/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 19:41:56,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 19:41:56,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 19:41:56,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 19:41:56,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 19:41:56,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 19:41:56,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 19:41:56,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 19:41:56,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 19:41:56,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 19:41:56,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 19:41:56,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-06 19:41:56,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 19:41:56,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 19:41:56,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 19:41:56,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 19:41:56,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 19:41:56,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 19:41:56,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 19:41:56,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 19:41:56,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 19:41:56,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 19:41:56,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 19:41:56,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 19:41:56,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-06 19:41:56,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-06 19:41:56,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-06 19:41:56,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-06 19:41:56,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-06 19:41:56,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-06 19:41:56,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-06 19:41:56,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-06 19:41:56,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-06 19:41:56,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-06 19:41:56,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-06 19:41:56,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-06 19:41:56,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-06 19:41:56,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-06 19:41:56,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 19:41:56,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 19:41:56,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 19:41:56,096 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-06 19:41:56,124 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 19:41:56,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 19:41:56,127 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 19:41:56,127 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 19:41:56,127 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 19:41:56,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 19:41:56,127 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 19:41:56,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 19:41:56,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 19:41:56,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 19:41:56,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 19:41:56,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 19:41:56,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 19:41:56,128 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 19:41:56,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 19:41:56,128 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 19:41:56,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 19:41:56,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 19:41:56,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 19:41:56,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 19:41:56,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 19:41:56,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:41:56,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 19:41:56,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 19:41:56,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 19:41:56,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 19:41:56,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 19:41:56,130 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 19:41:56,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 19:41:56,130 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 19:41:56,130 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 19:41:56,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 19:41:56,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 19:41:56,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 19:41:56,385 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 19:41:56,385 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 19:41:56,386 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl [2021-08-06 19:41:56,386 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3.wvr.bpl' [2021-08-06 19:41:56,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 19:41:56,427 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 19:41:56,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 19:41:56,428 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 19:41:56,428 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 19:41:56,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:41:56" (1/1) ... [2021-08-06 19:41:56,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:41:56" (1/1) ... [2021-08-06 19:41:56,445 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 19:41:56,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 19:41:56,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 19:41:56,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 19:41:56,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:41:56" (1/1) ... [2021-08-06 19:41:56,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:41:56" (1/1) ... [2021-08-06 19:41:56,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:41:56" (1/1) ... [2021-08-06 19:41:56,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:41:56" (1/1) ... [2021-08-06 19:41:56,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:41:56" (1/1) ... [2021-08-06 19:41:56,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:41:56" (1/1) ... [2021-08-06 19:41:56,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:41:56" (1/1) ... [2021-08-06 19:41:56,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 19:41:56,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 19:41:56,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 19:41:56,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 19:41:56,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:41:56" (1/1) ... [2021-08-06 19:41:56,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:41:56,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:56,481 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 19:41:56,490 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 19:41:56,512 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 19:41:56,512 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 19:41:56,512 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 19:41:56,512 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 19:41:56,512 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 19:41:56,512 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 19:41:56,513 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 19:41:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 19:41:56,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 19:41:56,513 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 19:41:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 19:41:56,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 19:41:56,513 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-06 19:41:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-06 19:41:56,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-06 19:41:56,513 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-08-06 19:41:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-08-06 19:41:56,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-08-06 19:41:56,513 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-08-06 19:41:56,514 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-08-06 19:41:56,514 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-08-06 19:41:56,515 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 19:41:56,640 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 19:41:56,640 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 19:41:56,641 INFO L202 PluginConnector]: Adding new model exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:41:56 BoogieIcfgContainer [2021-08-06 19:41:56,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 19:41:56,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 19:41:56,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 19:41:56,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 19:41:56,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:41:56" (1/2) ... [2021-08-06 19:41:56,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ddab21d and model type exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 07:41:56, skipping insertion in model container [2021-08-06 19:41:56,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:41:56" (2/2) ... [2021-08-06 19:41:56,646 INFO L111 eAbstractionObserver]: Analyzing ICFG exp3x3.wvr.bpl [2021-08-06 19:41:56,649 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 19:41:56,649 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 19:41:56,649 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 19:41:56,650 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 19:41:56,711 INFO L148 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-08-06 19:41:56,737 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 19:41:56,741 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 19:41:56,742 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-06 19:41:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 6829 states, 4696 states have (on average 1.8411413969335604) internal successors, (8646), 6828 states have internal predecessors, (8646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:57,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 19:41:57,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:57,249 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, 1, 1, 1] [2021-08-06 19:41:57,250 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:41:57,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:57,257 INFO L82 PathProgramCache]: Analyzing trace with hash -835572567, now seen corresponding path program 1 times [2021-08-06 19:41:57,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:57,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849759015] [2021-08-06 19:41:57,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:57,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:57,475 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 19:41:57,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:57,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849759015] [2021-08-06 19:41:57,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849759015] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:41:57,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:41:57,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 19:41:57,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545961843] [2021-08-06 19:41:57,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:41:57,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:57,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:41:57,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:41:57,499 INFO L87 Difference]: Start difference. First operand has 6829 states, 4696 states have (on average 1.8411413969335604) internal successors, (8646), 6828 states have internal predecessors, (8646), 0 states have call successors, (0), 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 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:57,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:57,665 INFO L93 Difference]: Finished difference Result 13654 states and 17288 transitions. [2021-08-06 19:41:57,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:41:57,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 19:41:57,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:57,686 INFO L225 Difference]: With dead ends: 13654 [2021-08-06 19:41:57,686 INFO L226 Difference]: Without dead ends: 512 [2021-08-06 19:41:57,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:41:57,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-08-06 19:41:57,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 278. [2021-08-06 19:41:57,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.0252707581227436) internal successors, (561), 277 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:57,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 561 transitions. [2021-08-06 19:41:57,750 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 561 transitions. Word has length 27 [2021-08-06 19:41:57,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:57,751 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 561 transitions. [2021-08-06 19:41:57,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:57,751 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 561 transitions. [2021-08-06 19:41:57,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:41:57,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:57,753 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, 1, 1, 1, 1, 1] [2021-08-06 19:41:57,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 19:41:57,754 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:41:57,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:57,757 INFO L82 PathProgramCache]: Analyzing trace with hash -493921305, now seen corresponding path program 1 times [2021-08-06 19:41:57,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:57,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418502561] [2021-08-06 19:41:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:57,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:57,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:57,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418502561] [2021-08-06 19:41:57,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418502561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:57,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728418796] [2021-08-06 19:41:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:57,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:57,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:57,896 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 19:41:57,909 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 19:41:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:57,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 19:41:57,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:58,052 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:41:58,053 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:41:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:58,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728418796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:58,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:58,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-06 19:41:58,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048787024] [2021-08-06 19:41:58,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:41:58,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:58,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:41:58,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:41:58,154 INFO L87 Difference]: Start difference. First operand 278 states and 561 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 19:41:58,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:58,232 INFO L93 Difference]: Finished difference Result 662 states and 1303 transitions. [2021-08-06 19:41:58,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:41:58,233 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 29 [2021-08-06 19:41:58,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:58,236 INFO L225 Difference]: With dead ends: 662 [2021-08-06 19:41:58,236 INFO L226 Difference]: Without dead ends: 662 [2021-08-06 19:41:58,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:41:58,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-08-06 19:41:58,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 402. [2021-08-06 19:41:58,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0374064837905235) internal successors, (817), 401 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 817 transitions. [2021-08-06 19:41:58,251 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 817 transitions. Word has length 29 [2021-08-06 19:41:58,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:58,251 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 817 transitions. [2021-08-06 19:41:58,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 19:41:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 817 transitions. [2021-08-06 19:41:58,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:41:58,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:58,253 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, 1, 1, 1, 1, 1] [2021-08-06 19:41:58,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:58,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:58,470 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:41:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:58,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1349063189, now seen corresponding path program 1 times [2021-08-06 19:41:58,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:58,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453804849] [2021-08-06 19:41:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:58,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:58,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:58,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453804849] [2021-08-06 19:41:58,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453804849] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:41:58,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:41:58,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 19:41:58,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866592947] [2021-08-06 19:41:58,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:41:58,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:41:58,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:41:58,512 INFO L87 Difference]: Start difference. First operand 402 states and 817 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:58,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:58,559 INFO L93 Difference]: Finished difference Result 826 states and 1611 transitions. [2021-08-06 19:41:58,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:41:58,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:41:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:58,562 INFO L225 Difference]: With dead ends: 826 [2021-08-06 19:41:58,562 INFO L226 Difference]: Without dead ends: 826 [2021-08-06 19:41:58,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:41:58,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-08-06 19:41:58,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 464. [2021-08-06 19:41:58,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.0302375809935205) internal successors, (940), 463 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:58,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 940 transitions. [2021-08-06 19:41:58,573 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 940 transitions. Word has length 29 [2021-08-06 19:41:58,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:58,573 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 940 transitions. [2021-08-06 19:41:58,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:58,573 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 940 transitions. [2021-08-06 19:41:58,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:41:58,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:58,574 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, 1, 1, 1, 1, 1] [2021-08-06 19:41:58,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 19:41:58,575 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:41:58,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:58,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1653278997, now seen corresponding path program 1 times [2021-08-06 19:41:58,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:58,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387583062] [2021-08-06 19:41:58,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:58,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:58,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:58,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387583062] [2021-08-06 19:41:58,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387583062] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:41:58,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:41:58,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 19:41:58,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921697320] [2021-08-06 19:41:58,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:41:58,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:58,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:41:58,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:41:58,610 INFO L87 Difference]: Start difference. First operand 464 states and 940 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:58,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:58,655 INFO L93 Difference]: Finished difference Result 1126 states and 2254 transitions. [2021-08-06 19:41:58,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:41:58,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:41:58,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:58,659 INFO L225 Difference]: With dead ends: 1126 [2021-08-06 19:41:58,659 INFO L226 Difference]: Without dead ends: 1126 [2021-08-06 19:41:58,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:41:58,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-08-06 19:41:58,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 756. [2021-08-06 19:41:58,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.1549668874172188) internal successors, (1627), 755 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:58,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1627 transitions. [2021-08-06 19:41:58,673 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1627 transitions. Word has length 29 [2021-08-06 19:41:58,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:58,673 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1627 transitions. [2021-08-06 19:41:58,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:58,673 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1627 transitions. [2021-08-06 19:41:58,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:41:58,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:58,675 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, 1, 1, 1, 1, 1] [2021-08-06 19:41:58,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 19:41:58,675 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:41:58,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:58,675 INFO L82 PathProgramCache]: Analyzing trace with hash 288049639, now seen corresponding path program 1 times [2021-08-06 19:41:58,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:58,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184028020] [2021-08-06 19:41:58,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:58,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:58,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:58,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184028020] [2021-08-06 19:41:58,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184028020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:58,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662322404] [2021-08-06 19:41:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:58,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:58,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:58,724 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 19:41:58,725 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 19:41:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:58,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 19:41:58,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:58,900 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:41:58,901 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:41:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:58,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662322404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:58,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:58,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-06 19:41:58,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759381223] [2021-08-06 19:41:58,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:41:58,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:58,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:41:58,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:41:58,937 INFO L87 Difference]: Start difference. First operand 756 states and 1627 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 19:41:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:58,999 INFO L93 Difference]: Finished difference Result 1648 states and 3728 transitions. [2021-08-06 19:41:58,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:41:59,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 29 [2021-08-06 19:41:59,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:59,005 INFO L225 Difference]: With dead ends: 1648 [2021-08-06 19:41:59,005 INFO L226 Difference]: Without dead ends: 1648 [2021-08-06 19:41:59,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:41:59,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-08-06 19:41:59,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1190. [2021-08-06 19:41:59,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 2.6400336417157275) internal successors, (3139), 1189 states have internal predecessors, (3139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:59,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3139 transitions. [2021-08-06 19:41:59,029 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3139 transitions. Word has length 29 [2021-08-06 19:41:59,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:59,029 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 3139 transitions. [2021-08-06 19:41:59,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 19:41:59,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3139 transitions. [2021-08-06 19:41:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:41:59,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:59,034 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, 1, 1, 1, 1, 1] [2021-08-06 19:41:59,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:59,252 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 19:41:59,253 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:41:59,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:59,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1249053205, now seen corresponding path program 2 times [2021-08-06 19:41:59,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:59,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904462223] [2021-08-06 19:41:59,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:59,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:59,284 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:41:59,286 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:41:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:59,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:59,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904462223] [2021-08-06 19:41:59,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904462223] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:41:59,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:41:59,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:41:59,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197587910] [2021-08-06 19:41:59,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:41:59,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:59,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:41:59,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:41:59,290 INFO L87 Difference]: Start difference. First operand 1190 states and 3139 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:59,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:59,324 INFO L93 Difference]: Finished difference Result 1684 states and 4339 transitions. [2021-08-06 19:41:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:41:59,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:41:59,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:59,332 INFO L225 Difference]: With dead ends: 1684 [2021-08-06 19:41:59,332 INFO L226 Difference]: Without dead ends: 1684 [2021-08-06 19:41:59,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:41:59,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-08-06 19:41:59,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1286. [2021-08-06 19:41:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 2.6295719844357976) internal successors, (3379), 1285 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 3379 transitions. [2021-08-06 19:41:59,358 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 3379 transitions. Word has length 29 [2021-08-06 19:41:59,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:59,359 INFO L470 AbstractCegarLoop]: Abstraction has 1286 states and 3379 transitions. [2021-08-06 19:41:59,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:59,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 3379 transitions. [2021-08-06 19:41:59,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:41:59,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:59,362 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, 1, 1, 1, 1, 1] [2021-08-06 19:41:59,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 19:41:59,363 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:41:59,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:59,363 INFO L82 PathProgramCache]: Analyzing trace with hash 173045739, now seen corresponding path program 1 times [2021-08-06 19:41:59,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:59,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662281752] [2021-08-06 19:41:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:59,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:59,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:59,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662281752] [2021-08-06 19:41:59,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662281752] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:41:59,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:41:59,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 19:41:59,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573320900] [2021-08-06 19:41:59,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:41:59,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:59,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:41:59,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:41:59,418 INFO L87 Difference]: Start difference. First operand 1286 states and 3379 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:59,460 INFO L93 Difference]: Finished difference Result 2076 states and 4762 transitions. [2021-08-06 19:41:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:41:59,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:41:59,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:59,468 INFO L225 Difference]: With dead ends: 2076 [2021-08-06 19:41:59,468 INFO L226 Difference]: Without dead ends: 2076 [2021-08-06 19:41:59,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:41:59,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-08-06 19:41:59,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1566. [2021-08-06 19:41:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 2.626198083067093) internal successors, (4110), 1565 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 4110 transitions. [2021-08-06 19:41:59,501 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 4110 transitions. Word has length 29 [2021-08-06 19:41:59,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:59,501 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 4110 transitions. [2021-08-06 19:41:59,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:59,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 4110 transitions. [2021-08-06 19:41:59,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:41:59,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:59,505 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:59,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 19:41:59,506 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:41:59,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:59,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1433637269, now seen corresponding path program 1 times [2021-08-06 19:41:59,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:59,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404390697] [2021-08-06 19:41:59,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:59,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:59,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:59,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404390697] [2021-08-06 19:41:59,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404390697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:59,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828807566] [2021-08-06 19:41:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:59,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:59,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:59,558 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 19:41:59,558 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 19:41:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:59,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 19:41:59,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:59,683 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:41:59,683 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:41:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:59,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828807566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:59,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:59,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-06 19:41:59,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543094413] [2021-08-06 19:41:59,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:41:59,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:59,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:41:59,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:41:59,724 INFO L87 Difference]: Start difference. First operand 1566 states and 4110 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 19:41:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:59,784 INFO L93 Difference]: Finished difference Result 2716 states and 6903 transitions. [2021-08-06 19:41:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:41:59,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 29 [2021-08-06 19:41:59,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:59,794 INFO L225 Difference]: With dead ends: 2716 [2021-08-06 19:41:59,794 INFO L226 Difference]: Without dead ends: 2716 [2021-08-06 19:41:59,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:41:59,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2716 states. [2021-08-06 19:41:59,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2716 to 1998. [2021-08-06 19:41:59,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1998 states, 1997 states have (on average 2.688532799198798) internal successors, (5369), 1997 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:59,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 5369 transitions. [2021-08-06 19:41:59,838 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 5369 transitions. Word has length 29 [2021-08-06 19:41:59,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:59,839 INFO L470 AbstractCegarLoop]: Abstraction has 1998 states and 5369 transitions. [2021-08-06 19:41:59,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 19:41:59,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 5369 transitions. [2021-08-06 19:41:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:41:59,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:59,843 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, 1, 1, 1, 1, 1] [2021-08-06 19:41:59,869 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 19:42:00,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:00,070 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:00,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2018206183, now seen corresponding path program 2 times [2021-08-06 19:42:00,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:00,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084246156] [2021-08-06 19:42:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:00,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:00,116 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:42:00,116 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:42:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:00,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:00,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084246156] [2021-08-06 19:42:00,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084246156] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:42:00,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:42:00,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:42:00,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686461983] [2021-08-06 19:42:00,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:42:00,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:00,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:42:00,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:42:00,120 INFO L87 Difference]: Start difference. First operand 1998 states and 5369 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:00,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:00,150 INFO L93 Difference]: Finished difference Result 2680 states and 6817 transitions. [2021-08-06 19:42:00,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:42:00,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:42:00,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:00,159 INFO L225 Difference]: With dead ends: 2680 [2021-08-06 19:42:00,160 INFO L226 Difference]: Without dead ends: 2680 [2021-08-06 19:42:00,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:42:00,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-08-06 19:42:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2016. [2021-08-06 19:42:00,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2015 states have (on average 2.6823821339950373) internal successors, (5405), 2015 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 5405 transitions. [2021-08-06 19:42:00,198 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 5405 transitions. Word has length 29 [2021-08-06 19:42:00,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:00,199 INFO L470 AbstractCegarLoop]: Abstraction has 2016 states and 5405 transitions. [2021-08-06 19:42:00,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 5405 transitions. [2021-08-06 19:42:00,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:42:00,203 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:00,204 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, 1, 1, 1, 1, 1] [2021-08-06 19:42:00,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-06 19:42:00,204 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:00,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:00,204 INFO L82 PathProgramCache]: Analyzing trace with hash -993814549, now seen corresponding path program 2 times [2021-08-06 19:42:00,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:00,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167212017] [2021-08-06 19:42:00,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:00,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:00,236 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:42:00,237 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:42:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:00,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:00,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167212017] [2021-08-06 19:42:00,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167212017] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:42:00,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:42:00,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:42:00,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091553825] [2021-08-06 19:42:00,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:42:00,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:00,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:42:00,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:42:00,241 INFO L87 Difference]: Start difference. First operand 2016 states and 5405 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:00,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:00,278 INFO L93 Difference]: Finished difference Result 2654 states and 6222 transitions. [2021-08-06 19:42:00,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:42:00,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:42:00,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:00,287 INFO L225 Difference]: With dead ends: 2654 [2021-08-06 19:42:00,288 INFO L226 Difference]: Without dead ends: 2652 [2021-08-06 19:42:00,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:42:00,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-08-06 19:42:00,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2018. [2021-08-06 19:42:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.6802181457610312) internal successors, (5406), 2017 states have internal predecessors, (5406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5406 transitions. [2021-08-06 19:42:00,334 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5406 transitions. Word has length 29 [2021-08-06 19:42:00,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:00,335 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 5406 transitions. [2021-08-06 19:42:00,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:00,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5406 transitions. [2021-08-06 19:42:00,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:42:00,340 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:00,340 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:00,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-06 19:42:00,340 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:00,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:00,341 INFO L82 PathProgramCache]: Analyzing trace with hash 560285097, now seen corresponding path program 1 times [2021-08-06 19:42:00,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:00,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403641049] [2021-08-06 19:42:00,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:00,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:00,410 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:42:00,412 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:42:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:42:00,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:00,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403641049] [2021-08-06 19:42:00,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403641049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:00,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821194875] [2021-08-06 19:42:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:00,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:00,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:00,423 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 19:42:00,424 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 19:42:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:00,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:42:00,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:01,066 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 79.1 percent of original size [2021-08-06 19:42:01,068 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 79.1 percent of original size [2021-08-06 19:42:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:01,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821194875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:01,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:01,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-08-06 19:42:01,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288393881] [2021-08-06 19:42:01,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:42:01,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:01,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:42:01,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:42:01,093 INFO L87 Difference]: Start difference. First operand 2018 states and 5406 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:01,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:01,181 INFO L93 Difference]: Finished difference Result 2800 states and 6878 transitions. [2021-08-06 19:42:01,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:42:01,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:42:01,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:01,191 INFO L225 Difference]: With dead ends: 2800 [2021-08-06 19:42:01,192 INFO L226 Difference]: Without dead ends: 2790 [2021-08-06 19:42:01,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:42:01,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2021-08-06 19:42:01,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2073. [2021-08-06 19:42:01,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 2072 states have (on average 2.7215250965250966) internal successors, (5639), 2072 states have internal predecessors, (5639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 5639 transitions. [2021-08-06 19:42:01,232 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 5639 transitions. Word has length 31 [2021-08-06 19:42:01,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:01,233 INFO L470 AbstractCegarLoop]: Abstraction has 2073 states and 5639 transitions. [2021-08-06 19:42:01,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:01,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 5639 transitions. [2021-08-06 19:42:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:42:01,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:01,237 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:01,258 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 19:42:01,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:01,453 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:01,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:01,453 INFO L82 PathProgramCache]: Analyzing trace with hash -2015651351, now seen corresponding path program 2 times [2021-08-06 19:42:01,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:01,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540147834] [2021-08-06 19:42:01,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:01,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:01,492 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:42:01,493 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:42:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:42:01,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:01,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540147834] [2021-08-06 19:42:01,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540147834] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:42:01,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:42:01,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:42:01,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718158534] [2021-08-06 19:42:01,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:42:01,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:01,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:42:01,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:42:01,503 INFO L87 Difference]: Start difference. First operand 2073 states and 5639 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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 19:42:01,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:01,575 INFO L93 Difference]: Finished difference Result 2748 states and 6914 transitions. [2021-08-06 19:42:01,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:42:01,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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 31 [2021-08-06 19:42:01,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:01,592 INFO L225 Difference]: With dead ends: 2748 [2021-08-06 19:42:01,592 INFO L226 Difference]: Without dead ends: 2738 [2021-08-06 19:42:01,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:42:01,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2021-08-06 19:42:01,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2113. [2021-08-06 19:42:01,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7452651515151514) internal successors, (5798), 2112 states have internal predecessors, (5798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5798 transitions. [2021-08-06 19:42:01,637 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5798 transitions. Word has length 31 [2021-08-06 19:42:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:01,637 INFO L470 AbstractCegarLoop]: Abstraction has 2113 states and 5798 transitions. [2021-08-06 19:42:01,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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 19:42:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5798 transitions. [2021-08-06 19:42:01,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:42:01,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:01,642 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:01,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-06 19:42:01,642 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:01,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:01,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1270501331, now seen corresponding path program 1 times [2021-08-06 19:42:01,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:01,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208941184] [2021-08-06 19:42:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:01,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:01,682 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:42:01,684 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:42:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:42:01,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:01,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208941184] [2021-08-06 19:42:01,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208941184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:01,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190729790] [2021-08-06 19:42:01,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:01,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:01,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:01,699 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 19:42:01,720 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 19:42:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:01,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:42:01,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:02,288 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 76.9 percent of original size [2021-08-06 19:42:02,290 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 76.9 percent of original size [2021-08-06 19:42:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:02,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190729790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:02,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:02,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-08-06 19:42:02,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457564925] [2021-08-06 19:42:02,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:42:02,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:02,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:42:02,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:42:02,311 INFO L87 Difference]: Start difference. First operand 2113 states and 5798 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 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 19:42:02,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:02,409 INFO L93 Difference]: Finished difference Result 2810 states and 7104 transitions. [2021-08-06 19:42:02,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:42:02,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 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 31 [2021-08-06 19:42:02,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:02,416 INFO L225 Difference]: With dead ends: 2810 [2021-08-06 19:42:02,416 INFO L226 Difference]: Without dead ends: 2800 [2021-08-06 19:42:02,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:42:02,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-08-06 19:42:02,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 2180. [2021-08-06 19:42:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 2.7801743919229005) internal successors, (6058), 2179 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:02,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 6058 transitions. [2021-08-06 19:42:02,452 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 6058 transitions. Word has length 31 [2021-08-06 19:42:02,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:02,452 INFO L470 AbstractCegarLoop]: Abstraction has 2180 states and 6058 transitions. [2021-08-06 19:42:02,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 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 19:42:02,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 6058 transitions. [2021-08-06 19:42:02,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:42:02,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:02,456 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:02,473 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 19:42:02,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-06 19:42:02,672 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:02,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1937194409, now seen corresponding path program 1 times [2021-08-06 19:42:02,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:02,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749406586] [2021-08-06 19:42:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:02,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:02,715 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:42:02,717 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:42:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:42:02,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:02,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749406586] [2021-08-06 19:42:02,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749406586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:02,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026298767] [2021-08-06 19:42:02,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:02,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:02,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:02,726 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 19:42:02,761 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 19:42:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:02,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:42:02,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:03,301 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 79.1 percent of original size [2021-08-06 19:42:03,303 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 79.1 percent of original size [2021-08-06 19:42:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:03,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026298767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:03,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:03,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-08-06 19:42:03,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263228076] [2021-08-06 19:42:03,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:42:03,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:03,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:42:03,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:42:03,331 INFO L87 Difference]: Start difference. First operand 2180 states and 6058 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 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 19:42:03,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:03,430 INFO L93 Difference]: Finished difference Result 2771 states and 7188 transitions. [2021-08-06 19:42:03,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:42:03,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 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 31 [2021-08-06 19:42:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:03,436 INFO L225 Difference]: With dead ends: 2771 [2021-08-06 19:42:03,436 INFO L226 Difference]: Without dead ends: 2763 [2021-08-06 19:42:03,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:42:03,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-08-06 19:42:03,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2273. [2021-08-06 19:42:03,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2273 states, 2272 states have (on average 2.7693661971830985) internal successors, (6292), 2272 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:03,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2273 states to 2273 states and 6292 transitions. [2021-08-06 19:42:03,474 INFO L78 Accepts]: Start accepts. Automaton has 2273 states and 6292 transitions. Word has length 31 [2021-08-06 19:42:03,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:03,474 INFO L470 AbstractCegarLoop]: Abstraction has 2273 states and 6292 transitions. [2021-08-06 19:42:03,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 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 19:42:03,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2273 states and 6292 transitions. [2021-08-06 19:42:03,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:42:03,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:03,478 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:03,498 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 19:42:03,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:03,695 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:03,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:03,695 INFO L82 PathProgramCache]: Analyzing trace with hash -815072279, now seen corresponding path program 2 times [2021-08-06 19:42:03,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:03,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007160049] [2021-08-06 19:42:03,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:03,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:03,727 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:42:03,729 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:42:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:42:03,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:03,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007160049] [2021-08-06 19:42:03,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007160049] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:42:03,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:42:03,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:42:03,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095276392] [2021-08-06 19:42:03,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:42:03,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:03,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:42:03,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:42:03,737 INFO L87 Difference]: Start difference. First operand 2273 states and 6292 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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 19:42:03,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:03,797 INFO L93 Difference]: Finished difference Result 2780 states and 7253 transitions. [2021-08-06 19:42:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:42:03,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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 31 [2021-08-06 19:42:03,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:03,803 INFO L225 Difference]: With dead ends: 2780 [2021-08-06 19:42:03,803 INFO L226 Difference]: Without dead ends: 2772 [2021-08-06 19:42:03,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:42:03,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2021-08-06 19:42:03,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 2345. [2021-08-06 19:42:03,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 2344 states have (on average 2.760665529010239) internal successors, (6471), 2344 states have internal predecessors, (6471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 6471 transitions. [2021-08-06 19:42:03,839 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 6471 transitions. Word has length 31 [2021-08-06 19:42:03,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:03,840 INFO L470 AbstractCegarLoop]: Abstraction has 2345 states and 6471 transitions. [2021-08-06 19:42:03,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 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 19:42:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 6471 transitions. [2021-08-06 19:42:03,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:42:03,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:03,843 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:03,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-06 19:42:03,843 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:03,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:03,844 INFO L82 PathProgramCache]: Analyzing trace with hash 776751149, now seen corresponding path program 2 times [2021-08-06 19:42:03,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:03,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613696119] [2021-08-06 19:42:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:03,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:03,884 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:42:03,886 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:42:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:42:03,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:03,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613696119] [2021-08-06 19:42:03,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613696119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:03,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279536981] [2021-08-06 19:42:03,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:42:03,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:03,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:03,895 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 19:42:03,910 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 19:42:04,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:42:04,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:04,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:42:04,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:04,492 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 79.1 percent of original size [2021-08-06 19:42:04,494 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 79.1 percent of original size [2021-08-06 19:42:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:04,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279536981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:04,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:04,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-08-06 19:42:04,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029099321] [2021-08-06 19:42:04,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:42:04,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:04,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:42:04,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:42:04,519 INFO L87 Difference]: Start difference. First operand 2345 states and 6471 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 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 19:42:04,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:04,648 INFO L93 Difference]: Finished difference Result 3019 states and 7732 transitions. [2021-08-06 19:42:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:42:04,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 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 31 [2021-08-06 19:42:04,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:04,654 INFO L225 Difference]: With dead ends: 3019 [2021-08-06 19:42:04,654 INFO L226 Difference]: Without dead ends: 3009 [2021-08-06 19:42:04,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:42:04,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-08-06 19:42:04,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 2409. [2021-08-06 19:42:04,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 2.7915282392026577) internal successors, (6722), 2408 states have internal predecessors, (6722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 6722 transitions. [2021-08-06 19:42:04,697 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 6722 transitions. Word has length 31 [2021-08-06 19:42:04,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:04,698 INFO L470 AbstractCegarLoop]: Abstraction has 2409 states and 6722 transitions. [2021-08-06 19:42:04,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 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 19:42:04,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 6722 transitions. [2021-08-06 19:42:04,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:04,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:04,702 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:04,721 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 19:42:04,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:04,917 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:04,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:04,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1492952551, now seen corresponding path program 3 times [2021-08-06 19:42:04,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:04,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769307483] [2021-08-06 19:42:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:04,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:04,946 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 19:42:04,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:04,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769307483] [2021-08-06 19:42:04,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769307483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:04,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126785142] [2021-08-06 19:42:04,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:42:04,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:04,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:04,953 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 19:42:04,954 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 19:42:05,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:42:05,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:05,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:05,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:05,316 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 19:42:05,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126785142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:05,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:05,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:05,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754380862] [2021-08-06 19:42:05,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:05,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:05,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:05,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:05,318 INFO L87 Difference]: Start difference. First operand 2409 states and 6722 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 19:42:05,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:05,625 INFO L93 Difference]: Finished difference Result 8751 states and 23420 transitions. [2021-08-06 19:42:05,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:42:05,625 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 33 [2021-08-06 19:42:05,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:05,648 INFO L225 Difference]: With dead ends: 8751 [2021-08-06 19:42:05,648 INFO L226 Difference]: Without dead ends: 8751 [2021-08-06 19:42:05,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:42:05,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8751 states. [2021-08-06 19:42:05,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8751 to 3901. [2021-08-06 19:42:05,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 2.742051282051282) internal successors, (10694), 3900 states have internal predecessors, (10694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:05,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 10694 transitions. [2021-08-06 19:42:05,766 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 10694 transitions. Word has length 33 [2021-08-06 19:42:05,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:05,766 INFO L470 AbstractCegarLoop]: Abstraction has 3901 states and 10694 transitions. [2021-08-06 19:42:05,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 19:42:05,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 10694 transitions. [2021-08-06 19:42:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:05,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:05,773 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:05,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:05,988 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,SelfDestructingSolverStorable16 [2021-08-06 19:42:05,989 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:05,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:05,989 INFO L82 PathProgramCache]: Analyzing trace with hash 40355563, now seen corresponding path program 4 times [2021-08-06 19:42:05,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:05,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098340432] [2021-08-06 19:42:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:05,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:06,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:06,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098340432] [2021-08-06 19:42:06,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098340432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:06,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237057371] [2021-08-06 19:42:06,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:42:06,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:06,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:06,020 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 19:42:06,021 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 19:42:06,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:42:06,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:06,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:06,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:06,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237057371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:06,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:06,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:06,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562185640] [2021-08-06 19:42:06,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:06,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:06,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:06,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:06,399 INFO L87 Difference]: Start difference. First operand 3901 states and 10694 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 19:42:06,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:06,590 INFO L93 Difference]: Finished difference Result 8767 states and 23339 transitions. [2021-08-06 19:42:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:42:06,590 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 33 [2021-08-06 19:42:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:06,610 INFO L225 Difference]: With dead ends: 8767 [2021-08-06 19:42:06,610 INFO L226 Difference]: Without dead ends: 8767 [2021-08-06 19:42:06,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:42:06,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8767 states. [2021-08-06 19:42:06,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8767 to 5459. [2021-08-06 19:42:06,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5459 states, 5458 states have (on average 2.727739098570905) internal successors, (14888), 5458 states have internal predecessors, (14888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5459 states to 5459 states and 14888 transitions. [2021-08-06 19:42:06,725 INFO L78 Accepts]: Start accepts. Automaton has 5459 states and 14888 transitions. Word has length 33 [2021-08-06 19:42:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:06,725 INFO L470 AbstractCegarLoop]: Abstraction has 5459 states and 14888 transitions. [2021-08-06 19:42:06,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 19:42:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 5459 states and 14888 transitions. [2021-08-06 19:42:06,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:06,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:06,735 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:06,754 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 19:42:06,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 19:42:06,949 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:06,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:06,949 INFO L82 PathProgramCache]: Analyzing trace with hash 140365547, now seen corresponding path program 5 times [2021-08-06 19:42:06,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:06,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509806740] [2021-08-06 19:42:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:06,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:07,000 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 19:42:07,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:07,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509806740] [2021-08-06 19:42:07,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509806740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:07,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940903357] [2021-08-06 19:42:07,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:42:07,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:07,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:07,005 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 19:42:07,006 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 19:42:07,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:42:07,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:07,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:07,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:07,422 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 19:42:07,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940903357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:07,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:07,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:07,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353849019] [2021-08-06 19:42:07,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:07,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:07,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:07,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:07,424 INFO L87 Difference]: Start difference. First operand 5459 states and 14888 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 19:42:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:07,574 INFO L93 Difference]: Finished difference Result 7887 states and 21002 transitions. [2021-08-06 19:42:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:42:07,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 33 [2021-08-06 19:42:07,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:07,593 INFO L225 Difference]: With dead ends: 7887 [2021-08-06 19:42:07,593 INFO L226 Difference]: Without dead ends: 7887 [2021-08-06 19:42:07,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:42:07,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7887 states. [2021-08-06 19:42:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7887 to 5463. [2021-08-06 19:42:07,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5463 states, 5462 states have (on average 2.7294031490296593) internal successors, (14908), 5462 states have internal predecessors, (14908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 14908 transitions. [2021-08-06 19:42:07,712 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 14908 transitions. Word has length 33 [2021-08-06 19:42:07,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:07,713 INFO L470 AbstractCegarLoop]: Abstraction has 5463 states and 14908 transitions. [2021-08-06 19:42:07,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 19:42:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 14908 transitions. [2021-08-06 19:42:07,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:07,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:07,722 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:07,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:07,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:07,940 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:07,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:07,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1760679659, now seen corresponding path program 6 times [2021-08-06 19:42:07,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:07,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029305763] [2021-08-06 19:42:07,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:07,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:07,969 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 19:42:07,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:07,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029305763] [2021-08-06 19:42:07,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029305763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:07,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216377810] [2021-08-06 19:42:07,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:42:07,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:07,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:07,971 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 19:42:07,972 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 19:42:08,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:42:08,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:08,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:08,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:08,382 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 19:42:08,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216377810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:08,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:08,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:08,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013603575] [2021-08-06 19:42:08,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:08,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:08,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:08,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:08,384 INFO L87 Difference]: Start difference. First operand 5463 states and 14908 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 19:42:08,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:08,558 INFO L93 Difference]: Finished difference Result 7725 states and 20546 transitions. [2021-08-06 19:42:08,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:42:08,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 33 [2021-08-06 19:42:08,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:08,606 INFO L225 Difference]: With dead ends: 7725 [2021-08-06 19:42:08,606 INFO L226 Difference]: Without dead ends: 7725 [2021-08-06 19:42:08,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:42:08,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7725 states. [2021-08-06 19:42:08,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7725 to 5947. [2021-08-06 19:42:08,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5947 states, 5946 states have (on average 2.7263706693575513) internal successors, (16211), 5946 states have internal predecessors, (16211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5947 states to 5947 states and 16211 transitions. [2021-08-06 19:42:08,700 INFO L78 Accepts]: Start accepts. Automaton has 5947 states and 16211 transitions. Word has length 33 [2021-08-06 19:42:08,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:08,700 INFO L470 AbstractCegarLoop]: Abstraction has 5947 states and 16211 transitions. [2021-08-06 19:42:08,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 19:42:08,700 INFO L276 IsEmpty]: Start isEmpty. Operand 5947 states and 16211 transitions. [2021-08-06 19:42:08,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:08,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:08,710 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:08,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:08,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:08,921 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:08,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:08,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1938584917, now seen corresponding path program 7 times [2021-08-06 19:42:08,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:08,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557598542] [2021-08-06 19:42:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:08,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:08,957 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 19:42:08,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:08,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557598542] [2021-08-06 19:42:08,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557598542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:08,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593953124] [2021-08-06 19:42:08,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:42:08,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:08,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:08,961 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 19:42:08,984 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 19:42:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:09,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:09,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:09,360 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 19:42:09,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593953124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:09,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:09,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:09,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628450379] [2021-08-06 19:42:09,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:09,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:09,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:09,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:09,362 INFO L87 Difference]: Start difference. First operand 5947 states and 16211 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 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 19:42:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:09,575 INFO L93 Difference]: Finished difference Result 13274 states and 35670 transitions. [2021-08-06 19:42:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:42:09,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 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 33 [2021-08-06 19:42:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:09,601 INFO L225 Difference]: With dead ends: 13274 [2021-08-06 19:42:09,601 INFO L226 Difference]: Without dead ends: 13274 [2021-08-06 19:42:09,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:42:09,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13274 states. [2021-08-06 19:42:09,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13274 to 8460. [2021-08-06 19:42:09,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8460 states, 8459 states have (on average 2.7341293297080034) internal successors, (23128), 8459 states have internal predecessors, (23128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:09,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8460 states to 8460 states and 23128 transitions. [2021-08-06 19:42:09,798 INFO L78 Accepts]: Start accepts. Automaton has 8460 states and 23128 transitions. Word has length 33 [2021-08-06 19:42:09,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:09,798 INFO L470 AbstractCegarLoop]: Abstraction has 8460 states and 23128 transitions. [2021-08-06 19:42:09,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 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 19:42:09,798 INFO L276 IsEmpty]: Start isEmpty. Operand 8460 states and 23128 transitions. [2021-08-06 19:42:09,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:09,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:09,816 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:09,833 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 19:42:10,040 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,SelfDestructingSolverStorable20 [2021-08-06 19:42:10,041 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:10,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:10,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1533408469, now seen corresponding path program 8 times [2021-08-06 19:42:10,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:10,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225413114] [2021-08-06 19:42:10,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:10,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:10,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:10,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225413114] [2021-08-06 19:42:10,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225413114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:10,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908534357] [2021-08-06 19:42:10,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:42:10,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:10,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:10,081 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 19:42:10,082 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 19:42:10,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:42:10,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:10,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:10,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:10,535 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 19:42:10,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908534357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:10,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:10,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:10,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152811638] [2021-08-06 19:42:10,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:10,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:10,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:10,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:10,537 INFO L87 Difference]: Start difference. First operand 8460 states and 23128 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 19:42:10,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:10,757 INFO L93 Difference]: Finished difference Result 11003 states and 29553 transitions. [2021-08-06 19:42:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:42:10,759 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 33 [2021-08-06 19:42:10,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:10,777 INFO L225 Difference]: With dead ends: 11003 [2021-08-06 19:42:10,777 INFO L226 Difference]: Without dead ends: 11003 [2021-08-06 19:42:10,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:42:10,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11003 states. [2021-08-06 19:42:10,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11003 to 8460. [2021-08-06 19:42:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8460 states, 8459 states have (on average 2.732237853174134) internal successors, (23112), 8459 states have internal predecessors, (23112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:10,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8460 states to 8460 states and 23112 transitions. [2021-08-06 19:42:10,917 INFO L78 Accepts]: Start accepts. Automaton has 8460 states and 23112 transitions. Word has length 33 [2021-08-06 19:42:10,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:10,917 INFO L470 AbstractCegarLoop]: Abstraction has 8460 states and 23112 transitions. [2021-08-06 19:42:10,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 19:42:10,917 INFO L276 IsEmpty]: Start isEmpty. Operand 8460 states and 23112 transitions. [2021-08-06 19:42:10,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:10,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:10,931 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:10,948 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 19:42:11,144 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,SelfDestructingSolverStorable21 [2021-08-06 19:42:11,145 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:11,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:11,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1433398485, now seen corresponding path program 9 times [2021-08-06 19:42:11,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:11,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752498625] [2021-08-06 19:42:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:11,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:11,176 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 19:42:11,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:11,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752498625] [2021-08-06 19:42:11,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752498625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:11,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314943102] [2021-08-06 19:42:11,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:42:11,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:11,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:11,177 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 19:42:11,178 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 19:42:11,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 19:42:11,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:11,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:11,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:11,580 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 19:42:11,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314943102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:11,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:11,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:11,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624225966] [2021-08-06 19:42:11,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:11,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:11,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:11,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:11,581 INFO L87 Difference]: Start difference. First operand 8460 states and 23112 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 19:42:11,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:11,736 INFO L93 Difference]: Finished difference Result 9683 states and 26109 transitions. [2021-08-06 19:42:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:42:11,736 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 33 [2021-08-06 19:42:11,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:11,754 INFO L225 Difference]: With dead ends: 9683 [2021-08-06 19:42:11,755 INFO L226 Difference]: Without dead ends: 9683 [2021-08-06 19:42:11,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:42:11,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9683 states. [2021-08-06 19:42:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9683 to 8458. [2021-08-06 19:42:11,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8458 states, 8457 states have (on average 2.731465058531394) internal successors, (23100), 8457 states have internal predecessors, (23100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:11,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8458 states to 8458 states and 23100 transitions. [2021-08-06 19:42:11,915 INFO L78 Accepts]: Start accepts. Automaton has 8458 states and 23100 transitions. Word has length 33 [2021-08-06 19:42:11,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:11,915 INFO L470 AbstractCegarLoop]: Abstraction has 8458 states and 23100 transitions. [2021-08-06 19:42:11,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 19:42:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 8458 states and 23100 transitions. [2021-08-06 19:42:11,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:11,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:11,928 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:11,946 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 19:42:12,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:12,144 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:12,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:12,145 INFO L82 PathProgramCache]: Analyzing trace with hash 170761959, now seen corresponding path program 10 times [2021-08-06 19:42:12,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:12,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868466305] [2021-08-06 19:42:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:12,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:12,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:12,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868466305] [2021-08-06 19:42:12,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868466305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:12,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149681186] [2021-08-06 19:42:12,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:42:12,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:12,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:12,183 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 19:42:12,185 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 19:42:12,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:42:12,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:12,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:12,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:12,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149681186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:12,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:12,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:12,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719634879] [2021-08-06 19:42:12,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:12,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:12,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:12,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:12,568 INFO L87 Difference]: Start difference. First operand 8458 states and 23100 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 19:42:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:12,726 INFO L93 Difference]: Finished difference Result 11740 states and 31611 transitions. [2021-08-06 19:42:12,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:42:12,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 33 [2021-08-06 19:42:12,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:12,747 INFO L225 Difference]: With dead ends: 11740 [2021-08-06 19:42:12,747 INFO L226 Difference]: Without dead ends: 11740 [2021-08-06 19:42:12,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:42:12,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11740 states. [2021-08-06 19:42:12,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11740 to 9547. [2021-08-06 19:42:12,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9547 states, 9546 states have (on average 2.724596689712969) internal successors, (26009), 9546 states have internal predecessors, (26009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9547 states to 9547 states and 26009 transitions. [2021-08-06 19:42:12,928 INFO L78 Accepts]: Start accepts. Automaton has 9547 states and 26009 transitions. Word has length 33 [2021-08-06 19:42:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:12,928 INFO L470 AbstractCegarLoop]: Abstraction has 9547 states and 26009 transitions. [2021-08-06 19:42:12,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 19:42:12,928 INFO L276 IsEmpty]: Start isEmpty. Operand 9547 states and 26009 transitions. [2021-08-06 19:42:12,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:12,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:12,943 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:12,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:13,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:13,157 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:13,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:13,157 INFO L82 PathProgramCache]: Analyzing trace with hash 884312431, now seen corresponding path program 3 times [2021-08-06 19:42:13,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:13,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019816774] [2021-08-06 19:42:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:13,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:13,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:13,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019816774] [2021-08-06 19:42:13,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019816774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:13,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824248993] [2021-08-06 19:42:13,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:42:13,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:13,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:13,185 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 19:42:13,187 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 19:42:13,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:42:13,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:13,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:13,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:13,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824248993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:13,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:13,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:13,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256187138] [2021-08-06 19:42:13,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:13,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:13,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:13,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:13,628 INFO L87 Difference]: Start difference. First operand 9547 states and 26009 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 19:42:13,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:13,943 INFO L93 Difference]: Finished difference Result 30549 states and 76874 transitions. [2021-08-06 19:42:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:42:13,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 33 [2021-08-06 19:42:13,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:14,011 INFO L225 Difference]: With dead ends: 30549 [2021-08-06 19:42:14,011 INFO L226 Difference]: Without dead ends: 30549 [2021-08-06 19:42:14,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:42:14,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30549 states. [2021-08-06 19:42:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30549 to 20358. [2021-08-06 19:42:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20358 states, 20357 states have (on average 2.630151790538881) internal successors, (53542), 20357 states have internal predecessors, (53542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20358 states to 20358 states and 53542 transitions. [2021-08-06 19:42:14,405 INFO L78 Accepts]: Start accepts. Automaton has 20358 states and 53542 transitions. Word has length 33 [2021-08-06 19:42:14,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:14,405 INFO L470 AbstractCegarLoop]: Abstraction has 20358 states and 53542 transitions. [2021-08-06 19:42:14,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 19:42:14,405 INFO L276 IsEmpty]: Start isEmpty. Operand 20358 states and 53542 transitions. [2021-08-06 19:42:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:14,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:14,440 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:14,458 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 19:42:14,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-06 19:42:14,646 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:14,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:14,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1506615535, now seen corresponding path program 4 times [2021-08-06 19:42:14,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:14,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781653578] [2021-08-06 19:42:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:14,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:14,672 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 19:42:14,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:14,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781653578] [2021-08-06 19:42:14,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781653578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:14,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045256474] [2021-08-06 19:42:14,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:42:14,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:14,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:14,673 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 19:42:14,674 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 19:42:14,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:42:14,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:14,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:14,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:15,171 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 19:42:15,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045256474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:15,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:15,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:15,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651958983] [2021-08-06 19:42:15,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:15,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:15,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:15,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:15,172 INFO L87 Difference]: Start difference. First operand 20358 states and 53542 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 19:42:15,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:15,450 INFO L93 Difference]: Finished difference Result 43614 states and 108909 transitions. [2021-08-06 19:42:15,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:42:15,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 33 [2021-08-06 19:42:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:15,549 INFO L225 Difference]: With dead ends: 43614 [2021-08-06 19:42:15,549 INFO L226 Difference]: Without dead ends: 43614 [2021-08-06 19:42:15,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:42:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43614 states. [2021-08-06 19:42:16,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43614 to 29472. [2021-08-06 19:42:16,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29472 states, 29471 states have (on average 2.672661260221913) internal successors, (78766), 29471 states have internal predecessors, (78766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29472 states to 29472 states and 78766 transitions. [2021-08-06 19:42:16,202 INFO L78 Accepts]: Start accepts. Automaton has 29472 states and 78766 transitions. Word has length 33 [2021-08-06 19:42:16,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:16,202 INFO L470 AbstractCegarLoop]: Abstraction has 29472 states and 78766 transitions. [2021-08-06 19:42:16,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 19:42:16,202 INFO L276 IsEmpty]: Start isEmpty. Operand 29472 states and 78766 transitions. [2021-08-06 19:42:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:16,255 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:16,255 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:16,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:16,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-06 19:42:16,457 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:16,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:16,457 INFO L82 PathProgramCache]: Analyzing trace with hash 663491691, now seen corresponding path program 5 times [2021-08-06 19:42:16,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:16,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50055150] [2021-08-06 19:42:16,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:16,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:16,586 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 19:42:16,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:16,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50055150] [2021-08-06 19:42:16,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50055150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:16,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453337868] [2021-08-06 19:42:16,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:42:16,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:16,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:16,587 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 19:42:16,588 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 19:42:16,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:42:16,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:16,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:16,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:17,087 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 19:42:17,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453337868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:17,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:17,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:17,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638078860] [2021-08-06 19:42:17,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:17,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:17,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:17,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:17,089 INFO L87 Difference]: Start difference. First operand 29472 states and 78766 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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 19:42:17,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:17,331 INFO L93 Difference]: Finished difference Result 33520 states and 86678 transitions. [2021-08-06 19:42:17,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:42:17,332 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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 33 [2021-08-06 19:42:17,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:17,410 INFO L225 Difference]: With dead ends: 33520 [2021-08-06 19:42:17,410 INFO L226 Difference]: Without dead ends: 33520 [2021-08-06 19:42:17,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:42:17,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33520 states. [2021-08-06 19:42:17,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33520 to 29472. [2021-08-06 19:42:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29472 states, 29471 states have (on average 2.672661260221913) internal successors, (78766), 29471 states have internal predecessors, (78766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29472 states to 29472 states and 78766 transitions. [2021-08-06 19:42:18,009 INFO L78 Accepts]: Start accepts. Automaton has 29472 states and 78766 transitions. Word has length 33 [2021-08-06 19:42:18,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:18,009 INFO L470 AbstractCegarLoop]: Abstraction has 29472 states and 78766 transitions. [2021-08-06 19:42:18,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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 19:42:18,009 INFO L276 IsEmpty]: Start isEmpty. Operand 29472 states and 78766 transitions. [2021-08-06 19:42:18,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:18,060 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:18,060 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:18,077 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 19:42:18,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 19:42:18,261 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:18,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:18,261 INFO L82 PathProgramCache]: Analyzing trace with hash 771984359, now seen corresponding path program 3 times [2021-08-06 19:42:18,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:18,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564612854] [2021-08-06 19:42:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:18,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:18,373 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 19:42:18,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:18,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564612854] [2021-08-06 19:42:18,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564612854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:18,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870464353] [2021-08-06 19:42:18,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:42:18,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:18,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:18,374 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 19:42:18,375 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 19:42:18,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:42:18,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:18,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:18,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:18,814 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 19:42:18,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870464353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:18,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:18,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:18,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137144157] [2021-08-06 19:42:18,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:18,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:18,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:18,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:18,815 INFO L87 Difference]: Start difference. First operand 29472 states and 78766 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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 19:42:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:19,545 INFO L93 Difference]: Finished difference Result 108984 states and 240193 transitions. [2021-08-06 19:42:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:42:19,545 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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 33 [2021-08-06 19:42:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:20,040 INFO L225 Difference]: With dead ends: 108984 [2021-08-06 19:42:20,040 INFO L226 Difference]: Without dead ends: 108984 [2021-08-06 19:42:20,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:42:20,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108984 states. [2021-08-06 19:42:21,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108984 to 56920. [2021-08-06 19:42:21,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56920 states, 56919 states have (on average 2.489854003056976) internal successors, (141720), 56919 states have internal predecessors, (141720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56920 states to 56920 states and 141720 transitions. [2021-08-06 19:42:21,761 INFO L78 Accepts]: Start accepts. Automaton has 56920 states and 141720 transitions. Word has length 33 [2021-08-06 19:42:21,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:21,761 INFO L470 AbstractCegarLoop]: Abstraction has 56920 states and 141720 transitions. [2021-08-06 19:42:21,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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 19:42:21,762 INFO L276 IsEmpty]: Start isEmpty. Operand 56920 states and 141720 transitions. [2021-08-06 19:42:21,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:21,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:21,887 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:21,910 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 19:42:22,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:22,088 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:22,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1922386155, now seen corresponding path program 4 times [2021-08-06 19:42:22,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:22,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660423834] [2021-08-06 19:42:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:22,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:22,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:22,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660423834] [2021-08-06 19:42:22,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660423834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:22,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915725139] [2021-08-06 19:42:22,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:42:22,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:22,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:22,118 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 19:42:22,119 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 19:42:22,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:42:22,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:22,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:22,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:22,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915725139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:22,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:22,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:22,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965202185] [2021-08-06 19:42:22,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:22,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:22,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:22,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:22,690 INFO L87 Difference]: Start difference. First operand 56920 states and 141720 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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 19:42:23,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:23,456 INFO L93 Difference]: Finished difference Result 111327 states and 250458 transitions. [2021-08-06 19:42:23,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:42:23,456 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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 33 [2021-08-06 19:42:23,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:23,816 INFO L225 Difference]: With dead ends: 111327 [2021-08-06 19:42:23,816 INFO L226 Difference]: Without dead ends: 111327 [2021-08-06 19:42:23,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:42:23,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111327 states. [2021-08-06 19:42:25,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111327 to 87977. [2021-08-06 19:42:25,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87977 states, 87976 states have (on average 2.436209875420569) internal successors, (214328), 87976 states have internal predecessors, (214328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87977 states to 87977 states and 214328 transitions. [2021-08-06 19:42:26,020 INFO L78 Accepts]: Start accepts. Automaton has 87977 states and 214328 transitions. Word has length 33 [2021-08-06 19:42:26,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:26,020 INFO L470 AbstractCegarLoop]: Abstraction has 87977 states and 214328 transitions. [2021-08-06 19:42:26,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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 19:42:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 87977 states and 214328 transitions. [2021-08-06 19:42:26,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:26,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:26,195 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:26,212 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 19:42:26,396 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,SelfDestructingSolverStorable28 [2021-08-06 19:42:26,396 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:26,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:26,396 INFO L82 PathProgramCache]: Analyzing trace with hash 755525867, now seen corresponding path program 5 times [2021-08-06 19:42:26,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:26,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472415889] [2021-08-06 19:42:26,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:26,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:26,431 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 19:42:26,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:26,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472415889] [2021-08-06 19:42:26,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472415889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:26,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952291238] [2021-08-06 19:42:26,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:42:26,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:26,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:26,432 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 19:42:26,433 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 19:42:26,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:42:26,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:26,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:26,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:27,103 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 19:42:27,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952291238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:27,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:27,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:27,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800340769] [2021-08-06 19:42:27,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:27,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:27,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:27,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:27,105 INFO L87 Difference]: Start difference. First operand 87977 states and 214328 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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 19:42:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:27,599 INFO L93 Difference]: Finished difference Result 96999 states and 223352 transitions. [2021-08-06 19:42:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:42:27,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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 33 [2021-08-06 19:42:27,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:27,999 INFO L225 Difference]: With dead ends: 96999 [2021-08-06 19:42:27,999 INFO L226 Difference]: Without dead ends: 96997 [2021-08-06 19:42:28,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:42:28,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96997 states. [2021-08-06 19:42:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96997 to 87977. [2021-08-06 19:42:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87977 states, 87976 states have (on average 2.4361985086841864) internal successors, (214327), 87976 states have internal predecessors, (214327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:29,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87977 states to 87977 states and 214327 transitions. [2021-08-06 19:42:29,817 INFO L78 Accepts]: Start accepts. Automaton has 87977 states and 214327 transitions. Word has length 33 [2021-08-06 19:42:29,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:29,817 INFO L470 AbstractCegarLoop]: Abstraction has 87977 states and 214327 transitions. [2021-08-06 19:42:29,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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 19:42:29,817 INFO L276 IsEmpty]: Start isEmpty. Operand 87977 states and 214327 transitions. [2021-08-06 19:42:30,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:30,296 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:30,296 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:30,313 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 19:42:30,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:30,497 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:30,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:30,497 INFO L82 PathProgramCache]: Analyzing trace with hash 389253355, now seen corresponding path program 6 times [2021-08-06 19:42:30,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:30,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827438550] [2021-08-06 19:42:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:30,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:30,526 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 19:42:30,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:30,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827438550] [2021-08-06 19:42:30,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827438550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:30,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249424035] [2021-08-06 19:42:30,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:42:30,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:30,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:30,528 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 19:42:30,528 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 19:42:30,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:42:30,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:30,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:30,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:31,041 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 19:42:31,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249424035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:31,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:31,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:31,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581428546] [2021-08-06 19:42:31,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:31,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:31,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:31,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:31,043 INFO L87 Difference]: Start difference. First operand 87977 states and 214327 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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 19:42:31,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:31,638 INFO L93 Difference]: Finished difference Result 96995 states and 223344 transitions. [2021-08-06 19:42:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:42:31,638 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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 33 [2021-08-06 19:42:31,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:32,098 INFO L225 Difference]: With dead ends: 96995 [2021-08-06 19:42:32,098 INFO L226 Difference]: Without dead ends: 96989 [2021-08-06 19:42:32,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:42:32,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96989 states. [2021-08-06 19:42:33,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96989 to 87983. [2021-08-06 19:42:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87983 states, 87982 states have (on average 2.4361232979473075) internal successors, (214335), 87982 states have internal predecessors, (214335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:34,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87983 states to 87983 states and 214335 transitions. [2021-08-06 19:42:34,059 INFO L78 Accepts]: Start accepts. Automaton has 87983 states and 214335 transitions. Word has length 33 [2021-08-06 19:42:34,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:34,059 INFO L470 AbstractCegarLoop]: Abstraction has 87983 states and 214335 transitions. [2021-08-06 19:42:34,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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 19:42:34,060 INFO L276 IsEmpty]: Start isEmpty. Operand 87983 states and 214335 transitions. [2021-08-06 19:42:34,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:34,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:34,236 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:34,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-06 19:42:34,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:34,438 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:34,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:34,438 INFO L82 PathProgramCache]: Analyzing trace with hash -894001493, now seen corresponding path program 7 times [2021-08-06 19:42:34,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:34,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721755824] [2021-08-06 19:42:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:34,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:34,465 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 19:42:34,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:34,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721755824] [2021-08-06 19:42:34,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721755824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:34,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653037776] [2021-08-06 19:42:34,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:42:34,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:34,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:34,467 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 19:42:34,467 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 19:42:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:35,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:35,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:35,232 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 19:42:35,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653037776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:35,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:35,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:35,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812436187] [2021-08-06 19:42:35,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:35,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:35,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:35,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:35,233 INFO L87 Difference]: Start difference. First operand 87983 states and 214335 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:36,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:36,201 INFO L93 Difference]: Finished difference Result 174655 states and 409314 transitions. [2021-08-06 19:42:36,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:42:36,201 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 19:42:36,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:37,033 INFO L225 Difference]: With dead ends: 174655 [2021-08-06 19:42:37,033 INFO L226 Difference]: Without dead ends: 174655 [2021-08-06 19:42:37,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:42:37,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174655 states. [2021-08-06 19:42:39,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174655 to 141737. [2021-08-06 19:42:39,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141737 states, 141736 states have (on average 2.4921262064683636) internal successors, (353224), 141736 states have internal predecessors, (353224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:40,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141737 states to 141737 states and 353224 transitions. [2021-08-06 19:42:40,615 INFO L78 Accepts]: Start accepts. Automaton has 141737 states and 353224 transitions. Word has length 33 [2021-08-06 19:42:40,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:40,615 INFO L470 AbstractCegarLoop]: Abstraction has 141737 states and 353224 transitions. [2021-08-06 19:42:40,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:40,615 INFO L276 IsEmpty]: Start isEmpty. Operand 141737 states and 353224 transitions. [2021-08-06 19:42:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:40,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:40,938 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:40,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-06 19:42:41,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:41,140 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:41,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:41,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1601013973, now seen corresponding path program 8 times [2021-08-06 19:42:41,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:41,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446981325] [2021-08-06 19:42:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:41,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:41,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:41,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446981325] [2021-08-06 19:42:41,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446981325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:41,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209741833] [2021-08-06 19:42:41,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:42:41,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:41,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:41,169 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 19:42:41,192 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 19:42:41,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:42:41,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:41,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:41,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:41,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209741833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:41,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:41,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:41,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922101088] [2021-08-06 19:42:41,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:41,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:41,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:41,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:41,929 INFO L87 Difference]: Start difference. First operand 141737 states and 353224 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:42,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:42,921 INFO L93 Difference]: Finished difference Result 163269 states and 393140 transitions. [2021-08-06 19:42:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:42:42,921 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 19:42:42,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:43,481 INFO L225 Difference]: With dead ends: 163269 [2021-08-06 19:42:43,481 INFO L226 Difference]: Without dead ends: 163269 [2021-08-06 19:42:43,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:42:43,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163269 states. [2021-08-06 19:42:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163269 to 141737. [2021-08-06 19:42:46,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141737 states, 141736 states have (on average 2.4921120957272676) internal successors, (353222), 141736 states have internal predecessors, (353222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141737 states to 141737 states and 353222 transitions. [2021-08-06 19:42:47,050 INFO L78 Accepts]: Start accepts. Automaton has 141737 states and 353222 transitions. Word has length 33 [2021-08-06 19:42:47,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:47,050 INFO L470 AbstractCegarLoop]: Abstraction has 141737 states and 353222 transitions. [2021-08-06 19:42:47,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:47,050 INFO L276 IsEmpty]: Start isEmpty. Operand 141737 states and 353222 transitions. [2021-08-06 19:42:47,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:47,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:47,709 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:47,725 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 19:42:47,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:47,910 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:47,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:47,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1527093035, now seen corresponding path program 9 times [2021-08-06 19:42:47,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:47,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424638416] [2021-08-06 19:42:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:47,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:47,934 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 19:42:47,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:47,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424638416] [2021-08-06 19:42:47,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424638416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:47,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795865260] [2021-08-06 19:42:47,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:42:47,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:47,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:47,936 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 19:42:47,949 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 19:42:48,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 19:42:48,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:48,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:48,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:48,441 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 19:42:48,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795865260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:48,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:48,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:48,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528684108] [2021-08-06 19:42:48,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:48,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:48,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:48,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:48,442 INFO L87 Difference]: Start difference. First operand 141737 states and 353222 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:49,306 INFO L93 Difference]: Finished difference Result 148927 states and 360409 transitions. [2021-08-06 19:42:49,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:42:49,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 19:42:49,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:50,030 INFO L225 Difference]: With dead ends: 148927 [2021-08-06 19:42:50,030 INFO L226 Difference]: Without dead ends: 148925 [2021-08-06 19:42:50,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:42:50,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148925 states. [2021-08-06 19:42:52,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148925 to 141737. [2021-08-06 19:42:52,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141737 states, 141736 states have (on average 2.4921050403567193) internal successors, (353221), 141736 states have internal predecessors, (353221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:53,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141737 states to 141737 states and 353221 transitions. [2021-08-06 19:42:53,590 INFO L78 Accepts]: Start accepts. Automaton has 141737 states and 353221 transitions. Word has length 33 [2021-08-06 19:42:53,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:53,591 INFO L470 AbstractCegarLoop]: Abstraction has 141737 states and 353221 transitions. [2021-08-06 19:42:53,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:53,591 INFO L276 IsEmpty]: Start isEmpty. Operand 141737 states and 353221 transitions. [2021-08-06 19:42:54,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:42:54,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:54,287 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:54,305 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 19:42:54,489 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,SelfDestructingSolverStorable33 [2021-08-06 19:42:54,489 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:42:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:54,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2042875673, now seen corresponding path program 10 times [2021-08-06 19:42:54,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:54,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929864043] [2021-08-06 19:42:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:54,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:54,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:54,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929864043] [2021-08-06 19:42:54,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929864043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:54,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657077223] [2021-08-06 19:42:54,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:42:54,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:54,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:54,553 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 19:42:54,554 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 19:42:54,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:42:54,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:54,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:42:54,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:55,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657077223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:55,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:55,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:42:55,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930969017] [2021-08-06 19:42:55,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:42:55,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:55,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:42:55,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:42:55,084 INFO L87 Difference]: Start difference. First operand 141737 states and 353221 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:56,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:56,436 INFO L93 Difference]: Finished difference Result 189521 states and 452938 transitions. [2021-08-06 19:42:56,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:42:56,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 19:42:56,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:57,070 INFO L225 Difference]: With dead ends: 189521 [2021-08-06 19:42:57,070 INFO L226 Difference]: Without dead ends: 189521 [2021-08-06 19:42:57,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:42:57,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189521 states. [2021-08-06 19:43:00,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189521 to 163229. [2021-08-06 19:43:00,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163229 states, 163228 states have (on average 2.4719165829392016) internal successors, (403486), 163228 states have internal predecessors, (403486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163229 states to 163229 states and 403486 transitions. [2021-08-06 19:43:00,784 INFO L78 Accepts]: Start accepts. Automaton has 163229 states and 403486 transitions. Word has length 33 [2021-08-06 19:43:00,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:00,784 INFO L470 AbstractCegarLoop]: Abstraction has 163229 states and 403486 transitions. [2021-08-06 19:43:00,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 163229 states and 403486 transitions. [2021-08-06 19:43:01,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:43:01,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:01,524 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:01,541 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 19:43:01,725 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,SelfDestructingSolverStorable34 [2021-08-06 19:43:01,725 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:43:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:01,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1048790673, now seen corresponding path program 6 times [2021-08-06 19:43:01,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:01,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387237567] [2021-08-06 19:43:01,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:01,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:01,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:01,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387237567] [2021-08-06 19:43:01,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387237567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:01,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952236103] [2021-08-06 19:43:01,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:43:01,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:01,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:01,767 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 19:43:01,768 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 19:43:02,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:43:02,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:02,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:43:02,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:02,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952236103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:02,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:02,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:43:02,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161446129] [2021-08-06 19:43:02,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:43:02,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:02,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:43:02,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:43:02,485 INFO L87 Difference]: Start difference. First operand 163229 states and 403486 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 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 19:43:04,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:04,732 INFO L93 Difference]: Finished difference Result 354553 states and 851427 transitions. [2021-08-06 19:43:04,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:43:04,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 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 33 [2021-08-06 19:43:04,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:06,419 INFO L225 Difference]: With dead ends: 354553 [2021-08-06 19:43:06,419 INFO L226 Difference]: Without dead ends: 354553 [2021-08-06 19:43:06,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:43:06,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354553 states. [2021-08-06 19:43:12,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354553 to 291567. [2021-08-06 19:43:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291567 states, 291566 states have (on average 2.44976094606367) internal successors, (714267), 291566 states have internal predecessors, (714267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291567 states to 291567 states and 714267 transitions. [2021-08-06 19:43:14,757 INFO L78 Accepts]: Start accepts. Automaton has 291567 states and 714267 transitions. Word has length 33 [2021-08-06 19:43:14,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:14,757 INFO L470 AbstractCegarLoop]: Abstraction has 291567 states and 714267 transitions. [2021-08-06 19:43:14,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 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 19:43:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 291567 states and 714267 transitions. [2021-08-06 19:43:15,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:43:15,778 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:15,778 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:15,796 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 19:43:15,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 19:43:15,993 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:43:15,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:15,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1821227247, now seen corresponding path program 7 times [2021-08-06 19:43:15,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:15,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801795598] [2021-08-06 19:43:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:15,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:16,019 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 19:43:16,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:16,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801795598] [2021-08-06 19:43:16,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801795598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:16,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035692462] [2021-08-06 19:43:16,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:43:16,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:16,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:16,020 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 19:43:16,021 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 19:43:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:16,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:43:16,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:16,547 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 19:43:16,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035692462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:16,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:16,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:43:16,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717281423] [2021-08-06 19:43:16,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:43:16,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:16,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:43:16,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:43:16,548 INFO L87 Difference]: Start difference. First operand 291567 states and 714267 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:19,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:19,191 INFO L93 Difference]: Finished difference Result 377243 states and 910311 transitions. [2021-08-06 19:43:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:43:19,193 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 19:43:19,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:21,694 INFO L225 Difference]: With dead ends: 377243 [2021-08-06 19:43:21,694 INFO L226 Difference]: Without dead ends: 377243 [2021-08-06 19:43:21,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:43:22,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377243 states. [2021-08-06 19:43:28,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377243 to 302735. [2021-08-06 19:43:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302735 states, 302734 states have (on average 2.458075406132116) internal successors, (744143), 302734 states have internal predecessors, (744143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:30,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302735 states to 302735 states and 744143 transitions. [2021-08-06 19:43:30,518 INFO L78 Accepts]: Start accepts. Automaton has 302735 states and 744143 transitions. Word has length 33 [2021-08-06 19:43:30,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:30,518 INFO L470 AbstractCegarLoop]: Abstraction has 302735 states and 744143 transitions. [2021-08-06 19:43:30,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:30,519 INFO L276 IsEmpty]: Start isEmpty. Operand 302735 states and 744143 transitions. [2021-08-06 19:43:31,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:43:31,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:31,594 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:31,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-06 19:43:31,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:31,794 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:43:31,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:31,795 INFO L82 PathProgramCache]: Analyzing trace with hash 978103403, now seen corresponding path program 8 times [2021-08-06 19:43:31,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:31,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060000042] [2021-08-06 19:43:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:31,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:31,830 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 19:43:31,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:31,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060000042] [2021-08-06 19:43:31,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060000042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:31,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171133068] [2021-08-06 19:43:31,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:43:31,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:31,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:31,831 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 19:43:31,832 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 19:43:32,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:43:32,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:32,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:43:32,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:32,630 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 19:43:32,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171133068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:32,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:32,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:43:32,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058077759] [2021-08-06 19:43:32,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:43:32,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:32,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:43:32,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:43:32,631 INFO L87 Difference]: Start difference. First operand 302735 states and 744143 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 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 19:43:34,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:34,675 INFO L93 Difference]: Finished difference Result 326541 states and 790764 transitions. [2021-08-06 19:43:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:43:34,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 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 33 [2021-08-06 19:43:34,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:36,170 INFO L225 Difference]: With dead ends: 326541 [2021-08-06 19:43:36,170 INFO L226 Difference]: Without dead ends: 326541 [2021-08-06 19:43:36,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:43:36,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326541 states. [2021-08-06 19:43:42,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326541 to 302735. [2021-08-06 19:43:42,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302735 states, 302734 states have (on average 2.458075406132116) internal successors, (744143), 302734 states have internal predecessors, (744143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302735 states to 302735 states and 744143 transitions. [2021-08-06 19:43:43,824 INFO L78 Accepts]: Start accepts. Automaton has 302735 states and 744143 transitions. Word has length 33 [2021-08-06 19:43:43,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:43,824 INFO L470 AbstractCegarLoop]: Abstraction has 302735 states and 744143 transitions. [2021-08-06 19:43:43,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 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 19:43:43,824 INFO L276 IsEmpty]: Start isEmpty. Operand 302735 states and 744143 transitions. [2021-08-06 19:43:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:43:44,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:44,890 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:44,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 19:43:45,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 19:43:45,098 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:43:45,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:45,098 INFO L82 PathProgramCache]: Analyzing trace with hash -836966229, now seen corresponding path program 9 times [2021-08-06 19:43:45,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:45,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33660840] [2021-08-06 19:43:45,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:45,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:45,122 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 19:43:45,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:45,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33660840] [2021-08-06 19:43:45,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33660840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:45,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549145078] [2021-08-06 19:43:45,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:43:45,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:45,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:45,125 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 19:43:45,125 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 19:43:45,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:43:45,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:45,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:43:45,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:45,874 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 19:43:45,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549145078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:45,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:45,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:43:45,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333535818] [2021-08-06 19:43:45,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:43:45,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:45,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:43:45,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:43:45,875 INFO L87 Difference]: Start difference. First operand 302735 states and 744143 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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 19:43:49,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:49,688 INFO L93 Difference]: Finished difference Result 466741 states and 1117428 transitions. [2021-08-06 19:43:49,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:43:49,688 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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 33 [2021-08-06 19:43:49,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:52,000 INFO L225 Difference]: With dead ends: 466741 [2021-08-06 19:43:52,001 INFO L226 Difference]: Without dead ends: 466741 [2021-08-06 19:43:52,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:43:52,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466741 states. [2021-08-06 19:43:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466741 to 347613. [2021-08-06 19:44:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347613 states, 347612 states have (on average 2.4393432907954846) internal successors, (847945), 347612 states have internal predecessors, (847945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347613 states to 347613 states and 847945 transitions. [2021-08-06 19:44:02,235 INFO L78 Accepts]: Start accepts. Automaton has 347613 states and 847945 transitions. Word has length 33 [2021-08-06 19:44:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:02,235 INFO L470 AbstractCegarLoop]: Abstraction has 347613 states and 847945 transitions. [2021-08-06 19:44:02,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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 19:44:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 347613 states and 847945 transitions. [2021-08-06 19:44:03,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:44:03,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:03,291 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:03,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-06 19:44:03,500 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,SelfDestructingSolverStorable38 [2021-08-06 19:44:03,501 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:44:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:03,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1091841945, now seen corresponding path program 10 times [2021-08-06 19:44:03,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:03,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970281167] [2021-08-06 19:44:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:03,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:03,535 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 19:44:03,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:03,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970281167] [2021-08-06 19:44:03,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970281167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:03,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516432765] [2021-08-06 19:44:03,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:44:03,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:03,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:03,538 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 19:44:03,538 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 19:44:03,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:44:03,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:44:03,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:44:03,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:04,071 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 19:44:04,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516432765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:04,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:04,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 19:44:04,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566000416] [2021-08-06 19:44:04,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:44:04,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:04,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:44:04,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:44:04,073 INFO L87 Difference]: Start difference. First operand 347613 states and 847945 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 19:44:06,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:06,662 INFO L93 Difference]: Finished difference Result 371295 states and 894272 transitions. [2021-08-06 19:44:06,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:44:06,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 33 [2021-08-06 19:44:06,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:08,481 INFO L225 Difference]: With dead ends: 371295 [2021-08-06 19:44:08,481 INFO L226 Difference]: Without dead ends: 371295 [2021-08-06 19:44:08,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:44:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371295 states. [2021-08-06 19:44:15,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371295 to 347983. [2021-08-06 19:44:15,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347983 states, 347982 states have (on average 2.4390543189015523) internal successors, (848747), 347982 states have internal predecessors, (848747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347983 states to 347983 states and 848747 transitions. [2021-08-06 19:44:18,437 INFO L78 Accepts]: Start accepts. Automaton has 347983 states and 848747 transitions. Word has length 33 [2021-08-06 19:44:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:18,437 INFO L470 AbstractCegarLoop]: Abstraction has 347983 states and 848747 transitions. [2021-08-06 19:44:18,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 19:44:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 347983 states and 848747 transitions. [2021-08-06 19:44:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:44:19,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:19,731 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:19,750 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 19:44:19,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 19:44:19,948 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:44:19,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:19,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1314386007, now seen corresponding path program 11 times [2021-08-06 19:44:19,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:19,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547274206] [2021-08-06 19:44:19,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:19,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:20,044 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 19:44:20,046 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 19:44:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:44:20,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:20,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547274206] [2021-08-06 19:44:20,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547274206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:20,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543075389] [2021-08-06 19:44:20,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:44:20,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:20,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:20,055 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 19:44:20,056 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 19:44:20,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:44:20,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:44:20,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:44:20,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:21,333 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 82.0 percent of original size [2021-08-06 19:44:21,335 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 82.0 percent of original size [2021-08-06 19:44:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:21,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543075389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:21,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:21,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-08-06 19:44:21,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212615987] [2021-08-06 19:44:21,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:44:21,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:21,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:44:21,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:44:21,377 INFO L87 Difference]: Start difference. First operand 347983 states and 848747 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:24,512 INFO L93 Difference]: Finished difference Result 349274 states and 851225 transitions. [2021-08-06 19:44:24,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:44:24,521 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:44:24,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:26,125 INFO L225 Difference]: With dead ends: 349274 [2021-08-06 19:44:26,125 INFO L226 Difference]: Without dead ends: 349264 [2021-08-06 19:44:26,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:44:26,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349264 states. [2021-08-06 19:44:32,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349264 to 348091. [2021-08-06 19:44:33,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348091 states, 348090 states have (on average 2.4396161912149155) internal successors, (849206), 348090 states have internal predecessors, (849206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:35,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348091 states to 348091 states and 849206 transitions. [2021-08-06 19:44:35,989 INFO L78 Accepts]: Start accepts. Automaton has 348091 states and 849206 transitions. Word has length 35 [2021-08-06 19:44:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:35,990 INFO L470 AbstractCegarLoop]: Abstraction has 348091 states and 849206 transitions. [2021-08-06 19:44:35,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:35,990 INFO L276 IsEmpty]: Start isEmpty. Operand 348091 states and 849206 transitions. [2021-08-06 19:44:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:44:37,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:37,590 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:37,612 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 19:44:37,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:37,809 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:44:37,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:37,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1183979611, now seen corresponding path program 12 times [2021-08-06 19:44:37,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:37,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404000830] [2021-08-06 19:44:37,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:37,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:37,923 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 19:44:37,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 19:44:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:44:37,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:37,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404000830] [2021-08-06 19:44:37,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404000830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:37,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214673961] [2021-08-06 19:44:37,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:44:37,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:37,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:37,963 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 19:44:37,964 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 19:44:38,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:44:38,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:44:38,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:44:38,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:39,496 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 86.8 percent of original size [2021-08-06 19:44:39,500 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 86.8 percent of original size [2021-08-06 19:44:39,525 INFO L898 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-06 19:44:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:39,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214673961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:39,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:39,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-08-06 19:44:39,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119989960] [2021-08-06 19:44:39,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:44:39,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:39,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:44:39,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:44:39,549 INFO L87 Difference]: Start difference. First operand 348091 states and 849206 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:42,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:42,334 INFO L93 Difference]: Finished difference Result 349592 states and 852067 transitions. [2021-08-06 19:44:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:44:42,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:44:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:44,027 INFO L225 Difference]: With dead ends: 349592 [2021-08-06 19:44:44,027 INFO L226 Difference]: Without dead ends: 349572 [2021-08-06 19:44:44,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:44:44,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349572 states. [2021-08-06 19:44:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349572 to 348161. [2021-08-06 19:44:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348161 states, 348160 states have (on average 2.4399270450367645) internal successors, (849485), 348160 states have internal predecessors, (849485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:53,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348161 states to 348161 states and 849485 transitions. [2021-08-06 19:44:53,999 INFO L78 Accepts]: Start accepts. Automaton has 348161 states and 849485 transitions. Word has length 35 [2021-08-06 19:44:54,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:54,000 INFO L470 AbstractCegarLoop]: Abstraction has 348161 states and 849485 transitions. [2021-08-06 19:44:54,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:54,000 INFO L276 IsEmpty]: Start isEmpty. Operand 348161 states and 849485 transitions. [2021-08-06 19:44:55,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:44:55,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:55,352 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:55,370 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 19:44:55,570 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,SelfDestructingSolverStorable41 [2021-08-06 19:44:55,570 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:44:55,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:55,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1773909715, now seen corresponding path program 1 times [2021-08-06 19:44:55,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:55,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834151834] [2021-08-06 19:44:55,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:55,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:55,655 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:44:55,657 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:44:55,664 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:44:55,665 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:44:55,684 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:44:55,686 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:44:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:44:55,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:55,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834151834] [2021-08-06 19:44:55,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834151834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:55,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107652770] [2021-08-06 19:44:55,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:55,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:55,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:55,697 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 19:44:55,698 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 19:44:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:56,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:44:56,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:57,173 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.7 percent of original size [2021-08-06 19:44:57,175 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.7 percent of original size [2021-08-06 19:44:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:57,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107652770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:57,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:57,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-08-06 19:44:57,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359893660] [2021-08-06 19:44:57,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:44:57,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:57,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:44:57,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:44:57,217 INFO L87 Difference]: Start difference. First operand 348161 states and 849485 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:00,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:45:00,135 INFO L93 Difference]: Finished difference Result 349572 states and 852087 transitions. [2021-08-06 19:45:00,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:45:00,139 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:45:00,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:45:01,463 INFO L225 Difference]: With dead ends: 349572 [2021-08-06 19:45:01,464 INFO L226 Difference]: Without dead ends: 349552 [2021-08-06 19:45:01,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:45:02,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349552 states. [2021-08-06 19:45:08,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349552 to 348239. [2021-08-06 19:45:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348239 states, 348238 states have (on average 2.4403109367731264) internal successors, (849809), 348238 states have internal predecessors, (849809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348239 states to 348239 states and 849809 transitions. [2021-08-06 19:45:11,848 INFO L78 Accepts]: Start accepts. Automaton has 348239 states and 849809 transitions. Word has length 35 [2021-08-06 19:45:11,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:45:11,851 INFO L470 AbstractCegarLoop]: Abstraction has 348239 states and 849809 transitions. [2021-08-06 19:45:11,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:11,851 INFO L276 IsEmpty]: Start isEmpty. Operand 348239 states and 849809 transitions. [2021-08-06 19:45:13,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:45:13,278 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:45:13,278 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:45:13,297 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 19:45:13,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:13,485 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:45:13,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:45:13,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1433786025, now seen corresponding path program 1 times [2021-08-06 19:45:13,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:45:13,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010595483] [2021-08-06 19:45:13,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:45:13,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:45:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:45:13,547 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:45:13,548 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:45:13,555 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:45:13,556 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:45:13,571 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:45:13,573 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:45:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:45:13,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:45:13,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010595483] [2021-08-06 19:45:13,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010595483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:13,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745545067] [2021-08-06 19:45:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:45:13,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:13,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:45:13,583 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 19:45:13,604 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 19:45:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:45:14,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:45:14,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:45:15,116 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.3 percent of original size [2021-08-06 19:45:15,118 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.3 percent of original size [2021-08-06 19:45:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:15,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745545067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:15,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:45:15,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-08-06 19:45:15,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381904682] [2021-08-06 19:45:15,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:45:15,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:45:15,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:45:15,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:45:15,136 INFO L87 Difference]: Start difference. First operand 348239 states and 849809 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:17,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:45:17,954 INFO L93 Difference]: Finished difference Result 349322 states and 851858 transitions. [2021-08-06 19:45:17,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:45:17,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:45:17,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:45:19,775 INFO L225 Difference]: With dead ends: 349322 [2021-08-06 19:45:19,775 INFO L226 Difference]: Without dead ends: 349298 [2021-08-06 19:45:19,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:45:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349298 states. [2021-08-06 19:45:26,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349298 to 348278. [2021-08-06 19:45:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348278 states, 348277 states have (on average 2.4404540064374047) internal successors, (849954), 348277 states have internal predecessors, (849954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348278 states to 348278 states and 849954 transitions. [2021-08-06 19:45:30,035 INFO L78 Accepts]: Start accepts. Automaton has 348278 states and 849954 transitions. Word has length 35 [2021-08-06 19:45:30,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:45:30,035 INFO L470 AbstractCegarLoop]: Abstraction has 348278 states and 849954 transitions. [2021-08-06 19:45:30,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:30,035 INFO L276 IsEmpty]: Start isEmpty. Operand 348278 states and 849954 transitions. [2021-08-06 19:45:31,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:45:31,447 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:45:31,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:45:31,469 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 19:45:31,665 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,SelfDestructingSolverStorable43 [2021-08-06 19:45:31,665 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:45:31,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:45:31,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1318480663, now seen corresponding path program 2 times [2021-08-06 19:45:31,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:45:31,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649459881] [2021-08-06 19:45:31,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:45:31,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:45:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:45:31,720 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:45:31,721 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:45:31,727 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:45:31,728 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:45:31,754 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:45:31,756 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:45:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:45:31,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:45:31,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649459881] [2021-08-06 19:45:31,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649459881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:31,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957087930] [2021-08-06 19:45:31,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:45:31,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:31,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:45:31,768 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 19:45:31,769 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 19:45:32,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:45:32,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:45:32,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:45:32,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:45:33,299 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.6 percent of original size [2021-08-06 19:45:33,303 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.6 percent of original size [2021-08-06 19:45:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:33,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957087930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:33,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:45:33,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-08-06 19:45:33,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086870629] [2021-08-06 19:45:33,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:45:33,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:45:33,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:45:33,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:45:33,325 INFO L87 Difference]: Start difference. First operand 348278 states and 849954 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:36,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:45:36,078 INFO L93 Difference]: Finished difference Result 349425 states and 852018 transitions. [2021-08-06 19:45:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:45:36,080 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:45:36,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:45:37,840 INFO L225 Difference]: With dead ends: 349425 [2021-08-06 19:45:37,840 INFO L226 Difference]: Without dead ends: 349405 [2021-08-06 19:45:37,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:45:38,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349405 states. [2021-08-06 19:45:44,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349405 to 348292. [2021-08-06 19:45:45,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348292 states, 348291 states have (on average 2.44059995808103) internal successors, (850039), 348291 states have internal predecessors, (850039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:48,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348292 states to 348292 states and 850039 transitions. [2021-08-06 19:45:48,166 INFO L78 Accepts]: Start accepts. Automaton has 348292 states and 850039 transitions. Word has length 35 [2021-08-06 19:45:48,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:45:48,167 INFO L470 AbstractCegarLoop]: Abstraction has 348292 states and 850039 transitions. [2021-08-06 19:45:48,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:48,167 INFO L276 IsEmpty]: Start isEmpty. Operand 348292 states and 850039 transitions. [2021-08-06 19:45:49,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:45:49,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:45:49,643 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:45:49,662 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 19:45:49,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:49,856 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:45:49,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:45:49,856 INFO L82 PathProgramCache]: Analyzing trace with hash 273342765, now seen corresponding path program 2 times [2021-08-06 19:45:49,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:45:49,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916040037] [2021-08-06 19:45:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:45:49,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:45:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:45:49,911 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:45:49,912 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:45:49,918 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:45:49,925 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:45:49,942 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:45:49,945 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:45:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:45:49,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:45:49,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916040037] [2021-08-06 19:45:49,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916040037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:49,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46150106] [2021-08-06 19:45:49,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:45:49,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:49,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:45:49,955 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 19:45:49,957 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 19:45:50,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:45:50,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:45:50,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:45:50,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:45:51,614 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.6 percent of original size [2021-08-06 19:45:51,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.6 percent of original size [2021-08-06 19:45:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:51,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46150106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:51,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:45:51,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-08-06 19:45:51,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332148639] [2021-08-06 19:45:51,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:45:51,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:45:51,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:45:51,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:45:51,635 INFO L87 Difference]: Start difference. First operand 348292 states and 850039 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:54,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:45:54,509 INFO L93 Difference]: Finished difference Result 349623 states and 852483 transitions. [2021-08-06 19:45:54,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:45:54,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:45:54,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:45:56,329 INFO L225 Difference]: With dead ends: 349623 [2021-08-06 19:45:56,329 INFO L226 Difference]: Without dead ends: 349603 [2021-08-06 19:45:56,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:45:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349603 states. [2021-08-06 19:46:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349603 to 348355. [2021-08-06 19:46:03,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348355 states, 348354 states have (on average 2.4408934589526745) internal successors, (850295), 348354 states have internal predecessors, (850295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:05,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348355 states to 348355 states and 850295 transitions. [2021-08-06 19:46:05,909 INFO L78 Accepts]: Start accepts. Automaton has 348355 states and 850295 transitions. Word has length 35 [2021-08-06 19:46:05,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:05,909 INFO L470 AbstractCegarLoop]: Abstraction has 348355 states and 850295 transitions. [2021-08-06 19:46:05,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:05,909 INFO L276 IsEmpty]: Start isEmpty. Operand 348355 states and 850295 transitions. [2021-08-06 19:46:07,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:46:07,423 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:07,423 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:07,444 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 19:46:07,636 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,SelfDestructingSolverStorable45 [2021-08-06 19:46:07,637 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:46:07,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:07,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1443500333, now seen corresponding path program 3 times [2021-08-06 19:46:07,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:07,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074880567] [2021-08-06 19:46:07,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:07,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:07,725 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:46:07,726 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:46:07,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:46:07,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:46:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:07,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:07,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074880567] [2021-08-06 19:46:07,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074880567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:07,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463469851] [2021-08-06 19:46:07,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:46:07,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:07,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:07,755 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 19:46:07,757 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 19:46:08,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 19:46:08,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:08,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:46:08,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:09,625 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 93.2 percent of original size [2021-08-06 19:46:09,627 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 93.2 percent of original size [2021-08-06 19:46:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:09,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463469851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:09,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:09,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-08-06 19:46:09,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765141035] [2021-08-06 19:46:09,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:46:09,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:09,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:46:09,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:46:09,677 INFO L87 Difference]: Start difference. First operand 348355 states and 850295 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:12,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:12,220 INFO L93 Difference]: Finished difference Result 349682 states and 852692 transitions. [2021-08-06 19:46:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:46:12,221 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:46:12,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:13,894 INFO L225 Difference]: With dead ends: 349682 [2021-08-06 19:46:13,894 INFO L226 Difference]: Without dead ends: 349662 [2021-08-06 19:46:13,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:46:14,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349662 states. [2021-08-06 19:46:20,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349662 to 348307. [2021-08-06 19:46:20,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348307 states, 348306 states have (on average 2.440649888316595) internal successors, (850093), 348306 states have internal predecessors, (850093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348307 states to 348307 states and 850093 transitions. [2021-08-06 19:46:23,838 INFO L78 Accepts]: Start accepts. Automaton has 348307 states and 850093 transitions. Word has length 35 [2021-08-06 19:46:23,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:23,839 INFO L470 AbstractCegarLoop]: Abstraction has 348307 states and 850093 transitions. [2021-08-06 19:46:23,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,839 INFO L276 IsEmpty]: Start isEmpty. Operand 348307 states and 850093 transitions. [2021-08-06 19:46:25,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:46:25,341 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:25,341 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:25,364 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 19:46:25,562 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,SelfDestructingSolverStorable46 [2021-08-06 19:46:25,562 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:46:25,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:25,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1796895387, now seen corresponding path program 3 times [2021-08-06 19:46:25,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:25,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660447503] [2021-08-06 19:46:25,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:25,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:25,647 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:46:25,648 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:46:25,656 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:46:25,658 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:46:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:25,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:25,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660447503] [2021-08-06 19:46:25,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660447503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:25,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149185440] [2021-08-06 19:46:25,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:46:25,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:25,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:25,667 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 19:46:25,668 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 19:46:26,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 19:46:26,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:26,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:46:26,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:27,447 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 93.2 percent of original size [2021-08-06 19:46:27,450 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 93.2 percent of original size [2021-08-06 19:46:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:27,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149185440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:27,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:27,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-08-06 19:46:27,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565136967] [2021-08-06 19:46:27,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:46:27,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:27,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:46:27,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:46:27,598 INFO L87 Difference]: Start difference. First operand 348307 states and 850093 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:30,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:30,244 INFO L93 Difference]: Finished difference Result 349026 states and 851527 transitions. [2021-08-06 19:46:30,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:46:30,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:46:30,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:31,943 INFO L225 Difference]: With dead ends: 349026 [2021-08-06 19:46:31,944 INFO L226 Difference]: Without dead ends: 349016 [2021-08-06 19:46:31,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:46:32,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349016 states. [2021-08-06 19:46:38,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349016 to 348401. [2021-08-06 19:46:39,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348401 states, 348400 states have (on average 2.4408840413318025) internal successors, (850404), 348400 states have internal predecessors, (850404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348401 states to 348401 states and 850404 transitions. [2021-08-06 19:46:41,666 INFO L78 Accepts]: Start accepts. Automaton has 348401 states and 850404 transitions. Word has length 35 [2021-08-06 19:46:41,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:41,667 INFO L470 AbstractCegarLoop]: Abstraction has 348401 states and 850404 transitions. [2021-08-06 19:46:41,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:41,667 INFO L276 IsEmpty]: Start isEmpty. Operand 348401 states and 850404 transitions. [2021-08-06 19:46:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:46:43,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:43,132 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:43,154 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 19:46:43,352 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,SelfDestructingSolverStorable47 [2021-08-06 19:46:43,352 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:46:43,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:43,352 INFO L82 PathProgramCache]: Analyzing trace with hash -269840471, now seen corresponding path program 4 times [2021-08-06 19:46:43,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:43,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276809223] [2021-08-06 19:46:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:43,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:43,452 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:46:43,453 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:46:43,476 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:46:43,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:46:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:43,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:43,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276809223] [2021-08-06 19:46:43,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276809223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:43,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65142692] [2021-08-06 19:46:43,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:46:43,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:43,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:43,493 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 19:46:43,520 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 19:46:44,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:46:44,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:44,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:46:44,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:45,454 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.7 percent of original size [2021-08-06 19:46:45,457 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.7 percent of original size [2021-08-06 19:46:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:45,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65142692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:45,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:45,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-08-06 19:46:45,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805234155] [2021-08-06 19:46:45,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:46:45,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:45,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:46:45,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:46:45,485 INFO L87 Difference]: Start difference. First operand 348401 states and 850404 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:47,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:47,970 INFO L93 Difference]: Finished difference Result 349403 states and 852262 transitions. [2021-08-06 19:46:47,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:46:47,970 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:46:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:49,686 INFO L225 Difference]: With dead ends: 349403 [2021-08-06 19:46:49,686 INFO L226 Difference]: Without dead ends: 349375 [2021-08-06 19:46:49,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:46:50,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349375 states. [2021-08-06 19:46:56,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349375 to 348298. [2021-08-06 19:46:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348298 states, 348297 states have (on average 2.44051771907309) internal successors, (850025), 348297 states have internal predecessors, (850025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348298 states to 348298 states and 850025 transitions. [2021-08-06 19:46:59,655 INFO L78 Accepts]: Start accepts. Automaton has 348298 states and 850025 transitions. Word has length 35 [2021-08-06 19:46:59,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:59,656 INFO L470 AbstractCegarLoop]: Abstraction has 348298 states and 850025 transitions. [2021-08-06 19:46:59,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:59,656 INFO L276 IsEmpty]: Start isEmpty. Operand 348298 states and 850025 transitions. [2021-08-06 19:47:01,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:47:01,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:01,028 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:01,048 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 19:47:01,247 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,SelfDestructingSolverStorable48 [2021-08-06 19:47:01,248 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:47:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:01,248 INFO L82 PathProgramCache]: Analyzing trace with hash -82887191, now seen corresponding path program 5 times [2021-08-06 19:47:01,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:01,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137585527] [2021-08-06 19:47:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:01,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:01,355 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:47:01,357 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:47:01,366 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:47:01,368 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:47:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:01,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:01,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137585527] [2021-08-06 19:47:01,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137585527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:01,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471957463] [2021-08-06 19:47:01,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:47:01,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:01,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:01,393 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 19:47:01,444 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 19:47:02,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:47:02,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:02,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:47:02,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:03,410 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.7 percent of original size [2021-08-06 19:47:03,413 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.7 percent of original size [2021-08-06 19:47:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:03,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471957463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:03,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:03,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-08-06 19:47:03,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426013467] [2021-08-06 19:47:03,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:47:03,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:03,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:47:03,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:47:03,471 INFO L87 Difference]: Start difference. First operand 348298 states and 850025 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:06,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:06,095 INFO L93 Difference]: Finished difference Result 349047 states and 851439 transitions. [2021-08-06 19:47:06,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:47:06,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:47:06,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:07,914 INFO L225 Difference]: With dead ends: 349047 [2021-08-06 19:47:07,914 INFO L226 Difference]: Without dead ends: 349037 [2021-08-06 19:47:07,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:47:08,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349037 states. [2021-08-06 19:47:14,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349037 to 348392. [2021-08-06 19:47:15,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348392 states, 348391 states have (on average 2.4407174697394596) internal successors, (850324), 348391 states have internal predecessors, (850324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348392 states to 348392 states and 850324 transitions. [2021-08-06 19:47:17,661 INFO L78 Accepts]: Start accepts. Automaton has 348392 states and 850324 transitions. Word has length 35 [2021-08-06 19:47:17,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:17,661 INFO L470 AbstractCegarLoop]: Abstraction has 348392 states and 850324 transitions. [2021-08-06 19:47:17,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:17,661 INFO L276 IsEmpty]: Start isEmpty. Operand 348392 states and 850324 transitions. [2021-08-06 19:47:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:47:19,347 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:19,347 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:19,368 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 19:47:19,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 19:47:19,568 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:47:19,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:19,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1564788247, now seen corresponding path program 6 times [2021-08-06 19:47:19,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:19,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464879260] [2021-08-06 19:47:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:19,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:19,658 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:47:19,660 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:47:19,676 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:47:19,677 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:47:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:19,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:19,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464879260] [2021-08-06 19:47:19,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464879260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:19,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391252270] [2021-08-06 19:47:19,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:47:19,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:19,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:19,689 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 19:47:19,690 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 19:47:21,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 19:47:21,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:21,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:47:21,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:21,750 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.7 percent of original size [2021-08-06 19:47:21,753 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.7 percent of original size [2021-08-06 19:47:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:21,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391252270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:21,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:21,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-08-06 19:47:21,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067453462] [2021-08-06 19:47:21,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:47:21,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:21,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:47:21,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:47:21,785 INFO L87 Difference]: Start difference. First operand 348392 states and 850324 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:24,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:24,597 INFO L93 Difference]: Finished difference Result 349479 states and 852222 transitions. [2021-08-06 19:47:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:47:24,597 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:47:24,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:25,969 INFO L225 Difference]: With dead ends: 349479 [2021-08-06 19:47:25,969 INFO L226 Difference]: Without dead ends: 349459 [2021-08-06 19:47:25,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:47:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349459 states. [2021-08-06 19:47:32,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349459 to 348292. [2021-08-06 19:47:32,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348292 states, 348291 states have (on average 2.4403817497437488) internal successors, (849963), 348291 states have internal predecessors, (849963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348292 states to 348292 states and 849963 transitions. [2021-08-06 19:47:35,759 INFO L78 Accepts]: Start accepts. Automaton has 348292 states and 849963 transitions. Word has length 35 [2021-08-06 19:47:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:35,759 INFO L470 AbstractCegarLoop]: Abstraction has 348292 states and 849963 transitions. [2021-08-06 19:47:35,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 348292 states and 849963 transitions. [2021-08-06 19:47:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:47:37,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:37,276 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:37,300 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 19:47:37,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:37,483 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:47:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:37,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1300706651, now seen corresponding path program 4 times [2021-08-06 19:47:37,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:37,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714934845] [2021-08-06 19:47:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:37,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:37,578 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:47:37,579 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:47:37,588 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:47:37,590 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:47:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:37,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:37,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714934845] [2021-08-06 19:47:37,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714934845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:37,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025258407] [2021-08-06 19:47:37,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:47:37,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:37,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:37,600 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 19:47:37,602 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 19:47:38,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:47:38,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:38,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:47:38,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:39,741 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 93.2 percent of original size [2021-08-06 19:47:39,744 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 93.2 percent of original size [2021-08-06 19:47:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:39,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025258407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:39,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:39,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-08-06 19:47:39,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689622057] [2021-08-06 19:47:39,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:47:39,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:39,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:47:39,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:47:39,782 INFO L87 Difference]: Start difference. First operand 348292 states and 849963 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:42,249 INFO L93 Difference]: Finished difference Result 349197 states and 851735 transitions. [2021-08-06 19:47:42,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:47:42,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:47:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:43,896 INFO L225 Difference]: With dead ends: 349197 [2021-08-06 19:47:43,897 INFO L226 Difference]: Without dead ends: 349187 [2021-08-06 19:47:43,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:47:44,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349187 states. [2021-08-06 19:47:50,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349187 to 348480. [2021-08-06 19:47:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348480 states, 348479 states have (on average 2.4410739241102046) internal successors, (850663), 348479 states have internal predecessors, (850663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:53,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348480 states to 348480 states and 850663 transitions. [2021-08-06 19:47:53,963 INFO L78 Accepts]: Start accepts. Automaton has 348480 states and 850663 transitions. Word has length 35 [2021-08-06 19:47:53,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:53,963 INFO L470 AbstractCegarLoop]: Abstraction has 348480 states and 850663 transitions. [2021-08-06 19:47:53,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:53,963 INFO L276 IsEmpty]: Start isEmpty. Operand 348480 states and 850663 transitions. [2021-08-06 19:47:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:47:55,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:55,689 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:55,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:55,909 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,SelfDestructingSolverStorable51 [2021-08-06 19:47:55,910 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:47:55,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:55,910 INFO L82 PathProgramCache]: Analyzing trace with hash 82995945, now seen corresponding path program 5 times [2021-08-06 19:47:55,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:55,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286385857] [2021-08-06 19:47:55,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:55,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:55,995 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:47:55,997 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:47:56,013 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:47:56,014 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:47:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:56,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:56,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286385857] [2021-08-06 19:47:56,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286385857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:56,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332066223] [2021-08-06 19:47:56,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:47:56,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:56,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:56,029 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 19:47:56,072 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 19:47:57,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:47:57,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:57,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:47:57,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:58,341 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 93.7 percent of original size [2021-08-06 19:47:58,343 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 93.7 percent of original size [2021-08-06 19:47:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:58,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332066223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:58,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:58,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-08-06 19:47:58,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443225639] [2021-08-06 19:47:58,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:47:58,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:58,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:47:58,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:47:58,389 INFO L87 Difference]: Start difference. First operand 348480 states and 850663 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:01,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:01,050 INFO L93 Difference]: Finished difference Result 349674 states and 852838 transitions. [2021-08-06 19:48:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:48:01,050 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:48:01,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:02,477 INFO L225 Difference]: With dead ends: 349674 [2021-08-06 19:48:02,478 INFO L226 Difference]: Without dead ends: 349654 [2021-08-06 19:48:02,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:48:03,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349654 states. [2021-08-06 19:48:09,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349654 to 348237. [2021-08-06 19:48:10,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348237 states, 348236 states have (on average 2.44011819570636) internal successors, (849737), 348236 states have internal predecessors, (849737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:12,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348237 states to 348237 states and 849737 transitions. [2021-08-06 19:48:12,827 INFO L78 Accepts]: Start accepts. Automaton has 348237 states and 849737 transitions. Word has length 35 [2021-08-06 19:48:12,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:12,827 INFO L470 AbstractCegarLoop]: Abstraction has 348237 states and 849737 transitions. [2021-08-06 19:48:12,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:12,827 INFO L276 IsEmpty]: Start isEmpty. Operand 348237 states and 849737 transitions. [2021-08-06 19:48:14,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:48:14,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:14,354 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:14,374 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 19:48:14,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:14,573 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:48:14,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:14,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1962311021, now seen corresponding path program 6 times [2021-08-06 19:48:14,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:14,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521100156] [2021-08-06 19:48:14,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:14,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:14,649 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:48:14,650 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:48:14,659 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:48:14,660 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:48:14,691 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:48:14,693 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:48:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:48:14,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:14,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521100156] [2021-08-06 19:48:14,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521100156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:14,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599381890] [2021-08-06 19:48:14,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:48:14,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:14,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:48:14,704 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 19:48:14,705 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 19:48:16,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 19:48:16,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:48:16,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:48:16,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:48:17,045 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.3 percent of original size [2021-08-06 19:48:17,047 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.3 percent of original size [2021-08-06 19:48:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:17,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599381890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:17,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:48:17,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-08-06 19:48:17,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221649383] [2021-08-06 19:48:17,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:48:17,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:17,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:48:17,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:48:17,076 INFO L87 Difference]: Start difference. First operand 348237 states and 849737 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:19,737 INFO L93 Difference]: Finished difference Result 349689 states and 852504 transitions. [2021-08-06 19:48:19,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:48:19,740 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:48:19,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:21,167 INFO L225 Difference]: With dead ends: 349689 [2021-08-06 19:48:21,167 INFO L226 Difference]: Without dead ends: 349669 [2021-08-06 19:48:21,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:48:21,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349669 states. [2021-08-06 19:48:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349669 to 348351. [2021-08-06 19:48:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348351 states, 348350 states have (on average 2.4405167216879575) internal successors, (850154), 348350 states have internal predecessors, (850154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348351 states to 348351 states and 850154 transitions. [2021-08-06 19:48:31,274 INFO L78 Accepts]: Start accepts. Automaton has 348351 states and 850154 transitions. Word has length 35 [2021-08-06 19:48:31,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:31,274 INFO L470 AbstractCegarLoop]: Abstraction has 348351 states and 850154 transitions. [2021-08-06 19:48:31,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand 348351 states and 850154 transitions. [2021-08-06 19:48:32,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:48:32,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:32,803 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:32,825 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 19:48:33,024 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,SelfDestructingSolverStorable53 [2021-08-06 19:48:33,024 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:48:33,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:33,024 INFO L82 PathProgramCache]: Analyzing trace with hash 875039465, now seen corresponding path program 7 times [2021-08-06 19:48:33,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:33,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123557044] [2021-08-06 19:48:33,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:33,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:33,102 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:48:33,103 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:48:33,125 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:48:33,127 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:48:33,142 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:48:33,143 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:48:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:48:33,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:33,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123557044] [2021-08-06 19:48:33,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123557044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:33,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624268092] [2021-08-06 19:48:33,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:48:33,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:33,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:48:33,173 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 19:48:33,224 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 19:48:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:34,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:48:34,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:48:35,420 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.3 percent of original size [2021-08-06 19:48:35,422 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.3 percent of original size [2021-08-06 19:48:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:35,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624268092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:35,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:48:35,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-08-06 19:48:35,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915886361] [2021-08-06 19:48:35,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:48:35,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:35,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:48:35,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:48:35,442 INFO L87 Difference]: Start difference. First operand 348351 states and 850154 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:37,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:37,893 INFO L93 Difference]: Finished difference Result 349485 states and 852361 transitions. [2021-08-06 19:48:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:48:37,893 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:48:37,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:39,626 INFO L225 Difference]: With dead ends: 349485 [2021-08-06 19:48:39,626 INFO L226 Difference]: Without dead ends: 349461 [2021-08-06 19:48:39,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:48:40,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349461 states. [2021-08-06 19:48:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349461 to 348400. [2021-08-06 19:48:46,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348400 states, 348399 states have (on average 2.440626982281809) internal successors, (850312), 348399 states have internal predecessors, (850312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:48,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348400 states to 348400 states and 850312 transitions. [2021-08-06 19:48:48,994 INFO L78 Accepts]: Start accepts. Automaton has 348400 states and 850312 transitions. Word has length 35 [2021-08-06 19:48:48,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:48,994 INFO L470 AbstractCegarLoop]: Abstraction has 348400 states and 850312 transitions. [2021-08-06 19:48:48,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:48,994 INFO L276 IsEmpty]: Start isEmpty. Operand 348400 states and 850312 transitions. [2021-08-06 19:48:50,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:48:50,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:50,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:50,487 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 19:48:50,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:50,673 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:48:50,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:50,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1877227223, now seen corresponding path program 8 times [2021-08-06 19:48:50,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:50,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640147290] [2021-08-06 19:48:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:50,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:50,744 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:48:50,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:48:50,752 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:48:50,754 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:48:50,768 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:48:50,770 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:48:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 19:48:50,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:50,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640147290] [2021-08-06 19:48:50,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640147290] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:50,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:50,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 19:48:50,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657323632] [2021-08-06 19:48:50,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:48:50,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:50,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:48:50,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:48:50,784 INFO L87 Difference]: Start difference. First operand 348400 states and 850312 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 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 19:48:53,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:53,723 INFO L93 Difference]: Finished difference Result 349224 states and 851878 transitions. [2021-08-06 19:48:53,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:48:53,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 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 35 [2021-08-06 19:48:53,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:55,908 INFO L225 Difference]: With dead ends: 349224 [2021-08-06 19:48:55,909 INFO L226 Difference]: Without dead ends: 349214 [2021-08-06 19:48:55,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:48:56,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349214 states. [2021-08-06 19:49:02,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349214 to 348424. [2021-08-06 19:49:02,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348424 states, 348423 states have (on average 2.4407401348361044) internal successors, (850410), 348423 states have internal predecessors, (850410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:49:05,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348424 states to 348424 states and 850410 transitions. [2021-08-06 19:49:05,519 INFO L78 Accepts]: Start accepts. Automaton has 348424 states and 850410 transitions. Word has length 35 [2021-08-06 19:49:05,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:49:05,519 INFO L470 AbstractCegarLoop]: Abstraction has 348424 states and 850410 transitions. [2021-08-06 19:49:05,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 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 19:49:05,519 INFO L276 IsEmpty]: Start isEmpty. Operand 348424 states and 850410 transitions. [2021-08-06 19:49:07,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:49:07,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:49:07,095 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:49:07,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-08-06 19:49:07,095 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:49:07,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:49:07,096 INFO L82 PathProgramCache]: Analyzing trace with hash -285403795, now seen corresponding path program 7 times [2021-08-06 19:49:07,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:49:07,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980437970] [2021-08-06 19:49:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:49:07,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:49:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:49:07,165 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:49:07,166 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 60.0 percent of original size [2021-08-06 19:49:07,175 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:49:07,177 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 68.8 percent of original size [2021-08-06 19:49:07,193 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:49:07,194 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 54.1 percent of original size [2021-08-06 19:49:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:49:07,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:49:07,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980437970] [2021-08-06 19:49:07,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980437970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:07,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755763079] [2021-08-06 19:49:07,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:49:07,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:49:07,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:49:07,205 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 19:49:07,206 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 19:49:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:49:08,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:49:08,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:49:09,484 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 19:49:09,493 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 19:49:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:49:09,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755763079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:09,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:49:09,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-08-06 19:49:09,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801276762] [2021-08-06 19:49:09,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:49:09,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:49:09,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:49:09,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:49:09,512 INFO L87 Difference]: Start difference. First operand 348424 states and 850410 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:49:12,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:49:12,140 INFO L93 Difference]: Finished difference Result 349802 states and 853044 transitions. [2021-08-06 19:49:12,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:49:12,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:49:12,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:49:13,792 INFO L225 Difference]: With dead ends: 349802 [2021-08-06 19:49:13,793 INFO L226 Difference]: Without dead ends: 349782 [2021-08-06 19:49:13,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:49:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349782 states. [2021-08-06 19:49:20,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349782 to 348525. [2021-08-06 19:49:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348525 states, 348524 states have (on average 2.441062882326612) internal successors, (850769), 348524 states have internal predecessors, (850769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:49:23,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348525 states to 348525 states and 850769 transitions. [2021-08-06 19:49:23,423 INFO L78 Accepts]: Start accepts. Automaton has 348525 states and 850769 transitions. Word has length 35 [2021-08-06 19:49:23,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:49:23,423 INFO L470 AbstractCegarLoop]: Abstraction has 348525 states and 850769 transitions. [2021-08-06 19:49:23,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:49:23,423 INFO L276 IsEmpty]: Start isEmpty. Operand 348525 states and 850769 transitions. [2021-08-06 19:49:24,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:49:24,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:49:24,909 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:49:24,930 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 19:49:25,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:49:25,122 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:49:25,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:49:25,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1034401751, now seen corresponding path program 13 times [2021-08-06 19:49:25,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:49:25,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856526133] [2021-08-06 19:49:25,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:49:25,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:49:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:49:25,203 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 19:49:25,204 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 19:49:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:49:25,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:49:25,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856526133] [2021-08-06 19:49:25,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856526133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:25,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868440659] [2021-08-06 19:49:25,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:49:25,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:49:25,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:49:25,221 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 19:49:25,224 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 19:49:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:49:26,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:49:26,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:49:27,531 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 83.6 percent of original size [2021-08-06 19:49:27,533 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 83.6 percent of original size [2021-08-06 19:49:27,552 INFO L898 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-08-06 19:49:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:49:27,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868440659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:27,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:49:27,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-08-06 19:49:27,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865094975] [2021-08-06 19:49:27,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:49:27,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:49:27,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:49:27,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:49:27,597 INFO L87 Difference]: Start difference. First operand 348525 states and 850769 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:49:30,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:49:30,355 INFO L93 Difference]: Finished difference Result 349693 states and 852978 transitions. [2021-08-06 19:49:30,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:49:30,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:49:30,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:49:31,704 INFO L225 Difference]: With dead ends: 349693 [2021-08-06 19:49:31,704 INFO L226 Difference]: Without dead ends: 349683 [2021-08-06 19:49:31,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:49:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349683 states. [2021-08-06 19:49:38,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349683 to 348610. [2021-08-06 19:49:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348610 states, 348609 states have (on average 2.4414200436592286) internal successors, (851101), 348609 states have internal predecessors, (851101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:49:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348610 states to 348610 states and 851101 transitions. [2021-08-06 19:49:41,551 INFO L78 Accepts]: Start accepts. Automaton has 348610 states and 851101 transitions. Word has length 35 [2021-08-06 19:49:41,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:49:41,551 INFO L470 AbstractCegarLoop]: Abstraction has 348610 states and 851101 transitions. [2021-08-06 19:49:41,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:49:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 348610 states and 851101 transitions. [2021-08-06 19:49:42,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:49:42,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:49:42,946 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:49:42,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 19:49:43,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-06 19:49:43,161 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:49:43,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:49:43,161 INFO L82 PathProgramCache]: Analyzing trace with hash 225482541, now seen corresponding path program 8 times [2021-08-06 19:49:43,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:49:43,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687459469] [2021-08-06 19:49:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:49:43,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:49:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:49:43,265 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:49:43,266 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:49:43,297 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:49:43,299 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:49:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:49:43,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:49:43,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687459469] [2021-08-06 19:49:43,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687459469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:43,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343355282] [2021-08-06 19:49:43,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:49:43,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:49:43,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:49:43,321 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 19:49:43,368 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 19:49:45,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:49:45,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:49:45,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:49:45,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:49:45,921 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.7 percent of original size [2021-08-06 19:49:45,924 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.7 percent of original size [2021-08-06 19:49:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:49:45,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343355282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:49:45,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:49:45,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-08-06 19:49:45,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195225480] [2021-08-06 19:49:45,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:49:45,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:49:45,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:49:45,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:49:45,945 INFO L87 Difference]: Start difference. First operand 348610 states and 851101 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:49:48,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:49:48,833 INFO L93 Difference]: Finished difference Result 349882 states and 853452 transitions. [2021-08-06 19:49:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:49:48,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:49:48,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:49:50,252 INFO L225 Difference]: With dead ends: 349882 [2021-08-06 19:49:50,252 INFO L226 Difference]: Without dead ends: 349862 [2021-08-06 19:49:50,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:49:51,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349862 states. [2021-08-06 19:49:57,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349862 to 348502. [2021-08-06 19:49:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348502 states, 348501 states have (on average 2.441054688508785) internal successors, (850710), 348501 states have internal predecessors, (850710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:00,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348502 states to 348502 states and 850710 transitions. [2021-08-06 19:50:00,341 INFO L78 Accepts]: Start accepts. Automaton has 348502 states and 850710 transitions. Word has length 35 [2021-08-06 19:50:00,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:50:00,341 INFO L470 AbstractCegarLoop]: Abstraction has 348502 states and 850710 transitions. [2021-08-06 19:50:00,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:00,341 INFO L276 IsEmpty]: Start isEmpty. Operand 348502 states and 850710 transitions. [2021-08-06 19:50:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:50:01,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:50:01,871 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:50:01,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 19:50:02,083 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,SelfDestructingSolverStorable58 [2021-08-06 19:50:02,084 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:50:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:50:02,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1509084525, now seen corresponding path program 9 times [2021-08-06 19:50:02,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:50:02,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280032886] [2021-08-06 19:50:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:50:02,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:50:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:50:02,191 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:50:02,193 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:50:02,209 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:50:02,211 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:50:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:50:02,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:50:02,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280032886] [2021-08-06 19:50:02,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280032886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:50:02,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542990425] [2021-08-06 19:50:02,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:50:02,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:50:02,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:50:02,222 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 19:50:02,251 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 19:50:04,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:50:04,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:50:04,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:50:04,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:50:04,828 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 93.2 percent of original size [2021-08-06 19:50:04,830 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 93.2 percent of original size [2021-08-06 19:50:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:50:04,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542990425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:50:04,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:50:04,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-08-06 19:50:04,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406804467] [2021-08-06 19:50:04,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:50:04,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:50:04,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:50:04,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:50:04,855 INFO L87 Difference]: Start difference. First operand 348502 states and 850710 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:07,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:50:07,862 INFO L93 Difference]: Finished difference Result 349501 states and 852601 transitions. [2021-08-06 19:50:07,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:50:07,862 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:50:07,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:50:09,409 INFO L225 Difference]: With dead ends: 349501 [2021-08-06 19:50:09,409 INFO L226 Difference]: Without dead ends: 349473 [2021-08-06 19:50:09,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:50:10,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349473 states. [2021-08-06 19:50:16,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349473 to 348465. [2021-08-06 19:50:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348465 states, 348464 states have (on average 2.44093794480922) internal successors, (850579), 348464 states have internal predecessors, (850579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348465 states to 348465 states and 850579 transitions. [2021-08-06 19:50:20,023 INFO L78 Accepts]: Start accepts. Automaton has 348465 states and 850579 transitions. Word has length 35 [2021-08-06 19:50:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:50:20,023 INFO L470 AbstractCegarLoop]: Abstraction has 348465 states and 850579 transitions. [2021-08-06 19:50:20,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:20,024 INFO L276 IsEmpty]: Start isEmpty. Operand 348465 states and 850579 transitions. [2021-08-06 19:50:21,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:50:21,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:50:21,567 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:50:21,589 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 19:50:21,780 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,SelfDestructingSolverStorable59 [2021-08-06 19:50:21,781 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:50:21,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:50:21,781 INFO L82 PathProgramCache]: Analyzing trace with hash 198268589, now seen corresponding path program 9 times [2021-08-06 19:50:21,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:50:21,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527837130] [2021-08-06 19:50:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:50:21,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:50:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:50:21,876 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:50:21,878 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:50:21,889 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:50:21,890 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:50:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:50:21,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:50:21,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527837130] [2021-08-06 19:50:21,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527837130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:50:21,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161662450] [2021-08-06 19:50:21,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:50:21,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:50:21,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:50:21,904 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 19:50:21,905 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 19:50:23,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:50:23,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:50:23,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:50:23,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:50:24,635 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.7 percent of original size [2021-08-06 19:50:24,638 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.7 percent of original size [2021-08-06 19:50:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:50:24,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161662450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:50:24,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:50:24,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-08-06 19:50:24,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222839008] [2021-08-06 19:50:24,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:50:24,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:50:24,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:50:24,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:50:24,666 INFO L87 Difference]: Start difference. First operand 348465 states and 850579 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:27,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:50:27,422 INFO L93 Difference]: Finished difference Result 349375 states and 852370 transitions. [2021-08-06 19:50:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:50:27,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:50:27,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:50:28,825 INFO L225 Difference]: With dead ends: 349375 [2021-08-06 19:50:28,826 INFO L226 Difference]: Without dead ends: 349365 [2021-08-06 19:50:28,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:50:29,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349365 states. [2021-08-06 19:50:35,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349365 to 348579. [2021-08-06 19:50:36,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348579 states, 348578 states have (on average 2.441381842801324) internal successors, (851012), 348578 states have internal predecessors, (851012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348579 states to 348579 states and 851012 transitions. [2021-08-06 19:50:39,270 INFO L78 Accepts]: Start accepts. Automaton has 348579 states and 851012 transitions. Word has length 35 [2021-08-06 19:50:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:50:39,270 INFO L470 AbstractCegarLoop]: Abstraction has 348579 states and 851012 transitions. [2021-08-06 19:50:39,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:39,270 INFO L276 IsEmpty]: Start isEmpty. Operand 348579 states and 851012 transitions. [2021-08-06 19:50:40,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:50:40,825 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:50:40,825 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:50:40,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 19:50:41,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:50:41,042 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:50:41,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:50:41,042 INFO L82 PathProgramCache]: Analyzing trace with hash -308064535, now seen corresponding path program 10 times [2021-08-06 19:50:41,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:50:41,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481052786] [2021-08-06 19:50:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:50:41,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:50:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:50:41,109 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:50:41,110 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:50:41,126 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:50:41,128 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:50:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:50:41,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:50:41,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481052786] [2021-08-06 19:50:41,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481052786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:50:41,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571234842] [2021-08-06 19:50:41,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:50:41,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:50:41,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:50:41,138 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 19:50:41,139 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 19:50:43,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:50:43,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:50:43,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:50:43,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:50:43,898 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 93.2 percent of original size [2021-08-06 19:50:43,900 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 93.2 percent of original size [2021-08-06 19:50:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:50:43,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571234842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:50:43,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:50:43,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-08-06 19:50:43,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068528506] [2021-08-06 19:50:43,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:50:43,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:50:43,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:50:43,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:50:43,946 INFO L87 Difference]: Start difference. First operand 348579 states and 851012 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:46,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:50:46,585 INFO L93 Difference]: Finished difference Result 349750 states and 853212 transitions. [2021-08-06 19:50:46,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:50:46,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:50:46,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:50:48,311 INFO L225 Difference]: With dead ends: 349750 [2021-08-06 19:50:48,311 INFO L226 Difference]: Without dead ends: 349730 [2021-08-06 19:50:48,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:50:48,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349730 states. [2021-08-06 19:50:54,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349730 to 348356. [2021-08-06 19:50:55,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348356 states, 348355 states have (on average 2.4405678115715292) internal successors, (850184), 348355 states have internal predecessors, (850184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348356 states to 348356 states and 850184 transitions. [2021-08-06 19:50:58,257 INFO L78 Accepts]: Start accepts. Automaton has 348356 states and 850184 transitions. Word has length 35 [2021-08-06 19:50:58,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:50:58,258 INFO L470 AbstractCegarLoop]: Abstraction has 348356 states and 850184 transitions. [2021-08-06 19:50:58,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:50:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 348356 states and 850184 transitions. [2021-08-06 19:50:59,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:50:59,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:50:59,710 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:50:59,735 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 19:50:59,940 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,SelfDestructingSolverStorable61 [2021-08-06 19:50:59,940 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-06 19:50:59,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:50:59,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1928665875, now seen corresponding path program 10 times [2021-08-06 19:50:59,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:50:59,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506048765] [2021-08-06 19:50:59,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:50:59,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:50:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:51:00,041 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:51:00,043 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:51:00,052 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:51:00,053 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:51:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:51:00,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:51:00,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506048765] [2021-08-06 19:51:00,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506048765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:51:00,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020454705] [2021-08-06 19:51:00,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:51:00,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:51:00,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:51:00,063 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 19:51:00,094 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 19:51:02,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:51:02,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:51:02,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:51:02,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:51:02,880 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 93.7 percent of original size [2021-08-06 19:51:02,882 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 93.7 percent of original size [2021-08-06 19:51:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:51:02,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020454705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:51:02,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:51:02,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-08-06 19:51:02,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795795659] [2021-08-06 19:51:02,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:51:02,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:51:02,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:51:02,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:51:02,909 INFO L87 Difference]: Start difference. First operand 348356 states and 850184 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-06 19:51:03,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:51:03,116 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 19:51:03,129 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 19:51:03,129 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 19:51:03,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 19:51:03,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:51:03,318 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (348356states) and FLOYD_HOARE automaton (currently 7 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (12646 states constructed, input type IntersectNwa). [2021-08-06 19:51:03,319 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 19:51:03,319 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 19:51:03,319 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 19:51:03,319 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-06 19:51:03,319 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4INUSE_VIOLATION [2021-08-06 19:51:03,319 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5INUSE_VIOLATION [2021-08-06 19:51:03,322 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 19:51:03,322 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 19:51:03,323 INFO L202 PluginConnector]: Adding new model exp3x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 07:51:03 BasicIcfg [2021-08-06 19:51:03,323 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 19:51:03,323 INFO L168 Benchmark]: Toolchain (without parser) took 546896.45 ms. Allocated memory was 186.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 166.8 MB in the beginning and 5.1 GB in the end (delta: -5.0 GB). Peak memory consumption was 2.9 GB. Max. memory is 8.0 GB. [2021-08-06 19:51:03,323 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.37 ms. Allocated memory is still 186.6 MB. Free memory was 168.0 MB in the beginning and 167.9 MB in the end (delta: 85.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 19:51:03,324 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.47 ms. Allocated memory is still 186.6 MB. Free memory was 166.8 MB in the beginning and 165.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 19:51:03,324 INFO L168 Benchmark]: Boogie Preprocessor took 12.61 ms. Allocated memory is still 186.6 MB. Free memory was 165.2 MB in the beginning and 164.2 MB in the end (delta: 961.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 19:51:03,324 INFO L168 Benchmark]: RCFGBuilder took 182.07 ms. Allocated memory is still 186.6 MB. Free memory was 164.2 MB in the beginning and 151.1 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-06 19:51:03,324 INFO L168 Benchmark]: TraceAbstraction took 546680.20 ms. Allocated memory was 186.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 150.5 MB in the beginning and 5.1 GB in the end (delta: -5.0 GB). Peak memory consumption was 2.8 GB. Max. memory is 8.0 GB. [2021-08-06 19:51:03,324 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 0.37 ms. Allocated memory is still 186.6 MB. Free memory was 168.0 MB in the beginning and 167.9 MB in the end (delta: 85.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 17.47 ms. Allocated memory is still 186.6 MB. Free memory was 166.8 MB in the beginning and 165.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.61 ms. Allocated memory is still 186.6 MB. Free memory was 165.2 MB in the beginning and 164.2 MB in the end (delta: 961.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 182.07 ms. Allocated memory is still 186.6 MB. Free memory was 164.2 MB in the beginning and 151.1 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 546680.20 ms. Allocated memory was 186.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 150.5 MB in the beginning and 5.1 GB in the end (delta: -5.0 GB). Peak memory consumption was 2.8 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 41570, positive: 39752, positive conditional: 39752, positive unconditional: 0, negative: 1818, negative conditional: 1818, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 39752, positive: 39752, positive conditional: 0, positive unconditional: 39752, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 360, positive: 360, positive conditional: 0, positive unconditional: 360, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 360, positive: 360, positive conditional: 0, positive unconditional: 360, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 39752, positive: 39392, positive conditional: 0, positive unconditional: 39392, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 360, unknown conditional: 0, unknown unconditional: 360] , Statistics on independence cache: Total cache size (in pairs): 360, Positive cache size: 360, Positive conditional cache size: 0, Positive unconditional cache size: 360, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 1818 - 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: 82]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (348356states) and FLOYD_HOARE automaton (currently 7 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (12646 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (348356states) and FLOYD_HOARE automaton (currently 7 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (12646 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (348356states) and FLOYD_HOARE automaton (currently 7 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (12646 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (348356states) and FLOYD_HOARE automaton (currently 7 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (12646 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (348356states) and FLOYD_HOARE automaton (currently 7 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (12646 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (348356states) and FLOYD_HOARE automaton (currently 7 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (12646 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (348356states) and FLOYD_HOARE automaton (currently 7 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (12646 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 13 procedures, 72 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 546584.6ms, OverallIterations: 63, TraceHistogramMax: 2, EmptinessCheckTime: 42334.7ms, AutomataDifference: 134880.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 442.8ms, PartialOrderReductionTime: 432.8ms, HoareTripleCheckerStatistics: 3639 SDtfs, 7449 SDslu, 11527 SDs, 0 SdLazy, 16045 SolverSat, 223 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6686.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2205 GetRequests, 1608 SyntacticMatches, 116 SemanticMatches, 481 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 3392.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=348610occurred in iteration=58, InterpolantAutomatonStates: 544, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 290043.3ms AutomataMinimizationTime, 62 MinimizatonAttempts, 569001 StatesRemovedByMinimization, 62 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 494.5ms SsaConstructionTime, 1019.2ms SatisfiabilityAnalysisTime, 26575.0ms InterpolantComputationTime, 3844 NumberOfCodeBlocks, 3844 NumberOfCodeBlocksAsserted, 159 NumberOfCheckSat, 3728 ConstructedInterpolants, 0 QuantifiedInterpolants, 44117 SizeOfPredicates, 231 NumberOfNonLiveVariables, 6290 ConjunctsInSsa, 503 ConjunctsInUnsatCore, 116 InterpolantComputations, 10 PerfectInterpolantSequences, 162/476 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