 15:35:26,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:26,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141832597] [2021-08-06 15:35:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:26,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:35:26,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:26,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141832597] [2021-08-06 15:35:26,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141832597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:26,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150915157] [2021-08-06 15:35:26,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:35:26,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:26,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:26,821 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) [2021-08-06 15:35:26,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-06 15:35:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:33,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:35:33,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:35:33,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150915157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:33,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:33,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-06 15:35:33,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651749109] [2021-08-06 15:35:33,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:35:33,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:33,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:35:33,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:35:33,429 INFO L87 Difference]: Start difference. First operand 4638 states and 16803 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:34,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:34,024 INFO L93 Difference]: Finished difference Result 9134 states and 30763 transitions. [2021-08-06 15:35:34,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 15:35:34,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:35:34,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:34,043 INFO L225 Difference]: With dead ends: 9134 [2021-08-06 15:35:34,043 INFO L226 Difference]: Without dead ends: 9130 [2021-08-06 15:35:34,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 309.8ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:35:34,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9130 states. [2021-08-06 15:35:34,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9130 to 4594. [2021-08-06 15:35:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4594 states, 4593 states have (on average 3.6231221423905944) internal successors, (16641), 4593 states have internal predecessors, (16641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:34,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4594 states to 4594 states and 16641 transitions. [2021-08-06 15:35:34,158 INFO L78 Accepts]: Start accepts. Automaton has 4594 states and 16641 transitions. Word has length 28 [2021-08-06 15:35:34,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:34,158 INFO L470 AbstractCegarLoop]: Abstraction has 4594 states and 16641 transitions. [2021-08-06 15:35:34,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:34,158 INFO L276 IsEmpty]: Start isEmpty. Operand 4594 states and 16641 transitions. [2021-08-06 15:35:34,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:35:34,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:34,165 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] [2021-08-06 15:35:34,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:34,381 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 [2021-08-06 15:35:34,381 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:34,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:34,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1143476040, now seen corresponding path program 80 times [2021-08-06 15:35:34,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:34,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676912254] [2021-08-06 15:35:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:34,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:34,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:34,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676912254] [2021-08-06 15:35:34,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676912254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:34,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497677687] [2021-08-06 15:35:34,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:35:34,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:34,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:34,541 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) [2021-08-06 15:35:34,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-06 15:35:40,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:35:40,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:40,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:35:40,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:41,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497677687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:41,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:41,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 15:35:41,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379216294] [2021-08-06 15:35:41,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:35:41,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:41,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:35:41,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:35:41,005 INFO L87 Difference]: Start difference. First operand 4594 states and 16641 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) [2021-08-06 15:35:41,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:41,435 INFO L93 Difference]: Finished difference Result 6293 states and 21563 transitions. [2021-08-06 15:35:41,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:35:41,435 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 [2021-08-06 15:35:41,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:41,448 INFO L225 Difference]: With dead ends: 6293 [2021-08-06 15:35:41,448 INFO L226 Difference]: Without dead ends: 6293 [2021-08-06 15:35:41,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:35:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6293 states. [2021-08-06 15:35:41,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6293 to 4506. [2021-08-06 15:35:41,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4505 states have (on average 3.6250832408435074) internal successors, (16331), 4505 states have internal predecessors, (16331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 16331 transitions. [2021-08-06 15:35:41,593 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 16331 transitions. Word has length 28 [2021-08-06 15:35:41,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:41,593 INFO L470 AbstractCegarLoop]: Abstraction has 4506 states and 16331 transitions. [2021-08-06 15:35:41,593 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) [2021-08-06 15:35:41,593 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 16331 transitions. [2021-08-06 15:35:41,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:35:41,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:41,600 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] [2021-08-06 15:35:41,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:41,816 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 [2021-08-06 15:35:41,817 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:41,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:41,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1658333782, now seen corresponding path program 81 times [2021-08-06 15:35:41,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:41,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269776241] [2021-08-06 15:35:41,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:41,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:41,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:41,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269776241] [2021-08-06 15:35:41,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269776241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:41,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371978151] [2021-08-06 15:35:41,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:35:41,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:41,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:41,901 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) [2021-08-06 15:35:41,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-06 15:35:48,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:35:48,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:48,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:35:48,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:48,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371978151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:48,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:48,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 15:35:48,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068647768] [2021-08-06 15:35:48,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:35:48,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:48,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:35:48,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:35:48,615 INFO L87 Difference]: Start difference. First operand 4506 states and 16331 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) [2021-08-06 15:35:49,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:49,282 INFO L93 Difference]: Finished difference Result 9023 states and 30384 transitions. [2021-08-06 15:35:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 15:35:49,282 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 [2021-08-06 15:35:49,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:49,300 INFO L225 Difference]: With dead ends: 9023 [2021-08-06 15:35:49,301 INFO L226 Difference]: Without dead ends: 9011 [2021-08-06 15:35:49,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:35:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9011 states. [2021-08-06 15:35:49,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9011 to 4506. [2021-08-06 15:35:49,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4505 states have (on average 3.621531631520533) internal successors, (16315), 4505 states have internal predecessors, (16315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 16315 transitions. [2021-08-06 15:35:49,421 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 16315 transitions. Word has length 28 [2021-08-06 15:35:49,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:49,421 INFO L470 AbstractCegarLoop]: Abstraction has 4506 states and 16315 transitions. [2021-08-06 15:35:49,421 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) [2021-08-06 15:35:49,421 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 16315 transitions. [2021-08-06 15:35:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:35:49,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:49,429 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] [2021-08-06 15:35:49,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:49,644 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 [2021-08-06 15:35:49,644 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:49,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:49,644 INFO L82 PathProgramCache]: Analyzing trace with hash 868352598, now seen corresponding path program 82 times [2021-08-06 15:35:49,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:49,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950659730] [2021-08-06 15:35:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:49,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:49,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:49,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950659730] [2021-08-06 15:35:49,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950659730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:49,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406968758] [2021-08-06 15:35:49,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:35:49,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:49,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:49,722 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) [2021-08-06 15:35:49,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-06 15:35:56,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:35:56,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:56,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:35:56,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:56,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406968758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:56,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:56,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-06 15:35:56,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864364833] [2021-08-06 15:35:56,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:35:56,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:56,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:35:56,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:35:56,511 INFO L87 Difference]: Start difference. First operand 4506 states and 16315 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) [2021-08-06 15:35:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:57,609 INFO L93 Difference]: Finished difference Result 13416 states and 44346 transitions. [2021-08-06 15:35:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-06 15:35:57,610 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 [2021-08-06 15:35:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:57,676 INFO L225 Difference]: With dead ends: 13416 [2021-08-06 15:35:57,676 INFO L226 Difference]: Without dead ends: 13416 [2021-08-06 15:35:57,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 641.9ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-08-06 15:35:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13416 states. [2021-08-06 15:35:57,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13416 to 5657. [2021-08-06 15:35:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5657 states, 5656 states have (on average 3.6842291371994342) internal successors, (20838), 5656 states have internal predecessors, (20838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:57,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5657 states to 5657 states and 20838 transitions. [2021-08-06 15:35:57,886 INFO L78 Accepts]: Start accepts. Automaton has 5657 states and 20838 transitions. Word has length 28 [2021-08-06 15:35:57,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:57,886 INFO L470 AbstractCegarLoop]: Abstraction has 5657 states and 20838 transitions. [2021-08-06 15:35:57,886 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) [2021-08-06 15:35:57,887 INFO L276 IsEmpty]: Start isEmpty. Operand 5657 states and 20838 transitions. [2021-08-06 15:35:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:35:57,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:57,896 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] [2021-08-06 15:35:57,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:58,112 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 [2021-08-06 15:35:58,112 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:58,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:58,112 INFO L82 PathProgramCache]: Analyzing trace with hash 949728686, now seen corresponding path program 83 times [2021-08-06 15:35:58,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:58,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621244075] [2021-08-06 15:35:58,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:58,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:58,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:58,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621244075] [2021-08-06 15:35:58,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621244075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:58,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375339687] [2021-08-06 15:35:58,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:35:58,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:58,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:58,182 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) [2021-08-06 15:35:58,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-06 15:36:04,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:36:04,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:04,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:36:04,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:04,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375339687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:04,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:04,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-06 15:36:04,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230183596] [2021-08-06 15:36:04,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:36:04,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:04,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:36:04,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:36:04,827 INFO L87 Difference]: Start difference. First operand 5657 states and 20838 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) [2021-08-06 15:36:05,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:05,701 INFO L93 Difference]: Finished difference Result 12806 states and 42760 transitions. [2021-08-06 15:36:05,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-06 15:36:05,701 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 [2021-08-06 15:36:05,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:05,728 INFO L225 Difference]: With dead ends: 12806 [2021-08-06 15:36:05,728 INFO L226 Difference]: Without dead ends: 12794 [2021-08-06 15:36:05,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 501.9ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-08-06 15:36:05,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12794 states. [2021-08-06 15:36:05,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12794 to 5533. [2021-08-06 15:36:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5533 states, 5532 states have (on average 3.688720173535792) internal successors, (20406), 5532 states have internal predecessors, (20406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:05,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5533 states to 5533 states and 20406 transitions. [2021-08-06 15:36:05,894 INFO L78 Accepts]: Start accepts. Automaton has 5533 states and 20406 transitions. Word has length 28 [2021-08-06 15:36:05,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:05,894 INFO L470 AbstractCegarLoop]: Abstraction has 5533 states and 20406 transitions. [2021-08-06 15:36:05,894 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) [2021-08-06 15:36:05,894 INFO L276 IsEmpty]: Start isEmpty. Operand 5533 states and 20406 transitions. [2021-08-06 15:36:05,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:36:05,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:05,903 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] [2021-08-06 15:36:05,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:06,128 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 [2021-08-06 15:36:06,129 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:06,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:06,129 INFO L82 PathProgramCache]: Analyzing trace with hash -565363286, now seen corresponding path program 84 times [2021-08-06 15:36:06,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:06,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128246126] [2021-08-06 15:36:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:06,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:06,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:06,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128246126] [2021-08-06 15:36:06,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128246126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:06,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849583226] [2021-08-06 15:36:06,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:36:06,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:06,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:06,201 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) [2021-08-06 15:36:06,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-06 15:36:12,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:36:12,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:12,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:36:12,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:12,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849583226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:12,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:12,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-06 15:36:12,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030834763] [2021-08-06 15:36:12,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:36:12,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:12,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:36:12,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:36:12,949 INFO L87 Difference]: Start difference. First operand 5533 states and 20406 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) [2021-08-06 15:36:13,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:13,917 INFO L93 Difference]: Finished difference Result 12371 states and 41370 transitions. [2021-08-06 15:36:13,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-06 15:36:13,918 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 [2021-08-06 15:36:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:13,946 INFO L225 Difference]: With dead ends: 12371 [2021-08-06 15:36:13,946 INFO L226 Difference]: Without dead ends: 12335 [2021-08-06 15:36:13,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 531.9ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 15:36:13,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12335 states. [2021-08-06 15:36:14,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12335 to 5551. [2021-08-06 15:36:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5551 states, 5550 states have (on average 3.6848648648648648) internal successors, (20451), 5550 states have internal predecessors, (20451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:14,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5551 states to 5551 states and 20451 transitions. [2021-08-06 15:36:14,103 INFO L78 Accepts]: Start accepts. Automaton has 5551 states and 20451 transitions. Word has length 28 [2021-08-06 15:36:14,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:14,103 INFO L470 AbstractCegarLoop]: Abstraction has 5551 states and 20451 transitions. [2021-08-06 15:36:14,103 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) [2021-08-06 15:36:14,104 INFO L276 IsEmpty]: Start isEmpty. Operand 5551 states and 20451 transitions. [2021-08-06 15:36:14,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:36:14,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:14,111 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] [2021-08-06 15:36:14,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-08-06 15:36:14,336 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 [2021-08-06 15:36:14,337 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:14,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1031763430, now seen corresponding path program 85 times [2021-08-06 15:36:14,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:14,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902308579] [2021-08-06 15:36:14,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:14,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:14,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:14,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902308579] [2021-08-06 15:36:14,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902308579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:14,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535904295] [2021-08-06 15:36:14,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:36:14,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:14,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:14,426 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) [2021-08-06 15:36:14,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-06 15:36:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:20,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:36:20,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:21,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535904295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:21,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:21,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 15:36:21,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817994470] [2021-08-06 15:36:21,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:36:21,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:21,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:36:21,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:36:21,147 INFO L87 Difference]: Start difference. First operand 5551 states and 20451 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-08-06 15:36:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:22,411 INFO L93 Difference]: Finished difference Result 12553 states and 42018 transitions. [2021-08-06 15:36:22,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-06 15:36:22,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 [2021-08-06 15:36:22,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:22,438 INFO L225 Difference]: With dead ends: 12553 [2021-08-06 15:36:22,438 INFO L226 Difference]: Without dead ends: 12553 [2021-08-06 15:36:22,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 828.8ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-08-06 15:36:22,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12553 states. [2021-08-06 15:36:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12553 to 5747. [2021-08-06 15:36:22,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5747 states, 5746 states have (on average 3.6722937695788374) internal successors, (21101), 5746 states have internal predecessors, (21101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:22,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5747 states to 5747 states and 21101 transitions. [2021-08-06 15:36:22,641 INFO L78 Accepts]: Start accepts. Automaton has 5747 states and 21101 transitions. Word has length 28 [2021-08-06 15:36:22,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:22,641 INFO L470 AbstractCegarLoop]: Abstraction has 5747 states and 21101 transitions. [2021-08-06 15:36:22,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-08-06 15:36:22,641 INFO L276 IsEmpty]: Start isEmpty. Operand 5747 states and 21101 transitions. [2021-08-06 15:36:22,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:36:22,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:22,650 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] [2021-08-06 15:36:22,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2021-08-06 15:36:22,852 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 [2021-08-06 15:36:22,852 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:22,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:22,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1620164712, now seen corresponding path program 86 times [2021-08-06 15:36:22,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:22,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829035599] [2021-08-06 15:36:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:22,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:22,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:22,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829035599] [2021-08-06 15:36:22,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829035599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:22,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407892378] [2021-08-06 15:36:22,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:36:22,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:22,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:22,921 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) [2021-08-06 15:36:22,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-06 15:36:29,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:36:29,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:29,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:36:29,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:29,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407892378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:29,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:29,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 15:36:29,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253404599] [2021-08-06 15:36:29,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:36:29,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:29,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:36:29,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:36:29,674 INFO L87 Difference]: Start difference. First operand 5747 states and 21101 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-08-06 15:36:30,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:30,687 INFO L93 Difference]: Finished difference Result 12170 states and 40965 transitions. [2021-08-06 15:36:30,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 15:36:30,687 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 [2021-08-06 15:36:30,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:30,713 INFO L225 Difference]: With dead ends: 12170 [2021-08-06 15:36:30,713 INFO L226 Difference]: Without dead ends: 12158 [2021-08-06 15:36:30,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 586.7ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-08-06 15:36:30,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12158 states. [2021-08-06 15:36:30,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12158 to 5616. [2021-08-06 15:36:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5616 states, 5615 states have (on average 3.675512021371327) internal successors, (20638), 5615 states have internal predecessors, (20638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:30,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5616 states to 5616 states and 20638 transitions. [2021-08-06 15:36:30,904 INFO L78 Accepts]: Start accepts. Automaton has 5616 states and 20638 transitions. Word has length 28 [2021-08-06 15:36:30,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:30,904 INFO L470 AbstractCegarLoop]: Abstraction has 5616 states and 20638 transitions. [2021-08-06 15:36:30,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-08-06 15:36:30,904 INFO L276 IsEmpty]: Start isEmpty. Operand 5616 states and 20638 transitions. [2021-08-06 15:36:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:36:30,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:30,913 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] [2021-08-06 15:36:30,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:31,129 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 [2021-08-06 15:36:31,129 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:31,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:31,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1407345406, now seen corresponding path program 87 times [2021-08-06 15:36:31,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:31,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780305980] [2021-08-06 15:36:31,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:31,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:31,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:31,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780305980] [2021-08-06 15:36:31,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780305980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:31,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734495424] [2021-08-06 15:36:31,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:36:31,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:31,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:31,189 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) [2021-08-06 15:36:31,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-06 15:36:37,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:36:37,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:37,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 15:36:37,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:38,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734495424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:38,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:38,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 15:36:38,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23968707] [2021-08-06 15:36:38,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:36:38,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:38,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:36:38,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:36:38,078 INFO L87 Difference]: Start difference. First operand 5616 states and 20638 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) [2021-08-06 15:36:39,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:39,095 INFO L93 Difference]: Finished difference Result 11395 states and 38810 transitions. [2021-08-06 15:36:39,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-06 15:36:39,096 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 [2021-08-06 15:36:39,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:39,119 INFO L225 Difference]: With dead ends: 11395 [2021-08-06 15:36:39,119 INFO L226 Difference]: Without dead ends: 11359 [2021-08-06 15:36:39,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 568.1ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 15:36:39,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11359 states. [2021-08-06 15:36:39,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11359 to 5640. [2021-08-06 15:36:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5640 states, 5639 states have (on average 3.6740556836318494) internal successors, (20718), 5639 states have internal predecessors, (20718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 20718 transitions. [2021-08-06 15:36:39,331 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 20718 transitions. Word has length 28 [2021-08-06 15:36:39,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:39,332 INFO L470 AbstractCegarLoop]: Abstraction has 5640 states and 20718 transitions. [2021-08-06 15:36:39,332 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) [2021-08-06 15:36:39,332 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 20718 transitions. [2021-08-06 15:36:39,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:36:39,341 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:39,342 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] [2021-08-06 15:36:39,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:39,542 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 [2021-08-06 15:36:39,542 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:39,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:39,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1411508014, now seen corresponding path program 88 times [2021-08-06 15:36:39,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:39,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245911098] [2021-08-06 15:36:39,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:39,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:36:39,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:39,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245911098] [2021-08-06 15:36:39,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245911098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:39,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764240201] [2021-08-06 15:36:39,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:36:39,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:39,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:39,711 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:39,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 15:36:44,660 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 [2021-08-06 15:36:44,669 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 15:36:45,699 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 15:36:45,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:45,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:45,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-06 15:36:45,899 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 3,while executing Executor. [2021-08-06 15:36:45,901 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 15:36:45,901 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 15:36:45,901 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 15:36:45,914 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 15:36:45,914 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 15:36:45,915 INFO L202 PluginConnector]: Adding new model max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 03:36:45 BasicIcfg [2021-08-06 15:36:45,915 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 15:36:45,916 INFO L168 Benchmark]: Toolchain (without parser) took 886734.57 ms. Allocated memory was 177.2 MB in the beginning and 3.6 GB in the end (delta: 3.4 GB). Free memory was 157.7 MB in the beginning and 434.4 MB in the end (delta: -276.7 MB). Peak memory consumption was 3.3 GB. Max. memory is 8.0 GB. [2021-08-06 15:36:45,916 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 177.2 MB. Free memory is still 158.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:36:45,916 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.04 ms. Allocated memory is still 177.2 MB. Free memory was 157.6 MB in the beginning and 156.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 15:36:45,916 INFO L168 Benchmark]: Boogie Preprocessor took 16.46 ms. Allocated memory is still 177.2 MB. Free memory was 156.2 MB in the beginning and 155.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:36:45,916 INFO L168 Benchmark]: RCFGBuilder took 191.82 ms. Allocated memory is still 177.2 MB. Free memory was 155.1 MB in the beginning and 142.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-06 15:36:45,916 INFO L168 Benchmark]: TraceAbstraction took 886502.84 ms. Allocated memory was 177.2 MB in the beginning and 3.6 GB in the end (delta: 3.4 GB). Free memory was 141.7 MB in the beginning and 434.4 MB in the end (delta: -292.7 MB). Peak memory consumption was 3.3 GB. Max. memory is 8.0 GB. [2021-08-06 15:36:45,916 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 0.10 ms. Allocated memory is still 177.2 MB. Free memory is still 158.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.04 ms. Allocated memory is still 177.2 MB. Free memory was 157.6 MB in the beginning and 156.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.46 ms. Allocated memory is still 177.2 MB. Free memory was 156.2 MB in the beginning and 155.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 191.82 ms. Allocated memory is still 177.2 MB. Free memory was 155.1 MB in the beginning and 142.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 886502.84 ms. Allocated memory was 177.2 MB in the beginning and 3.6 GB in the end (delta: 3.4 GB). Free memory was 141.7 MB in the beginning and 434.4 MB in the end (delta: -292.7 MB). Peak memory consumption was 3.3 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 29 with TraceHistMax 3,while executing Executor. - 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 29 with TraceHistMax 3,while executing Executor. - 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 29 with TraceHistMax 3,while executing Executor. - 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 29 with TraceHistMax 3,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 886445.9ms, OverallIterations: 159, TraceHistogramMax: 3, EmptinessCheckTime: 543.4ms, AutomataDifference: 159200.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7148 SDtfs, 39263 SDslu, 52249 SDs, 0 SdLazy, 88565 SolverSat, 7111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 43132.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9541 GetRequests, 3166 SyntacticMatches, 125 SemanticMatches, 6250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94806 ImplicationChecksByTransitivity, 127982.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5747occurred in iteration=156, InterpolantAutomatonStates: 5332, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7660.1ms AutomataMinimizationTime, 158 MinimizatonAttempts, 265132 StatesRemovedByMinimization, 158 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 564.7ms SsaConstructionTime, 2760.0ms SatisfiabilityAnalysisTime, 140486.0ms InterpolantComputationTime, 8134 NumberOfCodeBlocks, 8129 NumberOfCodeBlocksAsserted, 522 NumberOfCheckSat, 7821 ConstructedInterpolants, 88 QuantifiedInterpolants, 119327 SizeOfPredicates, 672 NumberOfNonLiveVariables, 10240 ConjunctsInSsa, 2469 ConjunctsInUnsatCore, 313 InterpolantComputations, 3 PerfectInterpolantSequences, 412/2282 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